Under Labz Rampage (2026) — Full Breakdown: Formula, Dosages, Safety and How It Stacks Up to Fcking Booster

Table of Contents

1. Key Highlights
2. Introduction
3. What changed: Rampage returns with a leaner, high-stimulus profile
4. Ingredient breakdown: what each component contributes and what the doses mean
5. How Rampage compares with Fcking Booster and other pre-workout options
6. Performance expectations: what users are likely to feel and why
7. Safety and tolerance: handling a 400 mg caffeine serving responsibly
8. Arginine vs citrulline: why the difference matters for pumps
9. The role of beta-alanine and dosing strategy for meaningful results
10. Who should use Rampage and who should avoid it
11. Practical usage and timing recommendations
12. How to stack Rampage with other supplements for a rounded regimen
13. Flavor and user experience: what to expect from Blueberry Raspberry, Lemon and Watermelon Lemon
14. Pricing and availability: value proposition in Brazil and beyond
15. Evidence behind the key actives: what research supports the choices
16. Manufacturing transparency and ingredient labeling
17. Practical scenarios and real-world examples
18. Regulatory and labeling context: buying high-stimulant supplements across borders
19. A buyer’s checklist: what to inspect before hitting purchase
20. Limitations and trade-offs of Rampage’s formula
21. Responsible use and common sense precautions
22. Final considerations: who Rampage is best for
23. FAQ

Key Highlights

• Under Labz relaunched Rampage in 2026 with a streamlined, performance-focused formula: 2 g beta-alanine, 2 g arginine, 1 g taurine and 400 mg caffeine per serving; tyrosine has been removed compared with some recent premium offerings.
• The product positions itself as a high-stimulant, value pre-workout in Brazil — 30 servings for R$99.90 (~$19.92 USD) — aimed at experienced users seeking intensity and basic performance support rather than cognitive nootropics or elaborate pump blends.
• Major safety consideration: a single serving delivers 400 mg of caffeine, a dose that will produce strong stimulant effects for most adults and requires careful tolerance testing, timing and avoidance of other caffeine sources.

Introduction

Under Labz, a Brazilian supplement maker known locally for its Clinical Series, brought back Rampage this year with a redesigned 2026 formula. The relaunch keeps the product deliberately simple: a short ingredient list that emphasizes energy and core performance support rather than a laundry list of adjunct actives. That simplicity mirrors a growing trend among some regional brands that favor bold stimulant profiles and straightforward performance dosages over trademarked blends and cognitive additives.

The new Rampage resembles a pared-down version of Under Labz’s more feature-rich rival, Fcking Booster. It retains three of the familiar performance staples — beta-alanine, arginine and taurine — and pairs them with a high 400 mg dose of caffeine anhydrous. Unlike some of the brand’s recent premium offerings, Rampage drops tyrosine, signaling a shift away from explicit focus-enhancement toward raw intensity.

This piece examines what the 2026 Rampage formula does, how each ingredient behaves at the stated doses, safety and tolerance considerations around the high stimulant load, how Rampage compares with market peers, and practical recommendations on using the product responsibly. The goal is a realistic, evidence-based view of what buyers should expect in the gym and in daily use.

What changed: Rampage returns with a leaner, high-stimulus profile

Under Labz has offered Rampage before, but the 2026 version arrives with a simplified formula and updated branding. The product is sold in 30-serving tubs in three flavors — Blueberry Raspberry, Lemon and Watermelon Lemon — at a retail price of R$99.90 on the brand’s website. That price point undercuts many premium pre-workouts on the market while delivering a notably high stimulant dose.

Where some contemporary pre-workouts layer multiple focus, mood and pump ingredients, Rampage takes a different route: it keeps a small set of core actives at doses that aim to deliver perceptible effects. The formula intentionally omits tyrosine, an amino acid used in some supplements to support focus, and relies on arginine rather than the increasingly common citrulline for nitric oxide support. This creates a product that is easier to formulate and cheaper to produce, and therefore priced well below premium imports — but the trade-offs matter in terms of physiological effects.

The relaunch signals a strategic choice. Under Labz appears to target experienced gym-goers and stimulant-tolerant athletes who prioritize raw energy and a few proven performance aids over nuanced cognitive stacks. For brands competing in price-sensitive markets or aiming for everyday usability, that approach can be commercially effective. Consumers must evaluate whether the simplified ingredient package aligns with their training goals and tolerance.

Ingredient breakdown: what each component contributes and what the doses mean

Understanding how Rampage is likely to perform requires unpacking each ingredient and the scientific consensus behind common dosing ranges.

• Beta-alanine — 2 g
  • Role: Beta-alanine is a precursor to carnosine, a muscle buffer that helps delay the onset of muscle fatigue during high-intensity exercise by buffering hydrogen ions.
  • Evidence and dosing: Studies show performance benefits in activities lasting 1–4 minutes and improvements in repeated sprint tasks when beta-alanine is used consistently to raise muscle carnosine levels. Effective loading protocols typically total 3–6 g daily for several weeks to significantly elevate intramuscular carnosine. Single doses of 2 g produce immediate tingling (paresthesia) and contribute to daily intake but are on the lower end of what’s often recommended for faster loading.
  • Practical note: Users should expect the characteristic tingling sensation at a 2 g dose; splitting the dose across the day reduces this sensation if desired.
• Arginine — 2 g
  • Role: Arginine serves as a substrate for nitric oxide (NO) production, which can improve blood flow and “pump.” It’s often included for acute vascular effects.
  • Evidence and dosing: Oral arginine is subject to significant first-pass metabolism in the gut and liver, which reduces its bioavailability. Consequently, arginine at 2 g shows variable and often modest effects on plasma arginine and nitric oxide markers. Many modern pre-workouts favor citrulline (often 6–8 g of citrulline malate) because it converts to arginine more reliably and elevates plasma arginine concentrations more effectively than taking arginine directly.
  • Practical note: Arginine at 2 g may support a mild pump for some users but typically will not match the pump delivered by higher citrulline doses.
• Taurine — 1 g
  • Role: Taurine functions as an osmolyte and neuromodulator. It stabilizes cell membranes, supports hydration and can modulate calcium handling in muscle. Taurine often appears in stimulant formulas because it may smooth the subjective effects of caffeine.
  • Evidence and dosing: Doses of 1–2 g are commonly used and appear safe. Taurine may help attenuate some negative cardiovascular effects of stimulants, and it may enhance endurance in certain contexts.
  • Practical note: At 1 g, taurine is present at a functional but not heavy dose — enough to contribute to cellular hydration and possibly blunt jitteriness for some users.
• Caffeine anhydrous — 400 mg
  • Role: Caffeine is the primary stimulant and central nervous system activator; it enhances alertness, perception of effort and high-intensity endurance. It also increases lipolysis and can improve power output.
  • Evidence and dosing: Caffeine reliably improves many forms of exercise performance at doses commonly in the 3–6 mg/kg body weight range. For a 70 kg person, that equates to 210–420 mg. Authorities generally regard up to 400 mg per day as a safe upper limit for most healthy adults. Even so, a single serving with 400 mg is high and will feel very strong for many people, particularly those who consume additional caffeine during the day.
  • Practical note: Users should test tolerance with a smaller dose initially, avoid combining with other caffeine sources, and not use late in the day to prevent sleep disruption.

The overall formula reflects an emphasis on acute stimulant-driven performance and a baseline of proven endurance support from beta-alanine and taurine. The arginine inclusion is conventional but unlikely to deliver the robust pumps that citrulline-centric formulas provide at higher cost.

How Rampage compares with Fcking Booster and other pre-workout options

Comparisons matter because many buyers weigh cost and ingredient transparency against clinical efficacy.

• Fcking Booster (Under Labz’s premium competitor)
  • The premium product included tyrosine for cognitive support and likely had a more complex blend to address focus and mood. Reports suggest Fcking Booster also used a combination of beta-alanine, arginine and taurine with a similar caffeine level.
  • Rampage positions itself as a simplified alternative: it maintains the core performance trio (beta-alanine, arginine, taurine) and the high stimulant hit while dropping tyrosine. The result is a leaner product with lower retail price.
• Typical mass-market pre-workouts (e.g., large U.S. brands)
  • Many U.S. mainstream pre-workouts offer varied stimulant doses. Mid-range products commonly feature 150–300 mg caffeine, adding citrulline malate or Nitrosigine for pumps, and often include smaller doses of beta-alanine and creatine.
  • Rampage stands out for delivering 400 mg caffeine per serving — higher than many mainstream options — but it does not include larger pump agents like citrulline malate at proven doses.
• Stimulant-free and lower-stimulant alternatives
  • Users seeking pumps without high stimulants will often choose citrulline-based formulas and stimulant-free pre-workouts. For individuals sensitive to stimulants, these alternatives are safer and more sustainable for daily use.

Where Rampage sits in the market is clear: it targets stimulant-experienced lifters who want a potent rush and a basic set of performance supports without paying for premium cognitive or pump-focused ingredients. For cost-conscious consumers in Brazil, the price-to-stimulant ratio is compelling. For buyers who prioritize evidence-backed pump ingredients or cognitive nootropics, Rampage may fall short.

Performance expectations: what users are likely to feel and why

Given the doses, what should someone expect after taking Rampage?

• Energy and drive: The 400 mg caffeine dose will produce a powerful stimulant effect for most adults. Expect marked increases in alertness, motivation to train, and perceived energy. Reaction times and short-duration power output commonly improve with such stimulants.
• Endurance and high-intensity capacity: Beta-alanine supports repeated high-intensity efforts and can help delay fatigue in sets lasting roughly 60–240 seconds. However, since rampage provides 2 g per serving rather than the larger daily loads used in loading strategies, chronic use will determine the degree to which muscle carnosine levels rise.
• Pump and blood flow: Arginine at 2 g may give a modest pump but will not match the vasodilatory effects of larger citrulline doses. Users seeking extreme vascularity will likely notice a difference compared with citrulline-heavy pre-workouts.
• Focus and mood: Without tyrosine, Rampage offers less direct cognitive support. Many users will still experience heightened focus indirectly because caffeine sharpens attention, but complex cognitive enhancement — mental clarity during fatigue or sustained cognitive tasks — may be less pronounced than in formulas that include tyrosine and nootropics.

Real-world example: a competitive CrossFit athlete accustomed to 300–400 mg of caffeine for competition-day stimulation would find Rampage delivers a familiar intensity and consistent pre-competition edge. A novice gym user or weekend warrior who typically drinks one coffee (80–120 mg caffeine) would likely experience overstimulation and jitteriness on a single full serving.

Safety and tolerance: handling a 400 mg caffeine serving responsibly

A single serving of 400 mg caffeine warrants careful attention. Many health authorities recognize up to 400 mg of caffeine per day as generally safe for healthy adults, but that limit does not mean every individual should consume that much at once or daily.

Key safety considerations:

• Baseline tolerance varies. Regular caffeinated beverage consumers may tolerate 400 mg more easily than someone who rarely consumes caffeine.
• Cardiovascular effects. High doses can cause increased heart rate, elevated blood pressure, palpitations and, in rare cases, more serious arrhythmias in susceptible individuals. Anyone with cardiovascular disease, uncontrolled hypertension, or arrhythmias should avoid high-stimulant pre-workouts or consult a physician.
• Sleep and recovery. Taking 400 mg later in the day compromises sleep architecture. Poor sleep impairs recovery and training adaptation, so avoid ingestion within 6–8 hours of bedtime.
• Anxiety and GI effects. Stimulants can exacerbate anxiety disorders or induce gastrointestinal distress.
• Interactions. Avoid combining Rampage with other caffeine-containing products — energy drinks, strong coffee, or certain medications (e.g., some cold/flu formulations) — to prevent unintended caffeine stacking.
• Pregnancy and breastfeeding. High caffeine intake is not recommended during pregnancy or breastfeeding. Pregnant individuals should consult healthcare providers and generally limit caffeine intake well below 400 mg daily.

Practical tolerance-testing protocol:

• Start with a half serving (200 mg caffeine) to gauge sensitivity. Wait at least 30–45 minutes to assess subjective stimulant effects before training.
• If a half serving is well-tolerated, consider a three-quarter or full serving on non-critical training days rather than on consecutive days to minimize tolerance build and sleep disruption.
• Monitor daily caffeine totals. Keep a running tally of caffeine from all sources to remain below safe daily thresholds.

Many experienced athletes periodize stimulant use: they reserve high-stimulus doses for heavy training sessions or competitions and use low-stimulant alternatives on other days to reduce tolerance and maintain responsiveness.

Arginine vs citrulline: why the difference matters for pumps

Arginine and citrulline are often presented interchangeably in pre-workout marketing, but they act differently physiologically.

Arginine:

• Direct precursor to nitric oxide synthase (NOS)-mediated NO production.
• Oral arginine undergoes significant first-pass metabolism, meaning a large fraction is broken down before reaching systemic circulation.
• Effective acute effects on NO and blood flow require higher oral doses, and results are inconsistent between individuals.

Citrulline:

• Citrulline converts to arginine in the kidneys and raises systemic arginine concentrations more reliably than oral arginine ingestion.
• Common effective doses: 6–8 g of citrulline malate (often cited for robust pump effects).
• Tends to produce more consistent increases in plasma arginine and NO-related effects.

Rampage uses arginine at 2 g, which is likely a cost-effective choice but not the most effective route to maximize muscle pumps. For users who prioritize a strong pump, pairing Rampage with a citrulline supplement (or choosing a pre-workout with higher citrulline) will yield a more pronounced vascular effect.

The role of beta-alanine and dosing strategy for meaningful results

Beta-alanine’s performance benefits emerge over weeks of consistent use, not after a single pre-workout serving.

• Acute effects: Single doses cause paresthesia (a harmless tingling), which some users interpret as “working.” This sensation is not evidence of long-term benefit.
• Loading for effect: To raise muscle carnosine sufficiently, aim for daily intake around 3–6 g. A regimen of 2 g twice daily or 1–1.5 g three times daily reduces paresthesia while accelerating loading.
• Practical application with Rampage: Because each serving delivers 2 g, using Rampage daily will contribute meaningfully to a beta-alanine loading protocol. Users who want quicker carnosine accumulation should supplement additional doses spread across the day or use a dedicated beta-alanine product to reach 3–4 g daily.

Real-world training approach: athletes competing in repeated sprint sports or short-duration high-intensity events may combine Rampage with a separate beta-alanine loading strategy to ensure they achieve the intramuscular buffering needed for peak performance.

Who should use Rampage and who should avoid it

Rampage attracts a specific audience and should be chosen deliberately.

Best candidates:

• Experienced lifters comfortable with high stimulant doses.
• Short-duration athletes who respond well to high caffeine for sharpness and power output.
• Buyers who prioritize cost-efficiency and want a no-frills, energetic pre-workout.

Consider alternative options if you are:

• Stimulant-sensitive, have anxiety disorders, or heart conditions: avoid high-caffeine products.
• New to pre-workouts: start with low-stim or stimulant-free options to gauge baseline tolerance and minimize adverse effects.
• Seeking maximal pump through NO pathways: choose products with higher, clinically supported citrulline doses.
• Looking for cognitive enhancement during long workouts: seek formulas that include tyrosine or similar nootropics.

A demographic example: a semi-pro sprinter who routinely uses 300–400 mg caffeine on race days might reliably integrate a full serving of Rampage on competition day, while a recreational gym-goer who drinks two daily espressos would risk overstimulation and disrupted sleep.

Practical usage and timing recommendations

Caffeine timing and meal context influence Rampage’s effects.

• Timing: Consume 30–60 minutes before training. Peak plasma caffeine levels typically occur within 30–90 minutes post-ingestion, with subjective effects evident within 15–30 minutes.
• Hydration: Caffeine is a mild diuretic and, combined with training, increases fluid needs. Consume water before, during and after workouts.
• Meal effects: Taking the product on an empty stomach accelerates absorption but may increase GI discomfort in some users. A light carbohydrate snack can blunt stomach upset and provide additional training fuel.
• Sleep management: Avoid dosing within 6–8 hours of bedtime to preserve sleep quality. If training late, opt for low-stimulant alternatives.

If you plan to use Rampage regularly, periodic stimulant cycling — weeks on, weeks off, or alternating with stimulant-free days — preserves sensitivity and reduces tolerance.

How to stack Rampage with other supplements for a rounded regimen

Rampage provides a high-stimulant core. Thoughtful stacks can augment areas where the formula is deliberately light.

• Creatine monohydrate: Add daily (3–5 g) to improve strength, power and recovery. Creatine pairs well with stimulants and supports performance independently of caffeine.
• Citrulline malate: For stronger pumps, combine a separate 6 g citrulline malate dose 30–60 minutes pre-workout with Rampage. This addresses the arginine limitation.
• Beta-alanine loading: If rapid carnosine accumulation is a priority, supplement additional beta-alanine (1–2 g across the day) to bring total daily intake into the 3–4 g range.
• Protein and carbs: Pairing Rampage with a pre-workout carbohydrate source can support glycogen availability during longer sessions.
• Electrolytes: High-intensity efforts and stimulants can increase sweating; include electrolytes for hydration and performance maintenance.

Avoid stacking with other high-stimulant products or large caffeine-containing beverages to prevent excessive total caffeine intake.

Flavor and user experience: what to expect from Blueberry Raspberry, Lemon and Watermelon Lemon

Flavor can strongly influence repeat use. Under Labz offers three fruit-forward options: Blueberry Raspberry, Lemon and Watermelon Lemon. While taste is subjective, the formulation’s simplicity likely translates into bright, punchy, sweetened flavors rather than complex profiles.

Practical suggestions:

• Mixing: Use 200–300 ml of water for a concentrated experience or 400–600 ml for a milder taste. Cold water and vigorous shaking or blending improve solubility and mouthfeel.
• Palatability hacks: If sweeter flavors feel too intense, mix with more water or combine half a scoop of Rampage with a no-flavor BCAA or electrolyte drink to moderate sweetness and acidity.
• Real-world feedback: Buyers often prefer citrus flavors for stimulant-heavy products since the tartness offsets the strong stimulant aftertaste. Watermelon and mixed berry flavors tend to be crowd-pleasers but vary by manufacturer.

Pricing and availability: value proposition in Brazil and beyond

At R$99.90 for 30 servings (~R$3.33 per serving) and roughly $19.92 USD at current conversion, Rampage is positioned as an economical option. Under Labz’s direct-to-consumer pricing undercuts many imported premium pre-workouts, making it attractive to price-sensitive consumers.

Availability:

• Sold on Under Labz’s Brazilian website with domestic shipping options.
• International buyers should check shipping policies, customs duties and local regulations around high-caffeine supplements. Shipping times and import charges will vary.

Price comparison example:

• Many premium pre-workouts with advanced pumps and cognitive blends can cost two to three times as much per tub in Brazil after import taxes. Rampage’s lean formula reduces manufacturing cost and retail margin while still delivering a high-stimulant punch.

Evidence behind the key actives: what research supports the choices

Summarizing the research behind core Rampage ingredients clarifies their expected outcomes.

• Caffeine: Robust evidence shows caffeine improves endurance, power and perceived exertion across many sports. Acute dosing in the 3–6 mg/kg range produces measurable benefits; ergogenic effects are well established.
• Beta-alanine: Repeated dosing increases muscle carnosine concentration and delays muscle fatigue in exercise modalities characterized by anaerobic glycolysis. Performance improvements appear after weeks of supplementation.
• Taurine: Research suggests taurine supports muscle function, endurance capacity and cellular hydration. It may help mitigate some cardiovascular effects of stimulants and support recovery.
• Arginine: Evidence is mixed for oral arginine. Because of limited bioavailability, arginine's ability to raise plasma arginine and cause reliable vasodilation is inferior to citrulline.

Combined effects:

• Stimulant-backed formulas reliably increase training intensity and perceived effort tolerance. Beta-alanine supports the physiological substrate to sustain higher outputs. Taurine can moderate adverse stimulant effects. The interplay yields an effective acute training aid for many users, provided the stimulant load aligns with individual tolerance.

Manufacturing transparency and ingredient labeling

Transparent labeling is essential. Consumers should inspect product labels for:

• Exact ingredient amounts per serving (no proprietary blends).
• Caffeine source and amount (clearly listed as 400 mg).
• Warnings and contraindications.
• Batch information and best-before dates.
• Any third-party testing or quality assurance claims.

Under Labz lists explicit dosages for the key ingredients, which helps buyers evaluate efficacy and safety. That transparency should factor into purchase decisions. Third-party testing adds confidence, although availability of certificates varies by brand and market.

Practical scenarios and real-world examples

Scenario 1 — The seasoned lifter preparing for a heavy lower-body session:

• The athlete uses Rampage one hour before squats to maximize arousal and confidence. The 400 mg caffeine provides the stimulant boost for complex lifts; beta-alanine contributes to fatigue resistance across sets if the user has been supplementing consistently. The athlete stacks Rampage with 5 g creatine and a citrulline malate dose for pumps.

Scenario 2 — The recreational gym-goer new to pre-workouts:

• They try half a serving and experience jitters and heart palpitations. They switch to a low-stim pre-workout with 100–150 mg caffeine and add separate beta-alanine/creatine supplementation for sustained progress.

Scenario 3 — CrossFit competitor on competition day:

• The competitor relies on the high caffeine dose to reduce perceived exertion and maintain focus across repeated high-intensity efforts. They use full servings only on event days to preserve stimulant sensitivity.

These scenarios illustrate that Rampage’s utility depends on the user’s baseline caffeine consumption, training demands and tolerance.

Regulatory and labeling context: buying high-stimulant supplements across borders

Different jurisdictions impose varying labeling requirements on high-caffeine supplements. Some markets require warnings on products over a certain caffeine threshold per serving; others regulate maximum allowable contents.

Buyers outside Brazil should:

• Check import regulations and customs policies; some countries restrict or tax supplements heavily.
• Be aware of competitions’ anti-doping rules. While caffeine is no longer on the World Anti-Doping Agency’s prohibited list, excessive use is still frowned upon in some sports contexts and documented levels in urine can affect perception.
• Read local guidance concerning stimulant-containing supplements, particularly if the product is used by adolescents or non-competitive populations.

Under Labz sells Rampage directly in Brazil; international buyers should evaluate logistics and local regulatory compliance before ordering.

A buyer’s checklist: what to inspect before hitting purchase

• Ingredient transparency: Are doses of each active listed per serving? Rampage lists core dosages, which is positive.
• Stimulant level: Confirm the caffeine amount and ensure it fits your daily allowances.
• Pump ingredients: If vascularity is a priority, check for citrulline or higher arginine dosing.
• Consumer reviews: Look for feedback on flavor, mixability and side effects.
• Price vs. value: Compare per-serving cost with alternatives that provide additional clinically supported ingredients.
• Medical contraindications: Read warnings and consult a physician if you have any chronic conditions or take medications.

Following these steps ensures an informed purchase rather than an impulse buy driven by marketing.

Limitations and trade-offs of Rampage’s formula

Every formula involves compromises. Rampage’s strengths and weaknesses are clear:

Strengths:

• High stimulant impact per serving.
• Simple, transparent ingredient list.
• Competitive price point.

Limitations:

• Arginine at 2 g is unlikely to produce the pump some users expect compared with citrulline-based alternatives.
• Beta-alanine is present at a useful but modest 2 g per serving; reaching optimal daily loading will require repeated use or additional supplementation.
• Absence of tyrosine reduces focused cognitive support for long-duration or late-session mental tasks.
• Single-serving stimulant load poses a higher risk for adverse effects in caffeine-sensitive individuals.

Users must weigh these trade-offs based on personal preferences, tolerance and performance priorities.

Responsible use and common sense precautions

• Do not combine with other stimulant products or large amounts of coffee and energy drinks.
• If new to pre-workouts, test with a half serving and monitor heart rate, blood pressure responses and subjective anxiety.
• Avoid use if pregnant, breastfeeding, or diagnosed with cardiovascular disease unless cleared by a healthcare provider.
• Keep out of reach of children.
• Track sleep quality and recovery; if sleep suffers, reduce dose or switch to lower-stim alternatives.

Adopting conservative practices prolongs the supplement’s utility and minimizes potential harm.

Final considerations: who Rampage is best for

Rampage fits a niche: experienced, stimulant-tolerant trainees who place a premium on cost and immediate energy. It serves competition-day athletes and heavy lifters who accept the trade-off of simpler pump support and fewer cognitive actives in exchange for a potent stimulant hit and affordable pricing.

Those prioritizing maximal pump effects, stimulant sensitivity, or a comprehensive cognitive blend should evaluate alternatives or use Rampage as part of a broader stacking strategy that includes citrulline and dedicated cognitive supplements at tolerable doses.

FAQ

Q: How much caffeine is in one serving of Rampage? A: One serving contains 400 mg of caffeine anhydrous.

Q: Is 400 mg of caffeine safe? A: Health authorities commonly consider up to 400 mg of caffeine per day safe for most healthy adults. However, individual tolerance varies. A single serving of 400 mg is a high acute dose and may cause adverse effects in sensitive individuals. Avoid combining this product with other caffeine sources.

Q: Can I take Rampage if I have high blood pressure? A: Individuals with uncontrolled hypertension or cardiovascular conditions should consult a physician before using stimulant-containing supplements. High doses of caffeine can raise blood pressure and heart rate.

Q: Why does Rampage use arginine instead of citrulline? A: Arginine is a direct nitric oxide precursor and historically common in pre-workouts. Citrulline tends to raise systemic arginine levels more reliably and is often used in higher-end formulas. Arginine at 2 g is less expensive to include but typically produces less consistent pump effects than citrulline.

Q: Will beta-alanine in Rampage produce immediate performance benefits? A: Beta-alanine’s acute sensation (tingling) occurs with single doses, but meaningful performance improvements require several weeks of consistent supplementation to elevate muscle carnosine. Rampage’s 2 g per serving can contribute to a loading protocol if used regularly.

Q: Can I take Rampage every day? A: Regular daily use is possible, but frequent consumption of high caffeine doses can increase tolerance and interfere with sleep. Many users cycle stimulant intake or reserve high-stim doses for heavy training and competition days.

Q: How should I start if I’ve never used stimulants before? A: Begin with a half serving to assess tolerance, wait 30–60 minutes to gauge effects, and avoid mixing other caffeine sources on the same day.

Q: Is Rampage suitable for women? A: Healthy women without stimulant sensitivities can use Rampage, but pregnant or breastfeeding women should avoid high-caffeine supplements and consult healthcare providers.

Q: Where can I buy Rampage? A: Under Labz sells Rampage through its Brazilian website. International buyers should verify shipping options, customs regulations and potential import fees.

Q: Can I stack Rampage with creatine and citrulline? A: Yes. Creatine (3–5 g daily) complements Rampage’s stimulant-driven effects. Adding citrulline malate (6 g) can enhance pumps beyond what 2 g arginine delivers. Monitor total stimulant intake and time the stack responsibly.

Q: Does Rampage include tyrosine for cognitive support? A: No. The 2026 Rampage formula does not include tyrosine. Cognitive support will mainly derive from caffeine unless users add a tyrosine supplement.

Q: How many servings are in a tub and what is the price? A: Each tub contains 30 servings and retails on Under Labz’s site for R$99.90 (approximately $19.92 USD at current conversion).

Q: Are there known side effects? A: Common stimulant-related side effects include jitteriness, insomnia, increased heart rate, elevated blood pressure, gastrointestinal upset and paresthesia from beta-alanine. If side effects are severe or persistent, discontinue use and consult a healthcare professional.

Q: How does Rampage compare to premium pre-workouts? A: Rampage focuses on core, high-impact actives at an affordable price. Premium pre-workouts often include higher doses of pump agents (citrulline), cognitive nootropics (tyrosine, alpha-GPC), and additional recovery actives. Choose based on your priorities: stimulant intensity and cost vs. a more comprehensive ingredient profile.

Q: Any tips to improve palatability? A: Mix with more water for a milder flavor, use cold water, or blend with unsweetened electrolyte mixes to adjust taste and mouthfeel.

Q: Is third-party testing available for Rampage? A: Check the product label and Under Labz’s website. Third-party testing varies by manufacturer and product line; look for certificates of analysis or independent testing seals where available.

If further clarification on ingredients, dosing strategies or stacking approaches would help tailor recommendations to your training needs, provide details about your typical caffeine consumption, training goals and any medical conditions.