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NutraBio
PRE
High stimulant content · Read safety guidance
Our analysis — editorial take, not from the label
One of the few pre-workouts that discloses every ingredient at its exact dose rather than blends; the 2025 formula pairs 350 mg of caffeine with 10 g of citrulline, both at or above typical study doses.
- Caffeine
- 350 mg
- Citrulline
- 10 g
- Beta-alanine
- 3.2 g
- Servings
- 20
Price tier: Premium · relative cost per full serving across this database
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Sold in five candy-forward flavors (Blue Razz, Lemon Burst, Wild Watermelon, Paradise Punch, Orange Mango Tango); this stimulant version is artificially sweetened, while NutraBio's separate Natural PRE line uses stevia instead.
Label verified: July 2026 · View label source
Label data
Per full serving · 20 servings per container · from the manufacturer's panel
| Caffeine | 350 mg |
|---|---|
| L-Citrulline | 10 g |
| Beta-Alanine | 3.2 g |
| Betaine Anhydrous | 1.5 g |
| Proprietary blend | No |
Primary label source: NutraBio – official PRE product page · verified July 2026
Cautions
- 350 mg caffeine is roughly three to four cups of coffee in a single scoop; not a beginner dose.
- 3.2 g beta-alanine commonly causes a harmless temporary skin-tingling sensation (paresthesia).
- The 2025 formula is a large roughly 30 g scoop that stacks nitrates, alpha-GPC and vincamine on top of the stimulants, so it introduces far more active ingredients at once than a simpler pre-workout.
Formulated for healthy adults — not intended for anyone under 18. Performance studies use roughly 3–6 mg of caffeine per kg of body weight, which puts 350 mg at the studied amount for a 58–117 kg adult. Full health & safety notes
Product details
Where this label sits
NutraBio PRE sits in the high stim tier of the Scoop Sense pre-workout database, which spans 0–400 mg of caffeine per serving. Every active ingredient on the panel is listed with its own dose — nothing is hidden inside a blend total. It runs 20 servings per container at the full labeled serving. Everything on this page comes from the manufacturer's supplement facts panel as of July 2026 — never from the marketing page.
Key ingredients & studied doses
- L-Citrulline · 10 g. Above the 6-8 g range used in most citrulline pump-and-endurance studies.
- Beta-Alanine · 3.2 g. Matches the roughly 3.2 g daily dose shown to reduce muscular fatigue in beta-alanine research.
- Caffeine (Anhydrous + Infinergy di-caffeine malate) · 350 mg. Total caffeine from a mix of fast-acting anhydrous and slower-releasing Infinergy di-caffeine malate; sits well above the roughly 200 mg used in most acute performance-caffeine studies.
- Betaine Anhydrous · 1.5 g. Below the 2.5 g daily betaine dose used in power-output research on its own, though the label's total betaine reaches about 2.5 g once the betaine nitrate is counted.
Flavors & sweetener
Sold in five candy-forward flavors (Blue Razz, Lemon Burst, Wild Watermelon, Paradise Punch, Orange Mango Tango); this stimulant version is artificially sweetened, while NutraBio's separate Natural PRE line uses stevia instead.
Who it's best for
Experienced high-stimulant users only — not a sensible first pre-workout. Derived from the label figures above — not medical advice.
How we log this label
Every entry is built the same way: we read the current supplement facts panel, log each disclosed dose, compare it against the amounts used in published research, flag proprietary blends, and state the cautions plainly. The full methodology explains each step.
This label against the research
How we evaluate labelsEach bar shows the amount commonly used in published human research, and where this label's dose falls against it. Research amounts are context, not a recommendation — they are not doses, and nothing here is medical advice.
-
Citrulline10 g
At or above the studied amount0studied range 6 g–8 g10 g
Studies use about 6 g of pure L-citrulline, or 8 g of citrulline malate — which is about 5.3 g of citrulline at the usual 2:1 ratio, and closer to 4 g if the label is 1:1.
Source: Gough et al., European Journal of Applied Physiology 2021 — “The most commonly employed dose of CM is a single acute 8 g dose”
-
Beta-alanine3.2 g
At or above the studied amount0studied range 3.2 g–6.4 g7 g
Studied as a daily loading protocol of 3.2–6.4 g taken for four weeks or longer. A single serving below that range still counts toward the daily total, but one scoop is not a studied dose on its own.
Source: Rezende et al., Frontiers in Physiology 2020 — “It seems that substantial amounts of BA are required to increase MCarn, with most studies using doses of ~3.2–6.4 g·day−1, for periods ranging from 4 to 24 weeks.”
-
Caffeine350 mg
At or above the studied amount0studied range 200 mg–400 mg450 mg
Performance studies most often use 3–6 mg per kg of body weight, which works out to roughly 200–400 mg for most adults. The FDA cites 400 mg a day as an amount not generally associated with negative effects in healthy adults.
Source: Guest et al., Journal of the International Society of Sports Nutrition 2021 — “Caffeine has consistently been shown to improve exercise performance when consumed in doses of 3–6 mg/kg body mass.”
-
Betaine1.5 g
60% of the low end of the studied range0studied range 2.5 g3.5 g
Trials run from 1.25 g to 5 g a day; 2.5 g, usually split into two doses, is the amount most of them use.
Source: Lee et al., Journal of the International Society of Sports Nutrition 2010 — “Betaine supplement (B) was given as 1.25 grams (g) of betaine (Danisco Inc., Ardsley, NY) in 300 mL of Gatorade© sports drink, taken twice daily”
Common questions about NutraBio PRE
How much caffeine is in NutraBio PRE?
350 mg per full labeled serving — roughly 3.7 small cups of coffee. Within the Scoop Sense pre-workout database (0–400 mg per serving) that places it in the high stim tier. The FDA cites about 400 mg per day as an amount generally not associated with negative effects in healthy adults, and coffee, tea, and energy drinks count toward the same total.
Why does NutraBio PRE make my skin tingle?
The 3.2 g of beta-alanine. The prickling (paresthesia) in the face, neck, and hands is generally considered harmless, is dose-dependent, and fades on its own — typically within about an hour. Most beta-alanine studies use 3.2 g per day.
Does NutraBio PRE disclose every dose?
Yes — the label lists an individual amount for each ingredient, with no proprietary blends. That is what the "label fully disclosed" tag on Scoop Sense means, and it is what lets each dose be compared against the amounts used in published research.
Do the numbers for NutraBio PRE assume one scoop or two?
All figures on this page are per full labeled serving. 350 mg caffeine is roughly three to four cups of coffee in a single scoop; not a beginner dose..