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Nutricost
Pre-X Xtreme
High stimulant content · Read safety guidance
Our analysis — editorial take, not from the label
A fully-disclosed, blend-free label with generous citrulline, taurine, and Nitrosigine doses plus a straightforward 300mg caffeine anhydrous kick, at one of the lowest costs per serving in this set.
- Caffeine
- 300 mg
- Citrulline
- 4 g
- Beta-alanine
- 2 g
- Servings
- 30
Price tier: Budget · relative cost per full serving across this database
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Five flavors (Blue Raspberry, Watermelon, Fruit Punch, Grape, Peach Mango) sweetened with sucralose; the Blue Raspberry panel checked here uses blue spirulina for color rather than a synthetic dye, and colorings vary by flavor.
Label verified: July 2026 · View supplement facts image
Label data
Per full serving · 30 servings per container · from the manufacturer's panel
| Caffeine | 300 mg |
|---|---|
| L-Citrulline | 4 g |
| Beta-Alanine | 2 g |
| Nitrosigine | 1.5 g |
| Taurine | 2 g |
| Proprietary blend | No |
Primary label source: Nutricost — official Pre-X Xtreme product page and supplement facts panel · verified July 2026
Cautions
- 300mg caffeine anhydrous per 1-scoop (17g) serving is roughly three cups of coffee, and the panel uses a single serving basis with no multi-scoop column.
- 2g beta-alanine commonly causes a tingling (paresthesia) sensation.
- Label instructs users not to exceed one scoop in any 24-hour period and not to consume more than 400mg of caffeine from all sources in 24 hours.
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 300 mg at the studied amount for a 50–100 kg adult. Full health & safety notes
Product details
Where this label sits
Nutricost Pre-X Xtreme 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 30 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 · 4 g. A solid dose of straight L-citrulline, at or above amounts used in blood-flow and pump research.
- Beta-Alanine · 2 g. Below the 3.2-6.4g/day range used in carnosine-loading studies, but still likely to cause tingling in most users.
- Nitrosigine · 1.5 g. Matches the 1.5g dose used in Nitrosigine's published nitric-oxide and blood-flow research.
- Taurine · 2 g. A generous supportive dose within the 1-6g range used in taurine performance research.
Flavors & sweetener
Five flavors (Blue Raspberry, Watermelon, Fruit Punch, Grape, Peach Mango) sweetened with sucralose; the Blue Raspberry panel checked here uses blue spirulina for color rather than a synthetic dye, and colorings vary by flavor.
Who it's best for
Users with an established caffeine tolerance. A reasonable pick when cost per serving matters. 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.
-
Citrulline4 g
67% of the low end of the studied range0studied 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-alanine2 g
63% of the low end of the studied range0studied 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.”
-
Nitrosigine1.5 g
At or above the studied amount0studied range 1.5 g2 g
The manufacturer's own published work uses 1.5 g, and formulas that include it generally match that amount.
Source: Kalman et al., Nutrients 2016 — “The active treatment contained 1500 mg of ASI (arginine, silicon, inositol and potassium)”
-
Taurine2 g
At or above the studied amount0studied range 1 g–6 g7 g
Trials run from 1 g to 6 g a day, given as single doses or for up to two weeks, with mixed results across studies.
Source: Waldron et al., Sports Medicine 2018 — “The doses of taurine ranged from 1 to 6 g/day and were provided in single doses and for up to 2 weeks among a range of subjects.”
-
Caffeine300 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.”
Common questions about Nutricost Pre-X Xtreme
How much caffeine is in Nutricost Pre-X Xtreme?
300 mg per full labeled serving — roughly 3.2 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 Nutricost Pre-X Xtreme make my skin tingle?
The 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 Nutricost Pre-X Xtreme 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 Nutricost Pre-X Xtreme assume one scoop or two?
All figures on this page are per full labeled serving. 300mg caffeine anhydrous per 1-scoop (17g) serving is roughly three cups of coffee, and the panel uses a single serving basis with no multi-scoop column..