BioStacks
Ingredients (10)
Caffeine
100%Dose
160 mg
Target
100–400 mg
Form
—
L-Theanine
100%Dose
200 mg
Target
100–250 mg
Form
—
Magnesium
100%Dose
105 mg
Target
100–400 mg
Form
Standard
L-Citrulline
100%Dose
3000 mg
Target
3000–6000 mg
Form
—
Betaine Anhydrous
100%Dose
2500 mg
Target
2500–6000 mg
Form
—
Other Ingredients (5)
SucraloseSweetener
Dose context matters. As a trace excipient in a tablet coating or capsule, the amount is minimal and not a meaningful concern. The evidence below applies to the gram-level intakes typical of sweetened protein powders, pre-workouts, and drink mixes: a 2022 human trial (Suez et al., Cell) showed sucralose disrupts gut bacteria and worsens blood sugar control in healthy adults, and a 2023 study (Schiffman et al.) found that sucralose-6-acetate — a compound formed when sucralose is digested — was genotoxic to human cells in vitro. It remains an artificial sweetener with no nutritional purpose.
Natural FlavorsFlavor
Broad regulatory category of flavor constituents derived from natural sources. Composition is proprietary and not disclosed — 'Natural Flavors' can include several hundred different compounds depending on the target flavor profile, including hexane-extracted constituents and proprietary carrier solvents. 'Natural' is a regulatory definition (21 CFR §101.22), not a safety guarantee.
Silicon DioxideAnti-caking
Fine silica powder used to prevent clumping
Calcium SilicateAnti-caking
Inorganic compound used as an anti-caking and flow agent in powdered supplements
Citric AcidAcidulant
Natural acid derived from citrus fruits
How to Take It
Best taken in the morning
Contains Caffeine, which is stimulating — keep it to the morning. Take it with food — the potassium in it is what makes this kind of product feel nauseating on an empty stomach.
With food
Keep it away from iron-rich meals
Space it a couple of hours from Iron and Calcium
On the label
Take 1 scoop daily.
General guidance based on the ingredients, not a substitute for the label or your doctor.
Price Check
$24.99
Pricier than 70% of 35 citrulline supplements
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Sources & Scoring
Nutrient data (RDA, UL, and safety thresholds) sourced from: NIH Office of Dietary Supplements and National Academies Dietary Reference Intakes (DRI).
This is not medical advice. Consult a healthcare provider before making changes to your supplement routine.
The score analyzes what's on the label: ingredient doses vs. clinical ranges, chemical forms, evidence levels, and known interactions. It does not verify label accuracy or test for contaminants — for that, look for third-party certifications like USP or NSF.