BioStacks
Best for
Ingredients (10)
L-Leucine
75%Dose
1500 mg
Target
2000–5000 mg
Form
—
L-Lysine HCl
67%Dose
672 mg
Target
1000–3000 mg
Form
—
L-Methionine
64%Dose
128 mg
Target
200–1000 mg
Form
—
L-Threonine
73%Dose
363 mg
Target
500–4000 mg
Form
—
L-Phenylalanine
52%Dose
260 mg
Target
500–1500 mg
Form
—
Nutrition
Calories, macros & sodium.
- Sodium40 mg
Other Ingredients (6)
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.
Paprika OleoresinColorant
Natural orange-red colorant extracted from sweet red peppers (Capsicum annuum); the pigments are capsanthin and capsorubin
Citric AcidAcidulant
Natural acid derived from citrus fruits
Malic AcidAcidulant
Naturally occurring organic acid found in apples, used as a flavor enhancer and acidulant in supplements
Sea SaltFlavor
Basic food-grade salt used for taste in supplements
Stevia ExtractSweetener
Zero-calorie natural sweetener extracted from the leaves of Stevia rebaudiana
How to Take It
Best taken in the evening
Take at night. Other amino acids compete for brain uptake, so a protein-heavy meal blunts it. Take it between meals, away from food.
On an empty stomach
Keep it away from protein-heavy meals
Space it a couple of hours from SAMe
On the label
Dissolve one scoop (7 g) into 8-12 oz of room-temperature water and consume once per day between meals, or use as directed by your healthcare practitioner.
Do not combine with St. John's Wort
Each of these raises serotonin activity on top of St. John's Wort, and together they can trigger serotonin syndrome — agitation, rapid heartbeat, raised blood pressure. Not without medical supervision.
General guidance based on the ingredients, not a substitute for the label or your doctor.
Price Check
$56.00
Pricier than 73% of 165 muscle 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. studied 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.