BioStacks
Best for
Ingredients (5)
L-Leucine
100%Dose
2000 mg
Target
2000–5000 mg
Form
—
Vitamin B6
8%Dose
2 mg
Target
25–100 mg
Form
Premium
L-Isoleucine
67%Dose
1000 mg
Target
1500–4000 mg
Form
—
L-Valine
67%Dose
1000 mg
Target
1500–4000 mg
Form
—
L-Glutamine
20%Dose
1000 mg
Target
5000–15000 mg
Form
—
Nutrition
Calories, macros & sodium.
- Sodium20 mg
Other Ingredients (6)
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 and Artificial FlavorsFlavor
The 'artificial' component means synthetic chemicals are used, but the exact compounds are proprietary and not disclosed on the label. If you have sensitivities or allergies, you cannot verify what's in it. Products using only natural flavors are more transparent.
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
PotassiumMineral
Essential mineral naturally present in many plant-based supplement ingredients
Sea SaltFlavor
Basic food-grade salt used for taste in supplements
How to Take It
Best taken in the morning
Many people prefer B-vitamins earlier in the day; take with food to avoid nausea.
With food
Glutamine does better on an empty stomach, but something else in this bottle needs food. Taking the whole product with a meal is the better trade — an upset stomach is why most people stop.
On the label
Mix one scoop with 8 ounces of water, before, during, and after training for optimal performance and results.
General guidance based on the ingredients, not a substitute for the label or your doctor.
Price Check
$39.99
Near the median 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.