BioStacks
Best for
Ingredients (6)
Zinc
67%Dose
10 mg
Target
15–30 mg
Form
Premium
L-Glutamine
80%Dose
4000 mg
Target
5000–15000 mg
Form
—
Deglycyrrhized Licorice Root Extract
100%Dose
400 mg
Target
150–500 mg
Form
—
Vitamin A
86%Dose
600 mcg RAE
Target
700–1500 mcg
Form
Not listed
Aloe Vera Leaf Gel Extract
75%Dose
75 mg
Target
100–400 mg
Form
—
Other Ingredients (2)
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
How to Take It
Take it anytime
Take it with a meal containing fat — the vitamin A in it absorbs poorly without one.
With a meal containing fat
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.
Space it a couple of hours from Iron and Calcium
General guidance based on the ingredients, not a substitute for the label or your doctor.
Price Check
$47.90
Pricier than 80% of 91 glutamine 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.