BioStacks
Best for
Ingredients (9)
AjiPure® Pharmaceutical Grade L-Methionine
75%Dose
150 mg
Target
200–1000 mg
Form
—
AjiPure® Pharmaceutical Grade L-Tryptophan
60%Dose
150 mg
Target
250–1000 mg
Form
—
AjiPure® Pharmaceutical Grade L-Histidine
30%Dose
150 mg
Target
500–4000 mg
Form
—
AjiPure® Pharmaceutical Grade L-Phenylalanine
30%Dose
150 mg
Target
500–1500 mg
Form
—
AjiPure® Pharmaceutical Grade L-Threonine
30%Dose
150 mg
Target
500–4000 mg
Form
—
Other Ingredients (2)
Rice FlourFiller
Rice-based ingredients carry risk of inorganic arsenic contamination (FDA and Consumer Reports). Rice accumulates arsenic from soil at higher rates than other grains. Used as a cheap filler — adds nothing beneficial.
HypromelloseCapsule
Plant-derived capsule material from cellulose
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.
On an empty stomach
Keep it away from protein-heavy meals
Space it a couple of hours from SAMe
On the label
As a dietary supplement, take two vegan capsules per day with water.
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
$16.79
Cheaper than 80% of 11 histidine 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.