BioStacks
Best for
Ingredients (6)
L-Theanine
100%Dose
100 mg
Target
100–250 mg
Form
—
Holy Basil aerial part extract
67%Dose
200 mg
Target
300–600 mg
Form
—
Ashwagandha root
83%Dose
250 mg
Target
300–600 mg
Form
Budget
5-HTP
50%Dose
50 mg
Target
100–300 mg
Form
—
Reishi mycelium/fermented brown rice biomass
20%Dose
200 mg
Target
1000–3000 mg
Form
—
Other Ingredients (1)
PullulanCapsule
Polysaccharide produced by fungal fermentation, used as a vegan capsule material
How to Take It
Best taken in the evening
Contains 5-HTP, so it belongs in the evening. Ashwagandha is easier on the stomach taken with food.
With food
5-HTP 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.
Keep it away from protein-heavy meals
Space it a couple of hours from SAMe
On the label
As a dietary supplement, take 2 capsules once per day. Can be taken with food or on an empty stomach or as recommended by your healthcare professional.
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
$29.95
Near the median of 118 theanine 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.