BioStacks
Allergy Research Group

5-HTP 50 mg

1 Capsule × 3/day · 150 servings · $0.34/serving

iHerbAmazon

Best for

Sleep

Ingredients (1)

L-5-Hydroxytryptophan

100%

Dose/day

150 mg

Target

100–300 mg

Form

—

Other Ingredients (3)

HypromelloseCapsule

Plant-derived capsule material from cellulose

LeucineFlow Aid

Branched-chain amino acid used as a processing aid

Microcrystalline CelluloseBinder

Plant-derived cellulose used as a binder and filler in supplements

How to Take It

Best taken in the evening

Take in the evening. Amino acids compete for the same transport into the brain, 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
Label directs 3 servings — keep one for the evening

On the label

As a dietary supplement, take 1 capsule three times daily, or as directed by a 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

$50.39

$10$20$50

Pricier than 83% of 56 5-HTP 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.

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