NOW Foods 5-HTP 100 mg Review
NOW 5-HTP 100 mg Veg Capsule is listed under the Amino Acids category on the NOW Foods website. The product description states that 5-HTP, the intermediate metabolite between the amino acid L-tryptophan and serotonin, is extracted from the seed of an African plant (Griffonia simplicifolia). The product is positioned for neurotransmitter support, and the page lists the claim Supports a Positive Mood. The suggested usage is one capsule daily, preferably on an empty stomach at bedtime. The page advises storing the product in a cool, dry place after opening. Natural color variation may occur, and the product color is described as beige. The supplement facts panel lists a serving size of one veg capsule with 60 servings per container, and each serving provides 100 mg of 5-HTP from Griffonia simplicifolia Extract (seed). The daily value is not established. Other ingredients are rice flour and hypromellose, which is a cellulose capsule. The page states the product is not manufactured with wheat, gluten, soy, milk, egg, fish, shellfish or tree nut ingredients, but is produced in a GMP facility that processes other ingredients containing these allergens. The caution section says the product is for adults only and is not recommended for pregnant or nursing women. Consumers should consult a physician if taking medications, especially meds, or if they have a medical condition. The label notes it may cause drowsiness and mild transient GI symptoms, and advises taking it with food in case of GI upset. It should be kept out of reach of children. The page lists the Halal, Kosher (Triangle K), Non-GMO and Intertek GMP Supplement Certification seals. It also tags the product as Made without Dairy, Made without Eggs, Gluten Free, Made without Nuts, Made without Soy, and Vegan or Vegetarian. Available sizes shown are 60, 90 and 120 veg capsules, and the 60 count is on sale at 12.74. The company describes itself as family owned since 1968. The statements have not been evaluated by the Food and Drug Administration, and the product is not intended to diagnose, treat, cure or prevent any disease.
Study, Trial or Testing Result Summary
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5 of these 33 human studies gave 5-htp by drip, not by mouth.
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Supplement Facts
5-HTP 100 mg
| 5-HTP (5-hydroxytryptophan) (from Griffonia simplicifolia Extract) (Seed) | 100 mg | † |
Other ingredients: Rice Flour, Hypromellose (cellulose capsule).
Directions: Take 1 capsule daily, preferably on an empty stomach at bedtime.
Label source: the brand's label · Report a label change
Where to Buy
NOW Foods
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Graded October 26, 2026 by the Reverse Age Lab evidence engine, from human studies, real reviews and our biohacker panel. How we grade. Is this medical advice? No. Rala organizes the published evidence; go over any change with your doctor, especially if you take meds.

