Skip to main content
NOW Foods, AMINO_ACID, analyzed by IngredientMD

NOW L-Tryptophan 500mg

1 ingredient documented, every dose read against the trials. The verdict set below is generated by the engine. NOW Foods can't edit it, and neither can we.

1 ingredient documentedRead line by lineLabel on file
NOW Foods NOW L-Tryptophan 500mg, front of pack
Front of pack, photograph on file
The verdict
Clinical dose, proven form.
For general wellness buyers.

L-Tryptophan at 1000mg (2 caps) hits the optimal dose exactly. Free-form for better absorption. Clean formula with no unnecessary additions. Delivers perfectly on its purpose as a serotonin precursor for mood and sleep support.

Also earned
Clinically provenAdequate dose of L-TryptophanFree-form for good absorptionSimple and straightforward product

The set is generated, never written by the brand.

The read

NOW Foods NOW L-Tryptophan 500mg: the formulation holds up. Lead: L-Tryptophan at 1000 mg. L-Tryptophan at 1000mg (2 caps) hits the optimal dose exactly. Clinical dose on the primary, and the panel holds together.

Sleep support, mood enhancement, relaxation.. The product provides 1000mg of free-form L-Tryptophan. This is an adequate dose for sleep and mild mood support. It's a simple, single-ingredient product.

NOW Foods NOW L-Tryptophan 500mg, front of packWhat's in this, per 2 veg capsules
✓ dose matches what trials used
L-TryptophanFree-Form1000 mg✓

1 of 1 shown, 1 dose at what the trials used

Also on the label (inactive): Cellulose (capsule), Cellulose Powder, Stearic Acid (vegetable source)

NOW L-Tryptophan 500mg supplement facts
What we analyzed

This read comes from the product's own supplement facts panel. Every dose was cross-referenced with published clinical trials to see whether it matches what the studies actually used.

1 ingredient read1 at trial doses
The source label →
Work at NOW Foods? Put your own evidence on your product pages →
Capsules arranged in a tray
Behind every ingredient on this label
Read the evidence itself.

Every active in NOW L-Tryptophan 500mg has its own page: doses, forms, interactions, cautions, and the studies behind them.

Browse the library