Klaire Labs 5-HTP 100 mg – 100 Capsules
Klaire Labs 5-HTP 100 mg – 100 Capsules – image 2
Klaire Labs 5-HTP 100 mg – 100 Capsules
Klaire Labs 5-HTP 100 mg – 100 Capsules – image 2
"Very quick delivery. Used 3 times, each order arrived the next day before 12:00"
Hugo Dover
"Reliable & original products, with fast next day delivery. Have been using Welzo for over a year now."
Elina Goulliard
"Welzo is great, lots of support from customer service who are easy to get a hold of and quick delivery."
Elizabeth Moore

Klaire Labs 5-HTP 100 mg – 100 Capsules

78 Reviews
See full range
Klaire Labs 5-HTP 100 mg supplies L-5-hydroxytryptophan extracted from the seeds of Griffonia simplicifolia, a West African shrub that is the standard natural source of this amino acid.
£51.59
Sale price £51.59
Secure Transaction
Excellent
Free UK delivery of orders over £50
Order within , for delivery by tomorrow, April 27.
As seen in
Featured in Daily Mirror, Yahoo, Daily Mail, Metro, Healthline and NBC
See full range

Klaire Labs 5-HTP 100 mg supplies L-5-hydroxytryptophan extracted from the seeds of Griffonia simplicifolia, a West African shrub that is the standard natural source of this amino acid. Klaire Labs, part of SFI Health, has produced hypoallergenic practitioner formulas since 1969. This bottle contains 100 vegetarian capsules, each delivering 100 mg of 5-HTP.

Key features

  • 100 mg L-5-hydroxytryptophan per capsule from Griffonia simplicifolia seed extract
  • 100 vegetarian HPMC capsules
  • Minimal excipients: microcrystalline cellulose, L-leucine and silicon dioxide
  • Free from milk, egg, fish, shellfish, tree nuts, peanuts, wheat, gluten, soy, corn and yeast
  • No artificial colours, flavours or preservatives; non-GMO; suitable for vegans
  • A higher-strength option for practitioners who require 100 mg per capsule

5-Hydroxytryptophan is a naturally occurring amino acid and the direct metabolic intermediate between L-tryptophan and serotonin. Griffonia simplicifolia seed is the usual botanical source. There are no authorised EFSA health claims for 5-HTP; Klaire Labs offers it as a single-ingredient amino acid for use under professional direction.

Directions

Adults: take 1 capsule, 1 to 2 times daily, or as directed by a healthcare professional. Children: as directed by a healthcare professional.

Important information

May cause drowsiness; use caution when driving or operating machinery. Consult your doctor before use if pregnant or breastfeeding, if you have a medical condition, or take any medication, particularly medicines that affect mood. Not for under-18s without professional advice. Food supplements should not be used as a substitute for a varied, balanced diet and a healthy lifestyle. Do not exceed the stated dose. Keep out of reach of children.

L-5-Hydroxytryptophan (5-HTP) (Griffonia simplicifolia seed extract) 100 mg; microcrystalline cellulose, vegetarian capsule (hydroxypropyl methylcellulose, water), L-leucine, silicon dioxide.

GTIN
828054011229
Manufacturer
Klaire Labs
Size
100 Capsules
Best buy
6 to 24 months+

United Kingdom & Rest of the World Shipping Details:
Same day dispatch for orders placed by 2pm (Orders after 2pm dispatched next working day).

Free shipping on orders over £50 to the UK.

Returns: Our products are meant to make you feel healthy and at your best. If you need to return your item, you can do so free of charge within 14 days in the same original and unopened packaging. Subject to T&C's.

Welzo is a UK-based health platform. Orders ship from the UK.

Please consult the product packaging for accurate instructions on how to use the product.

Nutritional Information

Serving size: 1 capsule  |  Servings per container: 100

Per servingAmount%NRV*
L-5-Hydroxytryptophan (5-HTP) (from Griffonia simplicifolia seed extract)100 mg†

*NRV = Nutrient Reference Value. † NRV not established.

Other ingredients: Microcrystalline cellulose, vegetarian capsule (hydroxypropyl methylcellulose, water), L-leucine, silicon dioxide.

Allergen information: Free from milk/casein, egg, fish, shellfish, tree nuts, peanuts, wheat, gluten, soy, corn and yeast. No artificial colours, flavours or preservatives. Non-GMO. Suitable for vegans.

Klaire Labs was founded in 1969 in the United States as one of the first hypoallergenic supplement companies, created to serve people with sensitivities who needed formulas free from common allergens and unnecessary excipients. Today the range is produced by SFI Health in cGMP-certified facilities, with raw-material identity and purity testing and a practitioner-only heritage that has kept its formulations clinically focused rather than trend-led. That transparency-first philosophy, where every active and every excipient is declared and the simplest effective formula is preferred, is exactly the approach Welzo looks for. Welzo's healthcare professionals assessed the brand for alignment with our standards and found its labelling, allergen controls and manufacturing documentation consistent with our commitment to clear, quality-led nutrition. Klaire Labs 5-HTP 100 mg earns its place in Welzo's amino acid range through clean sourcing and honest labelling. The 5-HTP is extracted from Griffonia simplicifolia seed, the recognised botanical source, and the amount per capsule is stated plainly rather than hidden in a proprietary blend. The capsule carries only three excipients and is free from the allergens, yeast, corn and GMO ingredients that practitioners most often need to avoid, and the label carries clear drowsiness and medication cautions. The 100 mg strength gives practitioners a straightforward single-capsule option, which reinforces our trust in their quality philosophy.

Part of the Welzo System™

Test, supplement, enhance, and move, all in one place.

30-Day Money Back Guarantee
GMP Certified Facilities
Third-Party Tested
Vegan & Non-GMO
Rated Excellent
by 30,000+ Positive ReviewsTrustindex verified
Rated 4.8/5 by 27,000+ Customers
UKAS Accredited Labs
Free Next-Day Delivery Over £50
Science-Backed Formulations

Frequently Asked Questions

Everything you need to know about this product.

Third Party Tested
Trusted by 200,000+ Customers
Pharmaceutical-Grade Quality
UK-Based Customer Support