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Thorne Research L-Tryptophan

Thorne Research L-Tryptophan
Our Price:  £70.50(Inc. 20% VAT)(£58.75 Exc. VAT)Earn 70 Loyalty Points


Code:  TSA501
Brand:  Thorne Research
Form (e.g. capsules):  Capsules

Thorne Research

Thorne Research L-Tryptophan

Health supplement

 is an essential amino acid which means it cannot be synthesized by the body, but must be obtained from food or supplements.  Food sources include red meat, nuts, seeds, soybeans and soy products, tuna, shellfish, and legumes. 

L-Tryptophan is the pre-cursor to serotonin, melatonin and niacin.  In order to use tryptophan the body also needs sufficient supplies of iron, riboflavin and vitamin B6.

L-Tryptophan is most affective taken along side some carbohydrate (fruit or orange juice) this is because carbohydrates cause the body to release insulin which in turn helps to utilise L-Tryptophan more easily.

Brand Thorne Research
Size 60 Vegetarian Capsules
Recommended Dosage

Take 1-2 capsules twice a day or as recommended by your qualified healthcare practitioner.


Serving Size: Two Capsules: L-Tryptophan (1g)

Free From

This product does not contain wheat, gluten, corn, yeast, soy, egg, dairy products, or artificial colours, artificial sweeteners, or artificial flavours. This product also does not contain lactose, palmitic acid, magnesium stearate, or stearic acid.


Do NOT take if you are on antidepressants or SSRI’s  (selective serotonin reuptake inhibitors). 

If pregnant, consult your health-care practitioner before using this product.

There are no known adverse interactions or contraindications at publication date.

Other Ingredients

Ingredients: Bulking Agent: Microcrystalline Cellulose. Anti-caking Agents: Silicon Dioxide, Leucine. Hypromellose (derived from cellulose) capsule, L-Tryptophan.