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Source Naturals

L-Tryptophan with Coenzyme B-6, 60 Tablets

4.5 · 998 reviews
1,319 ₽

Dietary Supplement Mood Enhancement and Sleep 500 mg The essential amino acid L-tryptophan helps support relaxation, restful sleep, and a positive outlook. It plays a part in the synthesis of both melatonin and serotonin, hormones involved with mood and stress response. This tryptophan includes the activated coenzyme form of vitamin B-6, called P-5-P, that is required to convert tryptophan to serotonin. L-Tryptophan also supports immune functions because it is the body's precursor to the kynurenines that regulate immunity. If needed, L-tryptophan converts to niacin in the body, which supports circulation, a healthy nervous system, the metabolism of food, and the production of hydrochloric acid for the digestive system. Source Naturals L-Tryptophan is extremely pure and is regularly tested to ensure the highest standards of quality.

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Dietary Supplement Mood Enhancement and Sleep 500 mg The essential amino acid L-tryptophan helps support relaxation, restful sleep, and a positive outlook. It plays a part in the synthesis of both melatonin and serotonin, hormones involved with mood and stress response. This tryptophan includes the activated coenzyme form of vitamin B-6, called P-5-P, that is required to convert tryptophan to serotonin. L-Tryptophan also supports immune functions because it is the body's precursor to the kynurenines that regulate immunity. If needed, L-tryptophan converts to niacin in the body, which supports circulation, a healthy nervous system, the metabolism of food, and the production of hydrochloric acid for the digestive system. Source Naturals L-Tryptophan is extremely pure and is regularly tested to ensure the highest standards of quality.

Customer reviews

5.0
verified purchase

Stomach mouth open Tryptophan modified in intestine to melatonin 200 times better than taking melatonin, which help in sleep and help to CLOSE STOMACH MOUTH after 10 years of suffer of this problem. I took with this medicine Apple vinegar and Vitamin D3. I used to take 1 tablet each night 1-.5 hour before sleep to enhance moth stomach to back at its nature. Also it help me sleep deeply, also I slept earlier and darker at medicine period. Each review take long time for me and write it after try and deep study, so if you think this review is helpful Please LIKE 👍🏻🤗

2/19/2021
5.0
verified purchase

I've tried around six different L-Tryptophan pills so far. I got this one because I liked the brand and the inclusion of B-6, which I've noticed improves the workability of L-Tryptophan in the past. I'm approximately 180 pounds and take two pills a night, along with 5mg of Melatonin. I've had a better night's sleep and haven't been groggy in the morning. This is the brand that I will continue to use. It appears like I am falling asleep more quickly.

3/25/2022
5.0
verified purchase
L-Tryptophan with Coenzyme B-6

The quality of this supplement is excellent. It’s made with high-quality ingredients, and I appreciate that it’s free from artificial additives, gluten, and preservatives. The capsules are easy to swallow, and the dosage is clearly labeled on the packaging. I also appreciate that this product comes from a trusted brand that focuses on high standards for purity and potency, ensuring that I’m getting a reliable supplement.

11/16/2024
5.0
verified purchase
medium thinner size tablets

i have been using tryptophan for 3 years. mainly to help sleeping. But now I know how to use it more and cud use it to calm my moods. the idea is to use less instead of more. for sleeping i use 500 to 1000 mg. for calming i will take 150 to 250mg a few times a day. taking more actually will make me sleepy during the day

4/4/2026
5.0
verified purchase
Sleep aid

Sleeping much better with it. So glad I discovered it

2/26/2026
5.0
verified purchase
Прекрасно!

Thank you very much for this product, it suited me, I like the packaging, comfortable and stylish, I will order more of these products, and recommend them to all my friends and relatives! good!!

10/21/2025
5.0
verified purchase
Sleep!

For years I woke in the middle of the night, up for hours. No longer. 95% of the time 1500 mg of this does the trick.

10/16/2025
5.0
verified purchase
L - tryptophan

Good quality ingredients sim biotic with us, antioxidant x 2, tryptophan will works like serotonin

9/29/2025
4.0
verified purchase
Good

Used this to improve my sleep to have more energy, quality was good but felt I had to take for more time to feel results since didn’t feels many benefits, taste was Ok

9/9/2025
5.0
verified purchase
Restful Sleep and Relaxation Support

Combines L-tryptophan with vitamin B6 for better absorption, helping promote calmness and improve sleep quality, with tablets that are easy to include in an evening routine for consistent, gentle results

8/15/2025