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Swanson Vitamins

L-Tryptophan, 500 mg, 60 Capsules

4.7 · 954 reviews
1,454 ₽

Sleep Support Dietary Supplement Encourages Healthy Sleep Patterns Helps Regulate the Body's Circadian Rhythm Supports Healthy Serotonin Levels Helps Combat Jet Lag Science-Backed Quality Since 1969 Vegan Gluten Free Dairy Free Non-GMO Looking for effective sleep support? Swanson L-Tryptophan offers 500 mg of L-tryptophan per capsule to help support healthy serotonin levels and provide restful sleep. L-tryptophan, an essential amino acid, has to be obtained in the diet or in supplement form. Extensive lot tests indicate no Peak-E in this product.

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Sleep Support Dietary Supplement Encourages Healthy Sleep Patterns Helps Regulate the Body's Circadian Rhythm Supports Healthy Serotonin Levels Helps Combat Jet Lag Science-Backed Quality Since 1969 Vegan Gluten Free Dairy Free Non-GMO Looking for effective sleep support? Swanson L-Tryptophan offers 500 mg of L-tryptophan per capsule to help support healthy serotonin levels and provide restful sleep. L-tryptophan, an essential amino acid, has to be obtained in the diet or in supplement form. Extensive lot tests indicate no Peak-E in this product.

Customer reviews

5.0
verified purchase
Precursor of Serotonin and Melatonin

This amino acid is soooo sooo important!!! L-Tryptophan is a precursor of serotonin and also melatonin. If you have an L-tryptophan deficiency, your sleep will also be disrupted. So it affects my sleep-wake rhythm, my mood, and my tolerance for stress and pain. Very important building block in my body. I hope my review is helpful! Good health

2/7/2025
5.0
verified purchase
quick result

I've been pretty irritable lately and I can't figure out why. but when I came across an article about this drug, everything fell into place. I take it before going to bed and the result became visible in three days, I fall asleep immediately, plus I became much calmer and began to react less emotionally to situations. I will definitely take it to get drunk on the courses

2/11/2024
5.0
verified purchase
Great product!

I’ve never ordered this type of supplement before so I wasn’t sure what to expect. I ordered it because I had sleep issues. It seems to be a quality product. The size of the package ( bottle) was bigger than I expected. There was no bad taste. The product worked well for me and I think the ingredients are good quality. I’d order it again.

7/18/2025
5.0
verified purchase
Helps with sleep and mood — gentle but effective

I've been taking Swanson L-Tryptophan (500 mg) for a few weeks now, and it’s been a great natural support for better sleep and a more stable mood. I usually take one capsule about 30–60 minutes before bed, and it helps me relax and fall asleep more easily — without feeling groggy the next morning. It also seems to have a subtle positive effect on my overall mood during the day. I feel a bit calmer and more balanced, especially during stressful periods. The capsules are easy to swallow and I haven't had any side effects. 60 capsules per bottle is a solid value, especially for a supplement that actually works gently and naturally.

7/9/2025
5.0
verified purchase
Thanks for the good night's sleep!

This L-tryptophan supplement really produces an increase in feeling sleepy and shortens the time to get to sleep for me dramatically. I found that it REALLY works for me! Thoroughly recommmended ... quality ingredient!

1/31/2025
5.0
verified purchase
It works best when taken at evening

I use tryptophan for the first time and I have noticed that it may have an effect with sleep quality. The main ingredient, tryprophan is said to affect in serotonin levels, so it may have an effect with mood. The size of the capsule seems average, it's easy to swallow in my opinion.

6/8/2024
5.0
verified purchase
Really good

Has been working well and I've noticed a difference. The price was excellent as well.Great for mood support as it boosts serotonin levels to combat anxiety, and depression.

7/29/2026
5.0
verified purchase
Great quality

I’ve been taking this together with a few other supplements, so it’s difficult to say which effects come specifically from L-tryptophan. However, I’ve been feeling good overall, and the capsules are easy to swallow. The product arrived well packaged and the quality seems great. I’ll continue using it.

7/2/2026
5.0
verified purchase
Awesome to take before bed

Swanson is one of my go-to brands, and this tryptophan does not disappoint. I started taking it before bed and before magnesium. The effect on my sleep and mood the next day has been apparent. I thought about buying powder in bulk to save money but read reviews stating that tryptophan powder can have a pungent scent. This Swanson brand has no scent, and the capsule size isn't too big. Overall, the quality is high enough that I'll be sticking with this brand since the benefit is enough that it's not worth testing other brands.

2/20/2026
5.0
verified purchase
great

good quality, good ingredients, good size, no taste, good packaging, good for the diet, good benefits, good composition, good for trainings and muscles, good for energy leves in body, good for protein intake, overall i can say it is just great and u should go buy it tbh, a good good supplement for y

1/17/2026