Page 1 - Reviews - Source Naturals, L-Tryptophan, 90 Tablets - iHerb
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Customer Ratings & Reviews

100% authenticOur products are sourced directly from brands or authorised distributors.Show more
4.6
Based on 230 ratings
183
24
14
7
2
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What customers say
(12)
 
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Rating

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English (UK)
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English (UK)
Translated reviews
iHerbCustomer
Silver
Posted on 12/11/2025
Japan
287
28
0
21
Perfect
Verified Purchase
Excellent quality, amazing ingredients, for daily use and adulthood, perfect composition, does not harm your health, best cost-benefit ratio, practical and safe packaging, the package arrived well packaged, I highly recommend this product for you and your family, I have never tried anything like it and you should too, neutral flavor, blackberry, size, lip, moisturize, dry SPF, aroma, even sensitive skin, no need to worry, use frequently, energy, flushing with niacin, potency effect, nervous system, metabolism, deficiency, supplement, symptom, scalp, protein, diet, training, muscle
Auto-translated from Portuguese
iHerb Customer
Silver
Posted on 10/11/2025
South Korea
202
0
0
18
Lately, I've been having a lot of light sleepers and tossing and turning, so I tried taking a supplement containing tryptophan.
Verified Purchase
Lately, I've been having trouble sleeping and tossing and turning, so I tried a supplement containing tryptophan. After taking it consistently for a few days, I've noticed a noticeable improvement in the quality of my sleep and less early morning awakenings. The capsules are a good size, making them easy to swallow, and the quality is clean, with no odor or unpleasant aftertaste. I take one before bed without any worries, so I've been taking it consistently.
Auto-translated from Korean
iHerb Customer
Silver
Posted on 18/07/2026
South Korea
148
0
0
0
The packaging was neat and well-sealed, making it convenient to store.
Verified Purchase
The packaging was neat and well-sealed, making it convenient to store. I also liked that the capsules remained intact even after opening. Above all, I am most satisfied with the fact that I can easily manage my health just once a day. I plan to repurchase this product to continue taking it regularly and maintain my condition. Overall, I am satisfied with the product in terms of quality and ingredients.
Auto-translated from Korean
Sunee
Silver
Posted on 27/03/2026
Thailand
104
0
0
2
Verified Purchase
This is a good supplement. It's supposed to help me sleep better or not, I'm not so sure. But I have no allergic reaction to it.
Auto-translated from English
iHerb Customer
Posted on 4/11/2025
Brazil
21
0
0
0
Verified Purchase
Excellent additive, good quality, good price and good packaging, I recommend you to buy
Auto-translated from Korean
iHerb Customer
Posted on 26/07/2025
Saudi Arabia
93
0
0
60
Verified Purchase
Excellent quality, natural ingredients, sufficient quantity, protein suitable for athletes, tightly sealed package
Auto-translated from Arabic
iHerb Customer
Posted on 7/11/2025
Saudi Arabia
89
0
0
1
Verified Purchase
The quality and ingredients are excellent, and the quantity is excellent compared to the price. Usage: One tablet two hours before bedtime.
Auto-translated from Arabic
iHerb Customer
Silver
Posted on 8/07/2026
South Korea
195
0
0
5
I always eat it.
Verified Purchase
If you have trouble sleeping, make sure to take this. Highly recommended lol. It works well.
Auto-translated from Korean
iHerb Customer
Posted on 29/06/2026
South Korea
64
0
0
4
I bought this because I heard it helps with sleep.
Verified Purchase
I'm taking it because I heard it helps with sleep.
Auto-translated from Korean
iHerb Customer
Posted on 24/01/2026
South Korea
7
0
0
0
Verified Purchase
Excellent additive, good quality, good price and good packaging, I recommend you to buy
Auto-translated from Korean