5.0
verified purchase
this is a good product. I will buy again. Reasonable price
4/16/2026
Dietary Supplement Hypoallergenic L-Tryptophan is the essential amino acid that acts as a precursor to 5-HTP, serotonin, melatonin, and niacin. Tryptophan assists with normal sleep patterns, mood, and appetite. Use with care when combining with SSRI’s, or other substances that increase serotonin levels.
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Dietary Supplement Hypoallergenic L-Tryptophan is the essential amino acid that acts as a precursor to 5-HTP, serotonin, melatonin, and niacin. Tryptophan assists with normal sleep patterns, mood, and appetite. Use with care when combining with SSRI’s, or other substances that increase serotonin levels.
- SKU
- 3-54204
- Brand
- Metabolic Maintenance
- Category
- health / supplements / categories / brain-cognitive
- Variants
- 1
Customer reviews
5.0
verified purchase
No complaints
Good brand, glass bottle, and minimal filler ingredients. Since collagen doesn’t have tryptophan, I take this alongside so as not to create an imbalance. No noticed side effects.
2/8/2026
5.0
verified purchase
Great
I adore it finshed 3 bottles really helped me in sleeping deeply and feeling calm also love that it’s in dark glass bottle
1/12/2026
4.0
verified purchase
Good brand
It's one of the amino acids my body needs according to my bloodwork so I am taking one a day recommended by my FN
11/29/2025
5.0
verified purchase
Excellent quality!
This made a massive difference in my mood overall, having gut issues and using this really gave my mood a good lift and the size is great and the ingredients are minimal and clean as well.
11/20/2025
5.0
verified purchase
최고!
The product fully corresponds to the characteristics indicated on the packaging!, 10/10!
10/30/2025
5.0
verified purchase
Good
Good quality supplement. I take this every other day or so
8/24/2025
5.0
verified purchase
Metabolic Maintenance, L-Tryptophan
This is a great product - taken once or twice daily - especally good beore bedtime for relaxation.
7/19/2025
5.0
verified purchase
Good
I definitely started to sleep better, combining this with magnesium + my mood is getting better during the day. Not that I had an issue, but still feeling more light and fun
7/18/2025
5.0
verified purchase
great
One of my favorite products on iHerb. I have benefited from it and love it very much.
6/1/2025
