Page 1 - Reviews - Life Extension, Optimized Tryptophan Plus, 90 Vegetarian Capsules - iHerb
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Customer Ratings & Reviews

100% authenticOur products are sourced directly from brands or authorized distributors.Show more
4.7
Based on 1,561 ratings
1,227
203
87
19
25
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What customers say
Customers report significant improvements in sleep quality and ease of falling asleep after using this supplement, with many experiencing benefits within a few days. The product is praised for its high-quality ingredients and effectiveness in promoting relaxation and mood stability. Some users noted immediate calming effects and increased energy levels. Delivery was generally fast, with some appreciating the tracking feature. A few customers mentioned that the supplement helped manage depression and anxiety without adverse effects. However, there were isolated complaints about the necessity of taking multiple capsules for desired dosage and comparisons to other brands. Overall, the supplement is well-received for its role in enhancing sleep and mood.
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iHerb customer
Posted on Aug 19, 2021
Canada
3
0
1
0
Verified purchase
Been using these for a few months; have great difficulty getting to, & staying to sleep & these help. They are also much easier to swallow than NOW's large, rigid tabs.
iHerb customer
Silver
Posted on Jan 28, 2023
Canada
142
0
2
7
Verified purchase
I take this to help with depression. Seems to be helping so far.
MariaStella
Silver
Posted on Oct 19, 2024
Malaysia
115
102
1
34
Stress free
Verified purchase
A lack of sleep can cause stress, and stress can lead to a lack of sleep. Break the cycle and support healthy sleep with our Optimized Tryptophan Plus. It provides 1,000 mg of L-tryptophan that has undergone rigorous manufacturing processes to ensure quality and purity. Optimized Tryptophan Plus supports healthy sleep patterns and helps modulate the biological response to stress. Optimized Tryptophan Plus Benefits Supports healthy sleep & mood by maintaining healthy tryptophan levels Helps modulate your biological response to stress Promotes satiety for healthy weight management Includes nutrients to encourage healthy tryptophan activity Optimized Tryptophan Plus is made with high-quality L-tryptophan, as well as nutrients such as lysine, niacinamide and more to help maintain healthy tryptophan activity in the body.
296c94d7-3de0-4e9c-a178-168eef304006
iHerbCustomer
Gold
Posted on Mar 18, 2026
Philippines
6,135
3
2
256
Verified purchase
Thank you for providing such outstanding supplements! The quality is exceptional, with thoughtfully selected ingredients that offer remarkable health benefits. Your products have made a significant positive impact on my overall well-being. I also appreciate the secure and reliable packaging. Thanks again, iHerb!
Hawazen
Posted on Feb 3, 2026
Saudi Arabia
80
3
1
3
Прекрасно!
Verified purchase
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!!
iHerbCustomer
Posted on Feb 2, 2026
Saudi Arabia
70
3
1
16
Good
Verified purchase
The quality and the packaging of the product is good, the size of the tablet quite large, no smell, but it didn't work that much.
iHerb customer
Posted on Oct 6, 2025
Jordan
37
0
1
15
Calmer Mood and Deeper Sleep
Verified purchase
I started taking this a few weeks ago, and it’s really helped me feel calmer and more at ease. My sleep has improved — I fall asleep faster and stay asleep longer without feeling heavy or groggy in the morning. It works gradually but feels very natural, and I like that it supports both mood and rest at the same time.
iHerb customer
Posted on Nov 10, 2024
Oman
7
0
0
1
Surviving motherhood
Verified purchase
It makes really a huge difference when I take this or not. During the first 2 years of my baby I’m not sleeping with a healthy cicle because baby feeding at night. When taking tryptophan with magnesium and b1 I could wake up being a human and not a walking dead ! All moms knows what I’m talking about!
iHerbCustomer
Silver
Posted on May 25, 2025
Bahrain
257
12
0
13
Mum no sleep
Verified purchase
She started taking this during stressful nights and noticed better sleep. The capsules are easy to swallow and high quality. Great ingredients and size—perfect support during busy weeks!
iHerb customer
Silver
Posted on Oct 21, 2025
Singapore
297
0
0
53
Verified purchase
I've struggled with occasional sleeplessness and a racing mind at night for years. A friend recommended I try tryptophan, and this specific formula has been a game-changer. I take one capsule about 30 minutes before bed, and it gently helps me unwind and fall asleep naturally. I wake up feeling truly rested, without any of the grogginess I've experienced with other sleep aids. It's become an essential part of my nightly routine for maintaining a positive mood and restful sleep.