Page 1 - Reviews - Life Extension, Optimised Tryptophan Plus, 90 Vegetarian Capsules - iHerb
Your preference has been updated for this session. To permanently change your account setting, go to My Account
As a reminder, you can update you preferred country or language anytime in My Account
> beauty2 heart-circle sports-fitness food-nutrition herbs-supplements pageview
Click to view our Accessibility Statement
}
Free delivery over £29.00
checkoutarrow
Supplements
Sports
Bath & Personal Care
Beauty
Grocery
Home
Baby & Kids
Pets
Brands A–Z
Health Goals
Deals
Bestsellers
New

Customer Ratings & Reviews

100% authenticOur products are sourced directly from brands or authorised distributors.Show more
4.7
Based on 1,574 ratings
1,239
203
88
19
25
Write a review
What customers say
(254)
 
Rating

Rating

Languages
English (UK)
Languages
Show auto-translated reviews(254)
Show reviews with images only
Review images
English (UK)
Translated reviews
Iman
Posted on Sep 1, 2026
United States
8
0
0
0
Good
Verified Purchase
It is good quality ingredients good size good packaging. I use it for sleeping. It makes me relax and I can sleep better and my sleep is deep, which gives me good energy in the morning. It does not have any taste.
Auto-translated from English
Catamine
Posted on May 6, 2026
Ukraine
80
20
0
35
Cinderella's Dream
Verified Purchase
A truly powerful, high-quality product. I take it 30 minutes before bed, no matter how anxious I am. I sleep like a dream and wake up even better. The capsules are large, so it takes some getting used to. I've also noticed a reduction in my sweet cravings.
Auto-translated from Russian
RaykoBelopitov
Posted on May 24, 2026
Bulgaria
26
0
0
4
Premium quality for better sleep and mood
Verified Purchase
I chose Tryptophan from Life Extension, as the brand has proven to invest in research and high quality raw materials. The product feels like a premium supplement – pure composition, no unnecessary fillers and reliable dosage. I chose it because it supports the production of serotonin and melatonin, which is key to good quality sleep. The packaging is excellent, as always with Life Extension. For me, this is the benchmark for a serious supplement brand. I recommend it to anyone looking for quality support for the nervous system
Auto-translated from Bulgarian
Abdullah
Silver
Posted on Mar 30, 2026
Saudi Arabia
111
9
0
100
Very useful
Verified Purchase
This company's tryptophan supplement is well-known among supplement users. Many take it to support relaxation and improve sleep. The capsules are easy to use, and the company's quality is generally good. I didn't notice any unpleasant taste or problems using it. It's suitable for those who prefer relatively clean supplements.
Auto-translated from Arabic
iHerbCustomer
Gold
Posted on Mar 18, 2026
Philippines
6,135
3
2
266
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!
Auto-translated from English
iHerbCustomer
Silver
Posted on Feb 18, 2026
Ukraine
200
0
0
10
Verified Purchase
is a highly effective dietary supplement. It is designed to support good mood, improve sleep quality, reduce stress and anxiety levels. It is a vegetarian product to improve emotional balance.
Auto-translated from Ukrainian
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!!
Auto-translated from English
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.
Auto-translated from English
iHerbCustomer
Silver
Posted on Nov 20, 2025
Kuwait
140
25
5
25
Distinguished
Verified Purchase
The quality is excellent, the ingredients are wonderful, the quantity is large, and the benefit is that it helps you sleep well.
Auto-translated from Arabic
iHerbCustomer
Gold
Posted on Nov 9, 2025
United Arab Emirates
768
1
7
23
amazing
Verified Purchase
Under trial, the ingredients are natural, providing energy, a rich composition, excellent results, and high quality.
Auto-translated from Arabic