Page 1 - Reviews - Theralogix, Thera-D 4000, 90 Tablets - iHerb
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Customer Ratings & Reviews

100% authenticOur products are sourced directly from brands or authorised distributors.Show more
4.8
Based on 17 ratings
15
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2
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What customers say
(14)
 
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English (UK)
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Anna
Gold
Posted on Feb 8, 2026
United States
675
0
10
12
Verified Purchase
This vitamin D is often chosen for a sense of stability and a more balanced well-being throughout the day. Many report slightly increased energy and a more stable overall state, especially during periods of low sun exposure. The tablets are small, flavorless, and easy to take. The formula is simple and straightforward, without unnecessary ingredients, fitting easily into daily routines.
Auto-translated from Russian
AlinaSergey
Gold
Posted on Jan 9, 2026
Latvia
959
11
35
6,276
One of many D3 variants.
Verified Purchase
I don't like D3 in oil at all. It gives me a bad gastrointestinal sensation. But I drink this version perfectly. I definitely recommend it!!!
Auto-translated from Russian
Dmytro
Posted on Apr 30, 2026
Ukraine
7
0
0
1
The best D3 formula
Verified Purchase
I would simply say, this D3 is like the Rolls Royce of the vitamin world.
Auto-translated from Ukrainian
HMZ
Silver
Posted on Apr 25, 2026
Saudi Arabia
168
1
31
115
Verified Purchase
A complete and tested product according to the company's statement, and the dosage is suitable for an adult.
Auto-translated from Arabic
iHerbCustomer
Gold
Posted on Jan 27, 2026
Armenia
1,108
0
0
18
Verified Purchase
Vitamin D is often chosen to feel more stable and balanced throughout the day. Many report it helps them maintain energy and a positive mood, especially during periods of low sun exposure. The tablets are small, flavorless, and easy to take without discomfort. The format is simple and straightforward, without unnecessary additives or complex combinations.
Auto-translated from Russian
Inna Borovik
Posted on Jul 4, 2025
Netherlands
149
0
0
2
Verified Purchase
The quality is excellent, the effect is noticeable almost immediately, the capsule size is normal, the dosage is great
Auto-translated from Ukrainian
iHerb Customer
Posted on Jul 7, 2026
Mexico
3
0
0
1
The energy vitamin
Verified Purchase
With this vitamin, I noticed more energy in my daily life and less hair loss. It's worth noting that I also supplemented with vitamin K2, as suggested by my doctor. I bought both vitamins at this store, and they were an excellent investment.
Auto-translated from Spanish
iHerb Customer
Posted on Oct 6, 2025
Czech Republic
9
0
0
0
Great
Verified Purchase
Excellent dosage for countries with low vitamin levels. Natural ingredients.
Auto-translated from Russian
iHerb Customer
Posted on Jul 27, 2026
Mexico
1
0
0
0
Excellent product
Verified Purchase
Very good product, it arrived quickly and feels great; I feel more energetic. Its price is super competitive in the market.
Auto-translated from Spanish
iHerb Customer
Silver
Posted on Apr 30, 2026
Ukraine
212
0
0
17
Verified Purchase
The best vitamins I've ever taken! I really like the effect after taking them! My recommendations are sincere!
Auto-translated from Ukrainian