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Customer Ratings & Reviews

100% authenticOur products are sourced directly from brands or authorized distributors.Show more
4.6
Based on 1,130 ratings
890
111
72
29
28
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What customers say
Customers have mixed experiences with this thyroid supplement. Many users report increased energy levels, improved focus, better sleep, and enhanced overall thyroid function. Some also note benefits for metabolism and weight loss when combined with a balanced diet and exercise. The product is praised for its good quality, comfortable capsule size, lack of taste, and being easy on the stomach. However, a few customers did not notice any significant changes or improvements in their condition. Packaging is generally well-received for its size and freshness. Some users recommend caution when taking it without a prescription.
Review highlights
Customer reviews (1,123)
Product reviews solely reflect the views and opinions expressed by the contributors and not those of iHerb. iHerb does not verify or endorse any claims made in these reviews. Statements regarding dietary supplements have not been evaluated by the FDA and are not intended to diagnose, treat, cure, or prevent any disease or health condition.
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Reviews from Singapore
Reviewer Country
English
Translated reviews
g
Gold
Posted on Jul 21, 2025
Singapore
7,041
0
0
965
Verified purchase
Absolute Nutrition Thyroid T-3 has been a reliable support for my energy and metabolism—noticeable difference in my stamina throughout the day. Appreciate the clean formula without unnecessary additives. Easy-to-swallow capsules with no weird aftertaste. A solid choice for thyroid wellness!
iHerb customer
Posted on Aug 17, 2025
Singapore
3
0
0
2
Hypothyroidism improved significantly
Verified purchase
This has been a game changer for me . I’ve struggled with hypo thyroidism for a long time and I added this to my routine and my thyroid is now in the normal range. I take the full recommended doe of 6 per day but I stack on . Ie one at a time if not it makes me feel a bit dizzy. I have lost some weight but not sure if it’s this or the overall all calorie deficit diet I’m on ! Definately a quality product and well worth the price
iHerb customer
Posted on Mar 23, 2026
United Kingdom (UK)
21
0
0
2
T3 Thyroid
Verified purchase
My energy levels have been at an all time low for me, for over 3 months. I would say 5 days after starting these I felt a bit more balanced overall I love that they contain Ashwagandha. The metabolic support is subtle, but I did feel slightly more active and engaged. Pleased with the start
SaraO
Posted on Apr 1, 2025
United Arab Emirates
551
0
0
57
Verified purchase
I bought this for my husband, along with Ashwaghandah and both seems to reduce his stress levels and boost his energy
iHerbCustomer
Gold
Posted on Jun 26, 2024
Philippines
6,135
3
2
290
Flavor Satisfaction 😍
Verified purchase
Thank you for your outstanding supplements! The quality is top-notch, with carefully selected ingredients that deliver exceptional benefits. Your products have truly made a positive difference in my health and well-being. Nice packaging too, iHerb!
iHerb customer
Posted on Sep 5, 2026
United Kingdom (UK)
43
0
0
5
Thyroid T-3 caps
Verified purchase
My energy levels have been at an all time low for me, for over 3 months. I would say 5 days after starting these I felt a bit more balanced overall I love that they contain Ashwagandha. The metabolic support is subtle, just hoping I feel slightly more active and engaged.
iHerb customer
Posted on Aug 8, 2026
United Kingdom (UK)
24
0
0
0
Benefits of Thyroid T-3
Verified purchase
Real lack of energy far too often, and not right at my age. Still under 50. As Thyroid function is closely linked to energy levels I am trying these from Absolute Nutrition. They do a 180 size better for value but as this is my first time Im giving them a trial
iHerb customer
Posted on Apr 25, 2025
United Kingdom (UK)
243
0
1
10
Benefits of Thyroid T-3
Verified purchase
Thyroid function is closely linked to energy levels, and the supplement seemed to reduce feelings of fatigue, especially in the afternoons. I also felt a bit more balanced overall, which could be due to the stress-supportive ingredients like Ashwagandha. The metabolic support is subtle, but I did feel slightly more active and engaged, which is helpful for staying motivated with daily activities and fitness routines.
marianne
Posted on Jan 29, 2025
France
25
1
0
12
hypothyroidism
Verified purchase
I took this brand in complément with my hypothyroidism medication to help settle it and boost up my T3 levels .it worked a treat as well I the T3 supp that the para pharmacy u mix me up and make me pay so much for ...the quality is great .tasteless tabs I took in the morning with clean ingredients. no taste and good size pack for the money .I recommend this product .
MarikaK
Posted on Nov 24, 2024
Ireland
18
0
0
19
T-3 is a little confusing
Verified purchase
As I have hypothyroidism and extremely high tsh together with slightly low t3 I kind of hoped that this supplement would help me with t3 but it has nothing to do with t3 really, maybe it helps with metabolism, early to say. But I bought it together with other thyroid supplement that has L-tyrosine in it and both supplements say to take 2 caps a day. For me personally this amount that 2 capsules give l-tyrosine, even 300mg as comes with this supplement, is too much. I get buzzy feeling in my brain. I've tried L-tyrosine separately before 500mg a day and after started to get buzz in my brain, i took it every second day and felt okay. Same with this sullpement, as I bought other thyroid supplement as well, so I take actually one capsule of each, thisone one day, the other second day and I feel grand. No weird side-effects. First when got these supplements took as told on backet, but as soon I've got this buzz in my head, I realised that this is too much L-tyrosine for me, reduced doses and feel fine. I can say from my own experience that taking L-tyrosine on it's own nearly a year, it didn't made any difference on my t3 and t4 blood result, also nothing changed on TSH, so I have no idea if this supplement has much effect on thyroid in case of this, but I feel my head has less brainfog, so this is already helpful enough to keep going taking this supplement and hopefully the other incredients that are in it are good overall for body. Weight loss as it also promises is early to say as I only started to take this supplement.