Page 1 - Reviews - Superior Source, B-1, 100 Instant Dissolve Tablets - iHerb
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Customer Ratings & Reviews

100% authenticOur products are sourced directly from brands or authorized distributors.Show more
4.5
Based on 334 ratings
248
46
22
7
11
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What customers say
Customers generally find the Vitamin B1 supplement effective and easy to use, particularly appreciating its sublingual form which allows for better absorption. Many users report quick delivery and good packaging. However, a common complaint is the unpleasant taste, described as bitter or even revolting by some. The tablets are noted to be powdery and prone to disintegration when cut, with some customers mentioning they dissolve slowly in a dry mouth. Despite these issues, the product is considered high quality and beneficial for those needing higher doses of B1, including individuals with Parkinson's disease or malabsorption issues. The small size of the tablets is appreciated for ease of use, though some suggest a lower dosage option would be preferable.
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English
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Nutritionist
Gold
Posted on Dec 26, 2023
522
0
1
27
Great
Verified purchase
I like this brand. Good quality. Great form of tablets, they dissolve in the mouth which gives less load on a stomach.
iHerb customer
Posted on Jan 31, 2025
Canada
7
0
0
6
Life Saver — Game Changer
Verified purchase
These have been a life saver for me. I was suffering from b1 deficiency and didn’t know it. These just in a matter of days had me feeling brand new. I wish it came in another flavour like orange bc I hate the tastes of cherries. I just chugged them down with water and I still felt the change. I definitely feel calmer and more energetic. Thank you from the bottom of my heart for making these ♥️
iHerb customer
Posted on Aug 21, 2024
69
0
0
52
Bioavailable sublingual
Verified purchase
A bioavailable form dissolving quickly in your mouth - but tastes terrible! Good quality and works but I find myself taking it with water to get it down quickly! I definitely can’t suck on it as intended. This brand makes a delicious sublingual b12 so not sure why the b1 is so unpalatable. But I keep buying it as it does the job.
iHerb customer
Posted on Jun 19, 2024
Thailand
37
1
3
20
Easy melt
Verified purchase
Recommended to me by people in FB group as good quality vit B1 as it bypass our gut. I have been taking other brand of vit B1 so I really can't say whether this one has had a tremendous effect on me. But the size is good and taste wise I can handle. I actually like the fact that it's not sweet like the other sublingual vit B.
iHerb customer
Posted on May 4, 2026
Germany
1
0
0
0
Masterofdisaster
Verified purchase
Exellent Quality ,great help with Parkinson`s Inexpensive,improves symtoms in Parkinson``s disease
iHerb customer
Posted on Jun 12, 2024
United Kingdom (UK)
1
0
0
1
Excellent
Verified purchase
So easy to divide with your nail if you only need half the dose. Excellent for use with the B1 protocol by Daphne Bryan. Dissolves easily under the tongue.
iHerb customer
Posted on Aug 26, 2025
United States
25
0
0
0
Very unpleasant taste
Verified purchase
The tablets are small and dissolve quickly, but the taste is very unpleasant. And the aftertaste remains for a long time, you need a full glass of water to get rid of it.
iHerb customer
Silver
Posted on Feb 28, 2024
United States
125
0
0
14
Works!
Verified purchase
I take supplements, but don’t often feel a “difference” on them. This B1 I actually can tell the results. It has a bitter medicinal flavor, but you don’t have to let it sit under your tongue. You can just swallow it with food. I started out slowly with just one, but am increasing my dosage over time. I’ve noticed a difference in neuropathy and my knees in just under a month.
iHerb customer
Silver
Posted on Nov 21, 2025
Czech Republic
211
0
0
31
Circumvents malabsorbtion
Verified purchase
Great quality, clean incredients. Dissolve makes size irrelevant and circumvents any intenstinal malabsorption issues.
Oana
Posted on Aug 13, 2025
Switzerland
98
0
2
5
Good
Verified purchase
Use it every day but the taste is not so good..................