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Source Naturals

Vitamin B-1, High Potency , 500 mg, 100 Tablets

4.7 · 865 reviews
1,799 ₽

Dietary Supplement Suitable For Vegetarians B-1 is intimately involved in many aspects of nerve health and function. Once in the body, B-1 is activated to a co-enzyme form necessary for energy production and the formation of acetylcholine, a major neurotransmitter. Magnesium plays a role in neuromuscular transmission and activity, and supports muscle relaxation. Excessive alcohol intake may increase the need for B-1, and B-1 may be missing from some diets of highly processed "junk food".

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Dietary Supplement Suitable For Vegetarians B-1 is intimately involved in many aspects of nerve health and function. Once in the body, B-1 is activated to a co-enzyme form necessary for energy production and the formation of acetylcholine, a major neurotransmitter. Magnesium plays a role in neuromuscular transmission and activity, and supports muscle relaxation. Excessive alcohol intake may increase the need for B-1, and B-1 may be missing from some diets of highly processed "junk food".

Customer reviews

5.0
verified purchase
Great product

I have carbohydrates rich diet and don't eat eggs and meat rice and flat bread is my daily meals with some lantis and vegetables. I have increasingly developed this understanding that these are processed foods and often do not contain micro nutrients and these carbs often deplete B1. so if you want to continue your cabs you need allies good vitamin b complex and B1 suppliment. I highly recommend this product. I feel energized.

11/12/2024
5.0
verified purchase

Great quality. Size and package are satisfactory. There’s no taste to it. The pill is kinda big, but easily swallowed. The ingredients have benefited my nervous system health, effected my energy levels. It also helped with my sleep issues. Gonna buy it again once I finish this one.

10/2/2024
5.0
verified purchase
Nerve Health

I’ve been taking Source Naturals High Potency B-1 (500 mg) for a while now, and I’m really impressed with the results. These tablets are easy to swallow and offer a high-quality source of vitamin B1. Vitamin B1, or thiamine, is crucial for converting food into energy and supporting overall nerve function. Since starting this supplement, I’ve experienced increased energy levels and improved mental clarity. It also helps in maintaining a healthy nervous system, which has contributed to better overall well-being and reduced feelings of fatigue. If you’re looking for a potent and effective B1 supplement to boost your energy and support nerve health, I highly recommend Source Naturals High Potency B-1. It’s a reliable product that has made a noticeable difference in my daily life!

8/22/2024
5.0
verified purchase
Sourse Naturals,High Potency B-1

Sourse Naturals, High Potency B-1 impressed me with its quality and clean ingredient profile. The capsule size is comfortable and easy to take. I like that the formula includes folic acid and supports energy without causing niacin flush. The package is convenient and well designed. I noticed a positive effect on the nervous system and overall metabolism. The taste is neutral and not irritating.

2/17/2026
5.0
verified purchase
Прекрасно!

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!!

11/25/2025
5.0
verified purchase
Happy

Very happy with this product! The only thing I would say tablets are a bit big ! They helpful with tingles in the arms ! Does give me energy! I do break in half when take it

11/20/2025
5.0
verified purchase
b1 500 mg per tablet

The dosage of vitamin b1 per tablet is 500mg, which is potent, and the addition of 100 mg magnesium is very helpful. Good for energy production and nervous system.

10/27/2025
5.0
verified purchase
Harika!

Great experience with iHerb. Items were fresh, carefully packed, and delivered on time. I appreciate the quality and fair prices. Definitely planning to order again and recommend to friends.

9/27/2025
5.0
verified purchase
nice

bought this for the energy. Good size easy to swallow also. nicely packagaed

9/23/2025
4.0
verified purchase
High Potency B1

Source Naturals High Potency B‑1 delivers 500 mg of thiamine (vitamin B‑1) plus 100 mg magnesium in each tablet.  It’s vegetarian, free of yeast, dairy, gluten, soy, and artificial colors or preservatives.  Users report noticeable improvements in energy, reduced fatigue, and better nerve function after daily use.  The tablets are large, which some may find harder to swallow.  Good value per dose, especially for those with higher thiamine needs (e.g. after high carb diets, alcohol use, or intense activity). It’s strong, so using with caution and possibly cycling or consulting a healthcare provider is wise. Quality is okay

9/23/2025