Customer Ratings & Reviews

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4.7

Based on 1,421 ratings

1,128

194

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What customers say

(1,412)

iHerb customer

Posted on Oct 13, 2025

United States

Awesome

Verified purchase

This is a great quality product, with good ingredients.I just started taking recently as I have a shortage of b 1. It is essential vitamin and has great health benefits.

iHerb customer

Silver

Posted on Sep 6, 2025

United States

123

Verified purchase

Benfotiamine is a form of vitamin B1. It is essential for your nervous system and beneficial form many organs and organ systems. It is good for heart and improves sleep.

iHerb customer

Posted on Sep 30, 2025

Spain

Perfect

Verified purchase

Fat soluble form of vitamin B1. High quality supplement from a reputable company, small size tablet and easy to swallow, and effective for a multitude of benefits including consistent blood sugar making a useful supplement for diabetics, also especially useful for neuropathy, or if you have a B1 deficiency. Highly recommended!

iHerb customer

Posted on Sep 8, 2025

Bahrain

A Game-Changer for Nerve & Metabolic Support

Verified purchase

After struggling with occasional tingling in my feet and sugar cravings, my functional medicine doctor recommended Source Naturals Benfotiamine. I’ve now been taking it daily for 3 months — 120 tabs lasted me a full 4 months at 1 tablet per day — and the results have been impressive. ✅ What I Love: - Noticeable reduction in nerve discomfort within 6 weeks - Better blood sugar stability — fewer spikes and crashes after meals - High-potency formula (150mg per tablet) — more bioavailable than regular B1 - Easy-to-swallow tablets with no aftertaste - Trusted brand (Source Naturals has solid quality control) - Great value — 120 tablets = 4 months of support Benfotiamine is a fat-soluble form of vitamin B1 (thiamine), which means it’s absorbed better and stays in your system longer. It’s especially helpful for supporting healthy nerve function and glucose metabolism — exactly what I needed. ⚠️ A Few Notes: - Not a quick fix — give it 4–8 weeks to notice changes - Best taken with meals for optimal absorption - Consult your doctor if you’re on other meds I’ve tried other benfotiamine brands, but Source Naturals consistently delivers clean ingredients and noticeable results. No fillers, no unnecessary additives — just the potent nutrient you need. If you’re dealing with nerve discomfort, metabolic concerns, or just want to support healthy aging — this is a supplement worth trying. I’m reordering today! Highly recommended. 👏 — Verified Purchaser, 50s, proactive about metabolic health

iHerb customer

Posted on Apr 7, 2026

United States

Good form of B1

Verified purchase

Source Naturals Benfotiamine has noticeably boosted my energy and improved digestive motility. The ingredient, benfotiamine, is a highly bioavailable form of vitamin B1 that supports healthy glucose metabolism and helps protect against oxidative stress. I appreciate the quality of Source Naturals’ formulation - free from common allergens and manufactured under strict standards.

iHerb customer

Gold

Posted on Mar 13, 2026

Singapore

1,765

Verified purchase

I've been taking this Source Naturals benfotiamine for a few months now, and it's been wonderfully effective for supporting my nerve health. The 150 mg tablets are easy to swallow, and I haven't experienced any stomach upset. Since starting them, I've noticed improved comfort in my feet and more stable energy throughout the day. I appreciate that Source Naturals uses high-quality, science-backed ingredients. A trusted product for nerve and metabolic support.

iHerb customer

Silver

Posted on Feb 11, 2026

Korea, Republic of

108

Verified purchase

The packaging is just wonderful! It's incredibly comfortable. The size and ingredients are completely harmless, which is very pleasing. The result is noticeable in a short time! The taste is neutral, which allows you to use the product in a variety of recipes. I really like making orders on your website. The quality of the goods is always at the highest level, delivery is fast, and the ingredients are selected. The package size is compact, which makes it convenient to store. Overall, the quality is top five!

Gold

Posted on Dec 17, 2025

Singapore

7,041

870

Verified purchase

This benfotiamine has been a simple and effective addition to my routine for supporting overall nerve and metabolic health. The 150mg tablets are easy to take, and I appreciate that this form of vitamin B1 is known for its superior bioavailability. While the benefits are more about long-term wellness than immediate effects, I trust Source Naturals for providing a quality, straightforward product. The 60-count bottle offers good value and fits seamlessly into my daily regimen.

Mommabeam

Posted on Mar 5, 2025

United States

Used for a short time

Verified purchase

I'm taking EOD b12 injections and needed to up my other supplements to counter act that. They seem to work well, helped balance my needs. I didn't take them for long, because I changed my supplement regiment. This seemed like a quality brand, there was no taste, the pills were dosed/ sized well so I didn't have to take a lot of it.

iHerb customer

Silver

Posted on Jan 30, 2025

United States

266

180

Benfotiamine

Verified purchase

The Benfotiamine Tablets are great in a way that it can be split in two if needed. There's no or a bit of bitter-ish taste to it. B1 is a must vitamin for adrenals. This form of B1 has benefit of faster absorption. Tablet is white and small. Great that it doesn't have any coloring. Thanks for caring this vitamin!

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