Disclosure: We earn commissions on purchases made through our links. This never influences our scores. Editorial policy
Benfotiamine
Bottom line
In our scoring, Benfotiamine rates mixed evidence: the evidence is mixed for delivers more usable thiamine than regular vitamin B1. Our top-scored product is Benfotiamine (83/100), about $0.32 a day at a clinical dose of 300-600 mg/day. Bottom line: promising but not settled, so manage expectations. This is our opinion, not medical advice; talk to your clinician before starting.
Benfotiamine is a fat-soluble form of vitamin B1 (thiamine), and its one genuine, well-established advantage is bioavailability: because it dissolves in fat, it raises thiamine levels in blood and tissue far more than the cheap water-soluble thiamine in most B-complex pills.
- Evidence
- Mixed Evidence
- Category
- Vitamins & Minerals
- Best form
- pure benfotiamine at 300 mg+ per serving
- Effective dose
- 300-600 mg/day
- Lab tested
- 2 of 6 products
- Category
- Vitamins & Minerals
- Best form
- pure benfotiamine at 300 mg+ per serving
- Effective dose
- 300-600 mg/day
- Lab tested
- 2 of 6 products
Key takeaways
- →Its real, proven advantage is bioavailability: fat-soluble benfotiamine raises thiamine levels far more than the cheap B1 in most supplements.
- →Short-term evidence for nerve comfort (best at 600 mg/day) and post-meal blood-vessel stress is decent; the 12-24 month objective-endpoint trials came back flat. Honest picture, not a nerve cure.
- →Buy pure benfotiamine at 300 mg+ per serving. Double Wood (third-party tested, ~$0.32/day) is our Top Pick; Nutricost (~$0.19/day) is the Best Value.
- →Very safe, and a reasonable B1-coverage play for metabolic health - including some GLP-1 users eating less - but that GLP-1 angle is coverage logic, not a proven benefit.
What Is Benfotiamine?
Benfotiamine is a fat-soluble form of vitamin B1 (thiamine), and its one genuine, well-established advantage is bioavailability: because it dissolves in fat, it raises thiamine levels in blood and tissue far more than the cheap water-soluble thiamine in most B-complex pills. That part is not marketing, it is pharmacology. What is less settled is whether that translates into the benefits it is sold for. The honest read: decent short-term evidence for nerve comfort and for blunting the damage that high blood sugar does to blood vessels, but the long-term, hard-endpoint trials have mostly come back flat.
The best evidence is short-term and symptomatic. In the BENDIP trial (Stracke 2008), 600 mg/day improved a neuropathy symptom score over six weeks, while 300 mg/day did not separate from placebo, so dose matters. Mechanistically it is interesting too: benfotiamine activates transketolase, which diverts excess sugar away from the pathways that form advanced glycation end-products (AGEs), and a short trial (Stirban 2006) showed it prevented the spike in blood-vessel dysfunction after a high-AGE meal in people with diabetes. That AGE-and-glucose-metabolism angle is the strongest "why it should work" story.
Now the honest counterweight, because it matters. The longer, more rigorous trials did not find a benefit on objective measures. A 24-month study (Fraser 2012) at 300 mg/day found no effect on nerve function, and the 12-month BOND study (Bönhof 2022) at 600 mg/day found no effect on nerve-fiber measures despite being well tolerated. A kidney trial (Alkhalaf 2010) raised thiamine levels but did not change the clinical outcome. So the fair summary is: benfotiamine may ease nerve symptoms in the short term and has a plausible metabolic mechanism, but it has not been shown to change nerve structure or hard outcomes over a year.
Where it fits the current moment: it is a reasonable, very safe B1-status insurance play for people focused on blood-sugar and metabolic health, including some on GLP-1 medications who are eating less and want to shore up thiamine (a water-soluble vitamin that drops when intake falls). That is a coverage rationale, not a proven GLP-1 benefit. Buy pure benfotiamine at 300 mg or more per serving, and ignore "nerve support" blends that hide a token dose among a dozen other ingredients.
Does It Work? The Evidence
How A-F grades workBenfotiamine earns a Mixed Evidence rating: the research is suggestive but not settled. Its best-supported uses so far are delivers more usable thiamine than regular vitamin B1 and well tolerated and safe (grade A), but the evidence across claims is mixed - each is graded on its own below.
Delivers more usable thiamine than regular vitamin B1
Pharmacokinetic studies consistently show benfotiamine's fat-soluble structure produces much higher blood and tissue thiamine levels than water-soluble thiamine HCl or mononitrate
Well tolerated and safe
Across trials up to 24 months and doses to ~900-1,050 mg/day, benfotiamine has shown no serious adverse-event signal
Eases nerve discomfort in the short term
Stracke et al. 2008 (BENDIP): 600 mg/day improved a neuropathy symptom score over 6 weeks (300 mg/day did not); Haupt et al. 2005: 3-week symptomatic improvement
Reduces AGE-related blood-vessel stress after meals
Stirban et al. 2006: a short course prevented the post-meal drop in endothelial function and rise in oxidative stress after a high-AGE meal in people with diabetes
Improves nerve function over the long term (objective measures)
Fraser et al. 2012 (24 months, 300 mg/day) and Bönhof et al. 2022 (BOND, 12 months, 600 mg/day) both found no significant effect on objective nerve-function or nerve-fiber endpoints
| Grade | Claimed Benefit | Key Studies | Our Verdict |
|---|---|---|---|
| A | Delivers more usable thiamine than regular vitamin B1 | Pharmacokinetic studies consistently show benfotiamine's fat-soluble structure produces much higher blood and tissue thiamine levels than water-soluble thiamine HCl or mononitrate | Supported |
| A | Well tolerated and safe | Across trials up to 24 months and doses to ~900-1,050 mg/day, benfotiamine has shown no serious adverse-event signal | Supported |
| B | Eases nerve discomfort in the short term | Stracke et al. 2008 (BENDIP): 600 mg/day improved a neuropathy symptom score over 6 weeks (300 mg/day did not); Haupt et al. 2005: 3-week symptomatic improvement | Early Signal |
| B | Reduces AGE-related blood-vessel stress after meals | Stirban et al. 2006: a short course prevented the post-meal drop in endothelial function and rise in oxidative stress after a high-AGE meal in people with diabetes | Early Signal |
| B | Improves nerve function over the long term (objective measures) | Fraser et al. 2012 (24 months, 300 mg/day) and Bönhof et al. 2022 (BOND, 12 months, 600 mg/day) both found no significant effect on objective nerve-function or nerve-fiber endpoints | Not There Yet |
How to Choose: Forms, Doses & What Matters
Clinical dose: 300-600 mg/day; the nerve-symptom signal in trials was strongest at 600 mg/day
Best forms: pure benfotiamine at 300 mg+ per serving, BenfoPure (a common branded raw material), avoid B-complex blends that fairy-dust a token 50-150 mg
Take 300 mg per day for general metabolic and B1-coverage use, or 600 mg per day (often split into two doses) if you are targeting the nerve-comfort benefit the trials used. It is fat-soluble, so taking it with a meal that has some fat is sensible. It is water-stable and well tolerated, so timing is flexible and there is no need to cycle. Give the nerve-symptom use a couple of months, since the trials ran six weeks or longer.
Who Should Take Benfotiamine?
This makes sense if you are focused on blood-sugar and metabolic health and want a well-absorbed form of vitamin B1, or if you deal with nerve discomfort and want to try the short-term-supported option (at the 600 mg/day dose the trials used). It is also a sensible, cheap thiamine-coverage choice if you are eating substantially less - for example on a GLP-1 medication - since thiamine is water-soluble and falls when intake drops. It is one of the safer supplements you can take.
Who Should Avoid It?
Not for everyone
Side Effects & Safety
Product Scores
6 products scored on dosing accuracy, third-party testing, cost per effective dose, and label transparency.
The Scorecard: 6 Products Compared
Benfotiamine
Double Wood
$18.95 ÷ 59 days at 300mg/day (1 serving × 300mg)
The best-documented testing of the bunch, which is why it edges out on quality. A clean 300 mg benfotiamine for daily use.
Prices checked 2026-07-05. Cost shown is per clinically effective daily dose, not per pill.
Benfotiamine 300mg
Nutricost$16.97 ÷ 89 days at 300mg/day (1 serving × 300mg)
The value pick: a clean 300 mg benfotiamine at the lowest cost per dose in this comparison.
Prices checked 2026-07-05. Cost shown is per clinically effective daily dose, not per pill.
Benfotiamine 300 with BenfoPure
Doctor's Best$18.49 ÷ 60 days at 300mg/day (1 serving × 300mg)
A well-regarded brand using a named benfotiamine source. Comparable to the top picks on dose and price; slightly behind on documented testing.
Prices checked 2026-07-05. Cost shown is per clinically effective daily dose, not per pill.
Mega Benfotiamine 250mg
Life Extension$19.99 ÷ 100 days at ~300mg/day (1.2 servings × 250mg)
A solid, well-priced option from a quality-focused brand, though the 250 mg dose is a touch below the studied 300 mg.
Prices checked 2026-07-05. Cost shown is per clinically effective daily dose, not per pill.
Benfotiamine 150mg
Source Naturals
$12.98 ÷ 59 days at 300mg/day (2 servings × 150mg)
A cheap, no-frills option, though the 150 mg tablet size means doubling up for a clinical dose.
Prices checked 2026-07-05. Cost shown is per clinically effective daily dose, not per pill.
Benfotiamine 150 + Alpha-Lipoic Acid 300
Doctor's Best$22.99 ÷ 30 days at 150mg/day (1 serving × 150mg)
A reasonable combo if you specifically want both ingredients, but the benfotiamine is underdosed, so a pure 300 mg product plus separate ALA is usually the better value.
Prices checked 2026-07-05. Cost shown is per clinically effective daily dose, not per pill.
Full Comparison
| Category | Benfotiamine Double Wood | Benfotiamine 300mg Nutricost | Benfotiamine 300 with BenfoPure Doctor's Best | Mega Benfotiamine 250mg Life Extension | Benfotiamine 150mg Source Naturals | Benfotiamine 150 + Alpha-Lipoic Acid 300 Doctor's Best |
|---|---|---|---|---|---|---|
| Brand Score | 83/100Winner | 82/100 | 80/100 | 76/100 | 72/100 | 66/100 |
| Dosing & Form | 23/25Winner | 23/25 | 23/25 | 20/25 | 18/25 | 16/25 |
| Purity | 19/25Winner | 16/25 | 16/25 | 17/25 | 15/25 | 16/25 |
| Value | 20/25 | 23/25Winner | 20/25 | 20/25 | 20/25 | 13/25 |
| Transparency | 21/25Winner | 20/25 | 21/25 | 19/25 | 19/25 | 21/25 |
| Cost/Day | $0.32 | $0.19Winner | $0.31 | $0.20 | $0.22 | $0.77 |
| Dose/Serving | 300mg | 300mg | 300mg | 250mg | 150mg | 150mg |
| Form | Capsule (150 mg x 2) | Capsule (300 mg) | Veggie capsule (BenfoPure benfotiamine) | Veggie capsule (250 mg + 10 mg thiamine HCl) | Tablet (150 mg) | Veggie capsule (150 mg benfotiamine + 300 mg ALA) |
| Third-Party Tested | ✓ Yes | ✓ Yes | No | No | No | No |
| Proprietary Blend | No | No | No | No | No | No |
Frequently Asked Questions
Is benfotiamine better than regular vitamin B1?
For raising thiamine levels, yes - and that is its one clearly proven advantage. Benfotiamine is fat-soluble, so it produces substantially higher blood and tissue thiamine than the same dose of water-soluble thiamine HCl or mononitrate found in most B-complex supplements. Whether that higher level delivers the health benefits it is marketed for is a separate, less-settled question.
Does benfotiamine actually help nerve problems?
The evidence is mixed and dose-dependent. Short-term trials found symptomatic improvement at 600 mg/day (not 300 mg/day) over about six weeks. But the longer, more rigorous trials - 12 and 24 months - did not find a benefit on objective nerve-function measures. So the honest answer is that it may ease nerve symptoms in the short term but has not been shown to repair nerve function over the long term. Discuss nerve symptoms with your doctor rather than self-treating.
How much benfotiamine should I take?
300 mg/day is a reasonable dose for general metabolic and B1-coverage use. If you are targeting nerve comfort, the trials that found a benefit used 600 mg/day, usually split into two doses. Doses up to about 900-1,050 mg/day have been used short-term in studies without safety problems. Take it with food for best absorption.
Is benfotiamine useful on a GLP-1 medication?
Possibly as coverage, not as a proven benefit. Thiamine is water-soluble and its levels can drop when food intake falls sharply, which happens on GLP-1 medications. Benfotiamine is a well-absorbed way to maintain B1 status, and its metabolic mechanism overlaps the goals of GLP-1 users. But no trial has tested it as a GLP-1 companion, so treat it as sensible B-vitamin insurance rather than a results booster, and run it past your prescriber.
What should I look for when buying benfotiamine?
Pure benfotiamine at 300 mg or more per serving, ideally third-party tested. Avoid 'nerve support' or B-complex blends where benfotiamine is just one of many ingredients at a token 50-150 mg dose - those rarely reach a studied amount and cost more per effective dose. A simple single-ingredient product from a brand that tests its products is the value play.
Is benfotiamine safe?
Yes, it is one of the safer supplements available. Clinical trials lasting up to two years and doses up to about 1,000 mg/day found no serious adverse effects, and it is a form of an essential vitamin with a strong safety record. Mild stomach upset is the occasional complaint. Standard advice applies: if you take medications or have a medical condition, check with your clinician.
Related Reading
Sources
- Stracke H, et al. Benfotiamine in diabetic polyneuropathy (BENDIP): results of a randomised, double blind, placebo-controlled clinical study. Exp Clin Endocrinol Diabetes. 2008;116(10):600-5.
- Stirban A, et al. Benfotiamine prevents macro- and microvascular endothelial dysfunction and oxidative stress following a meal rich in advanced glycation end products in individuals with type 2 diabetes. Diabetes Care. 2006;29(9):2064-71.
- Bönhof GJ, et al. BOND study: a randomised double-blind, placebo-controlled trial over 12 months to assess the effects of benfotiamine on morphometric, neurophysiological and clinical measures in patients with type 2 diabetes with symptomatic polyneuropathy. BMJ Open. 2022;12(2):e057142.
- Fraser DA, et al. The effects of long-term oral benfotiamine supplementation on peripheral nerve function and inflammatory markers in patients with type 1 diabetes: a 24-month, double-blind, randomized controlled trial. Diabetes Care. 2012;35(5):1095-7.
- Alkhalaf A, et al. A double-blind, randomized, placebo-controlled clinical trial on benfotiamine treatment in patients with diabetic nephropathy. Diabetes Care. 2010;33(7):1598-601.
- Haupt E, et al. Benfotiamine in the treatment of diabetic polyneuropathy - a three-week randomized, controlled pilot study (BEDIP study). Int J Clin Pharmacol Ther. 2005;43(2):71-7.
Scores and tiers are our independent opinion, formed by applying a published rubric to label data, third-party certifications, and the research record. They are not statements of objective fact about a product and not a lab test. Where we report a brand-specific fact, it comes from a cited source or a public certification; where verification is missing, we say so rather than assume a result.
FDA Disclaimer: These statements have not been evaluated by the Food and Drug Administration. Dietary supplements are not intended to diagnose, treat, cure, or prevent any disease. Always consult with a qualified healthcare professional before starting any supplement regimen.