ingestible · for nerve pain & neuropathy
Benfotiamine (Fat-Soluble Vitamin B1)
Reviewed by the Nimbera editorial team · Last updated May 2026
How to use
Typical studied doses are 300-600 mg daily, divided into two doses taken with meals. Use specifically benfotiamine (the fat-soluble form), not plain thiamine hydrochloride or mononitrate from B-complex supplements - benfotiamine achieves much higher tissue thiamine levels. Allow at least 6-8 weeks to assess symptom response.
How it works
Benfotiamine is a fat-soluble prodrug of thiamine (vitamin B1) with significantly greater bioavailability than standard thiamine. In diabetic neuropathy, high glucose overwhelms thiamine-dependent enzymes, shunting metabolites into pathways that produce advanced glycation end-products (AGEs), reactive oxygen species, and inflammatory mediators that damage nerve fibers. Benfotiamine activates transketolase, redirecting these toxic metabolites and protecting nerve tissue.
Where to buy
Must be labeled specifically as benfotiamine (not just "B1" or thiamine). Reputable brands include Benfotiamine Inc., Life Extension, Thorne, and NOW. Available at health food stores and Amazon. Third-party tested products preferred.
Typical cost: $15-$35/month at 300-600 mg dosing
Safety notes
Generally very safe with a favorable side-effect profile in clinical trials. Do not substitute benfotiamine for medically necessary thiamine repletion if you have confirmed thiamine deficiency (Wernicke encephalopathy risk). Avoid B6 (pyridoxine) at doses above 200 mg/day if taking a B-complex alongside benfotiamine - chronic high-dose B6 can itself cause a painful sensory neuropathy. Inform your doctor if you are on metformin, as metformin can reduce B12 absorption, which may complicate neuropathy management.
Drug & supplement interactions
- Always tell your doctor or pharmacist about any supplements you take.
- Interactions can occur with prescription medications, blood thinners, and immunosuppressants.
- Herbal remedies can affect how the body absorbs or metabolises drugs.
- Check drugs.com interactions checker before starting.
Clinical source
Stracke 2008 - Exp Clin Endocrinol Diabetes (PMID 18473286)This information is compiled from primary clinical literature and is for informational purposes only. It is not a substitute for professional medical advice. Read our full disclaimer.