Benfotiamine
Also known as: fat-soluble thiamine, fat-soluble B1, S-benzoylthiamine.
Thiamine is the cofactor alcohol metabolism burns through first — TPP is required for pyruvate dehydrogenase, α-ketoglutarate dehydrogenase, and transketolase. Benfotiamine is the fat-soluble form with dramatically higher bioavailability than plain thiamine. Tier 2 because it's support, not mechanism, but it's the support without which Tier 1 ingredients run out of fuel.
Where this fits in the system
What it does
Benfotiamine is a lipid-soluble derivative of thiamine (B1) that crosses membranes far more efficiently than water-soluble thiamine HCl. Once inside cells, it is converted to thiamine pyrophosphate (TPP), the cofactor for the enzymes alcohol metabolism leans on hardest.
How it works
Why thiamine runs out
Heavy alcohol use creates an acute thiamine deficit by three routes: it interferes with thiamine absorption in the gut, it increases thiamine turnover in the liver, and it provides its own calories that displace nutrient-dense food. Chronic alcoholism is the classic thiamine- deficiency cause (Wernicke's encephalopathy) but the same depletion happens transiently in a single heavy session.
Higher-tier options in the same role
| Goal | Best (Tier 1) | Strong support (Tier 2) | Situational (Tier 3+) |
|---|---|---|---|
| Liver protection | DHM (Dihydromyricetin), L-Cysteine, NAC (N-Acetyl Cysteine), Sulforaphane | Benfotiamine |
Buying guidance
Look for plain benfotiamine, not blended "B-complex" products — the B-complex doses tend to be too low for acute use.
Deep science · Benfotiamine — deep dive
What TPP does
TPP is the cofactor for:
- Pyruvate dehydrogenase (glycolysis → TCA cycle)
- α-ketoglutarate dehydrogenase (TCA cycle continuation)
- Transketolase (pentose phosphate shunt)
- Branched-chain ketoacid dehydrogenase
When TPP runs low, cellular energy production stalls — and that's before you even get to the cognitive and neurological effects.
Why benfotiamine and not plain B1
Plain thiamine HCl has a transport-limited ceiling on intestinal absorption — you cannot push blood levels past a certain point regardless of dose. Benfotiamine bypasses this because it crosses membranes as a neutral lipid-soluble molecule and is converted to thiamine intracellularly. Plasma TPP rises much higher on the same mg dose.