Thiamine Tetrahydrofurfuryl Disulfide (TTFD)
Also called TTFD / Fursultiamine
TTFD is a lipid-soluble disulfide derivative of thiamine with high membrane penetration and good blood-brain-barrier crossing. It is used in some countries for beriberi and peripheral neuropathy and is popular in functional-medicine circles for people who suspect thiamine-dependent enzyme dysfunction. It is more expensive and less studied than benfotiamine, and high doses can cause a temporary sulphur-like odour in urine. TTFD is generally considered when standard water-soluble thiamine has not produced the expected response.
Best for
People who do not respond to standard thiamine; nerve and brain health
Absorption
High
Tolerability
Generally well tolerated; rare sulphur smell in urine
Typical timing
With meals to improve absorption
How to take Thiamine Tetrahydrofurfuryl Disulfide (TTFD)
A typical dose of Vitamin B1 (Thiamine): 1–1.5 mg per day (RDA); 100–300 mg for therapeutic use. Best timing: With meals to improve absorption. The form you choose mainly affects absorption and how easily it sits with your stomach, not the overall dose.
Where to buy Thiamine Tetrahydrofurfuryl Disulfide (TTFD)
Choose a third-party-tested brand; the label should name this form explicitly.
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