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.