Vitamin B1
Where to Find It
Best Form to Take
There is no clear evidence to suggest that either thiamine hydrochloride or thiamine nitrate—the two most commonly used supplement forms of thiamine—is preferable to the other. However, lipid-soluble derivatives of thiamine, such as thiamine propyl disulfide, thiamine tetrahydrofurfuryl disulfide, and benfotiamine, are reported to be more bioavailable than water-soluble thiamine, and have been used to treat diabetic neuropathy, myalgia, and some other conditions.1
How to Use It
While the ideal intake is uncertain, one study reported the healthiest people consumed more than 9 mg per day.2 The amount found in many multivitamin supplements (20–25 mg) is more than adequate for most people.
Vitamin B1 is nontoxic, even in very high amounts.