If you ask a CPA, they'll tell you that any non-prescription meds or supplements are not deductible. But I've read in more than one CFS discussion that you can deduct these if you have a letter from your doctor. i think the letter has to say that the supplements are needed for your health problem, and that there are no prescription meds that can be used in the same way. Does anyone know if this is documented anywhere in the tax code or IRS publications? I think I have enough deductions without this, but would like to know.