Does FSA cover supplements?
General-health supplements aren't FSA-eligible — the IRS excludes supplements taken for overall wellness, though ones a doctor prescribes to treat a diagnosed condition can qualify with documentation.
What flips the answer
- Covered when
A doctor prescribes the supplement for a diagnosed condition or deficiency (e.g., prenatal vitamins), documented with a Letter of Medical Necessity.
- Not covered when
The supplement is for general health, energy, or wellness with no diagnosed condition behind it — the common case.
- Not covered when
The LMN isn't filed and substantiated within your FSA plan year, since unused FSA elections don't carry forward indefinitely.
IRS Publication 502 excludes vitamins and dietary supplements taken to maintain general health, because they don't treat, cure, mitigate, or prevent a specific diagnosed condition. The rule is identical for FSA and HSA dollars, since both draw on the same IRS qualified-expense list.
The exception is condition-specific: a doctor-prescribed supplement for a diagnosed deficiency or condition — prenatal vitamins during pregnancy, or a supplement tied to a documented nutrient deficiency — can qualify, typically with a Letter of Medical Necessity on file. Protein powders and general wellness stacks fall on the non-qualified side.
Because FSA funds are use-it-or-lose-it within the plan year, plus at most a short grace period or limited carryover, any LMN paperwork has to be filed and substantiated before your plan year's deadline — unlike an HSA balance, which rolls over and can be reimbursed from later.
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