Chromium polynicotinate binds chromium to niacin, the form of vitamin B3. Manufacturers often claim this pairing improves how well the body absorbs the mineral, but human studies backing that advantage remain sparse.
People use it to support healthy blood sugar metabolism when diet alone falls short. Daily doses run between 200 and 500 mcg, usually taken alongside food. Results from clinical trials are inconsistent.
Caution is needed if you take diabetes medication or thyroid hormones, since chromium can alter their effects. High doses sometimes cause stomach upset or dizziness. Get a doctor’s clearance before starting if you are pregnant, nursing, or under medical care.