Your perfect supplement

Before you start a new supplement

• Start with lab tests. Vitamin D, B12, or iron deficiency is confirmed by a test, not by symptoms.
• One supplement at a time. If you start four at once, you won't know which one is working.
• Check interactions. Some supplements interact with chronic medications like blood thinners and thyroid medication.
• More isn't always better. Fat-soluble vitamins accumulate in the body.

The recommendations in this tool are for guidance only and are based solely on your answers. They do not replace a doctor's visit or lab tests, especially during pregnancy or breastfeeding or while taking chronic medication.