Short answer

We found no documented interaction between Biotin and Multivitamin in the sources below. That isn't proof the combination is right for you: check each one's cautions, and ask your pharmacist if you take medication.

Biotin

What it is: A B vitamin that helps turn the food you eat into energy.

What the research says: It's widely sold for hair, skin and nails, but there's little evidence for that. A few small studies found harder nails in people with brittle nails.

Cautions

• High-dose biotin can make some lab tests wrong, including thyroid hormone tests. Tell your clinician before a blood test.

Medicines to check

• Long-term anti-seizure medicines can lower biotin levels

In Holitro: Biotin 5000mcg (5000 mcg per capsule)

Source: NIH Office of Dietary Supplements: Biotin: Fact Sheet for Consumers (updated January 2021)

Multivitamin

What it is: A combination of vitamins and minerals in one supplement.

What the research says: A multivitamin raises your daily nutrient intake; it's hard to show it prevents disease. It can't replace a varied diet.

Cautions

• A basic multivitamin is unlikely to cause harm, but check your total intake if you also take other supplements or fortified foods.
• Smokers should avoid multivitamins with large amounts of beta-carotene or vitamin A.

Medicines to check

• Warfarin: talk to your clinician before any supplement with vitamin K

In Holitro: Multivitamin

Source: NIH Office of Dietary Supplements: Multivitamin/mineral Supplements: Fact Sheet for Consumers (updated February 2024)

Check with your doctor or pharmacist, especially if you take medication.

Check your stack — free

Educational information only, not medical advice. This reflects general ingredient overlap, not a personalized safety review. Always check with your doctor or pharmacist before combining supplements, especially if you take medication, are pregnant or nursing, or manage a health condition. These statements have not been evaluated by the FDA.