Short answer

Our sources describe something specific about taking B-complex with Multivitamin:

Multivitamins can push some nutrients (iron, vitamin A, zinc, niacin and folic acid) above their upper limits when combined with other supplements. Check the totals on both labels.

B-complex (active forms)

What it is: A mix of B vitamins in their active forms.

What the research says: B vitamins help turn food into energy and keep blood and nerve cells healthy; a supplement helps if your diet falls short.

Cautions

• High-dose folate can hide a vitamin B12 deficiency.
• Taking a lot of vitamin B6 for a year or more can cause nerve damage.
• Niacin at 30 mg or more can cause flushing and itching.

Medicines to check

• Methotrexate: folate can interfere with it
• Anti-seizure medicines (folate and vitamin B6 notes)

In Holitro: Methyl B-Complex

Sources: NIH Office of Dietary Supplements: Folate: Fact Sheet for Consumers (updated November 2022); NIH Office of Dietary Supplements: Vitamin B6: Fact Sheet for Consumers (updated June 2023); NIH Office of Dietary Supplements: Niacin: Fact Sheet for Consumers (updated March 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.