Multivitamin and Vitamin C: Can You Take Them Together?

At most a minor interaction

Multivitamin and Vitamin C have at most a minor documented interaction. Count vitamin C from food and every product. Avoid unnecessary high doses and ask a clinician about supplementation during pregnancy, breastfeeding or treatment for a medical condition. Follow any individual restriction or prescribed plan. Space from iron-containing multivitamin if iron status is adequate. People with a history of kidney stones or with hemochromatosis should check high-dose vitamin C with a clinician.

What the evidence says

minorconflict· moderate evidence

Multivitamins typically contain 60–500mg of ascorbic acid. Adding standalone vitamin C (often 500–2000mg) can create combined intakes near or above the US adult upper intake level of 2,000 mg a day (EFSA could not establish an upper intake level). High-dose vitamin C enhances non-heme iron absorption non-selectively, potentially contributing to iron overload in susceptible individuals (hemochromatosis). Part of a high vitamin C intake is excreted as oxalate.

What to do: Count vitamin C from food and every product. Avoid unnecessary high doses and ask a clinician about supplementation during pregnancy, breastfeeding or treatment for a medical condition. Follow any individual restriction or prescribed plan. Space from iron-containing multivitamin if iron status is adequate. People with a history of kidney stones or with hemochromatosis should check high-dose vitamin C with a clinician.

Multivitamin

Evidence, dosage & safety →

Vitamin C

Evidence, dosage & safety →

Compare Multivitamin vs Vitamin C Check your full stack

Related interactions

Multivitamin & Orlistat B-Complex & Multivitamin Multivitamin & Vitamin A Multivitamin & Vitamin B6 Multivitamin & Vitamin B12 Multivitamin & Vitamin D3

Frequently asked questions

Can you take Multivitamin and Vitamin C together?: Multivitamin and Vitamin C have at most a minor documented interaction. Count vitamin C from food and every product. Avoid unnecessary high doses and ask a clinician about supplementation during pregnancy, breastfeeding or treatment for a medical condition. Follow any individual restriction or prescribed plan. Space from iron-containing multivitamin if iron status is adequate. People with a history of kidney stones or with hemochromatosis should check high-dose vitamin C with a clinician.
Do Multivitamin and Vitamin C interact?: Combined intake can exceed the US upper intake level. EFSA could not establish an upper intake level for vitamin C because the evidence was insufficient. The US upper intake level for adults aged 19 and over is 2,000 mg a day from food and all supplements combined, including during adult pregnancy and breastfeeding. This is not a target dose or a guarantee of individual safety. For ages 14–18, the US upper intake level is 1,800 mg of vitamin C per day from food and supplements combined, including during pregnancy or breastfeeding. This is an upper limit, not a recommended target or a guarantee of safety. In iron-replete individuals, enhanced iron absorption from multivitamin iron + vitamin C may contribute to iron excess. In a large US cohort, supplemental vitamin C of 1,000mg/day or more was associated with a higher risk of new kidney stones in men (HR 1.19). The same analysis did not find the association in women, which does not show that women have no risk. Multivitamins typically contain 60–500mg of ascorbic acid. Adding standalone vitamin C (often 500–2000mg) can create combined intakes near or above the US adult upper intake level of 2,000 mg a day (EFSA could not establish an upper intake level). High-dose vitamin C enhances non-heme iron absorption non-selectively, potentially contributing to iron overload in susceptible individuals (hemochromatosis). Part of a high vitamin C intake is excreted as oxalate.
Should you separate Multivitamin and Vitamin C?: Count vitamin C from food and every product. Avoid unnecessary high doses and ask a clinician about supplementation during pregnancy, breastfeeding or treatment for a medical condition. Follow any individual restriction or prescribed plan. Space from iron-containing multivitamin if iron status is adequate. People with a history of kidney stones or with hemochromatosis should check high-dose vitamin C with a clinician.

This information is for educational purposes only. It is not a substitute for professional medical advice. Always consult a qualified healthcare provider before starting, stopping, or changing any supplement or medication.

What the evidence says

minorconflict· moderate evidence

Frequently asked questions

Can you take Multivitamin and Vitamin C together?

Do Multivitamin and Vitamin C interact?

Combined intake can exceed the US upper intake level. EFSA could not establish an upper intake level for vitamin C because the evidence was insufficient. The US upper intake level for adults aged 19 and over is 2,000 mg a day from food and all supplements combined, including during adult pregnancy and breastfeeding. This is not a target dose or a guarantee of individual safety. For ages 14–18, the US upper intake level is 1,800 mg of vitamin C per day from food and supplements combined, including during pregnancy or breastfeeding. This is an upper limit, not a recommended target or a guarantee of safety. In iron-replete individuals, enhanced iron absorption from multivitamin iron + vitamin C may contribute to iron excess. In a large US cohort, supplemental vitamin C of 1,000mg/day or more was associated with a higher risk of new kidney stones in men (HR 1.19). The same analysis did not find the association in women, which does not show that women have no risk. Multivitamins typically contain 60–500mg of ascorbic acid. Adding standalone vitamin C (often 500–2000mg) can create combined intakes near or above the US adult upper intake level of 2,000 mg a day (EFSA could not establish an upper intake level). High-dose vitamin C enhances non-heme iron absorption non-selectively, potentially contributing to iron overload in susceptible individuals (hemochromatosis). Part of a high vitamin C intake is excreted as oxalate.

Should you separate Multivitamin and Vitamin C?

Count vitamin C from food and every product. Avoid unnecessary high doses and ask a clinician about supplementation during pregnancy, breastfeeding or treatment for a medical condition. Follow any individual restriction or prescribed plan. Space from iron-containing multivitamin if iron status is adequate. People with a history of kidney stones or with hemochromatosis should check high-dose vitamin C with a clinician.