Can I Take multivitamin and vitamin d Together?

SUMMARY:

These supplements are generally compatible; the primary issue is additive vitamin D if both the multivitamin and the separate vitamin D product increase total daily vitamin D beyond recommended levels.

ADDITIONAL NOTES:

Many multivitamins already include vitamin D, so combining with a separate vitamin D supplement can increase total intake. Excessive vitamin D can lead to high blood calcium (hypercalcemia) with symptoms such as nausea, weakness, increased thirst/urination, and confusion. People with kidney disease, hyperparathyroidism, or those taking certain medications that affect calcium should be cautious. Check product labels for the IU or mcg of vitamin D, avoid exceeding recommended daily amounts, and consult a healthcare provider before taking additional high‑dose vitamin D.