Can you take magnesium and melatonin together?
verdavita editorial team · 2026-11-05
The NIH pages we reviewed do not say whether this combination is safe or useful. Ask your doctor or pharmacist first, especially if you take medication.
What NCCIH says about melatonin
NCCIH says short-term use appears safe for most people, but information on long-term safety is lacking. Reported side effects in short-term studies include headache, dizziness, nausea and sleepiness.
It also says melatonin may stay active longer in older people and cause daytime drowsiness. People taking medicine should check with their health care provider first, and people with epilepsy or taking blood thinners need medical supervision.
What the NIH says about magnesium
The upper limit from supplements and medications is 350 mg a day for adults, unless a health care provider advises otherwise. Magnesium may also interact with some medications.
Read both labels
Check whether a product already contains the other ingredient. Our Deep Sleep lists 2 mg of melatonin, while Calm Night lists 275 mg of magnesium and no melatonin.
Label accuracy is another reason to be careful. NCCIH cites a 2023 study in which 22 of 25 melatonin gummy products were inaccurately labeled.
Products mentioned
Sources
- NCCIH: Melatonin, what you need to know
- NIH Office of Dietary Supplements: Magnesium fact sheet for consumers
General information, not medical advice. Images are illustrative.