Experts haven’t been able to find an LD 50 for melatonin. Very high doses of melatonin weren’t even fatal in animals. If you want to start melatonin supplements, ask your doctor first.

These drugs may affect melatonin, lowering its amount in the blood, which might impact sleep patterns, especially if used a lot or in high doses. If you're having intense or strange dreams after ...

Researchers from North Carolina and British Columbia say the sleep supplement could be a “viable intervention strategy to reduce the burden of cancer” among that group, boosting the body’s ...

Night shift workers face an increased risk of cancer, as their disrupted sleep cycle causes wear and tear on their DNA. But taking melatonin might help ward off this risk, a new study suggests.