Around half of UK adults currently take a food supplement but vitamins and minerals are usually only needed in small amounts ...

Vitamin B6 can also influence serotonin and dopamine levels, which can impact your sleep if taken too late, Keatley says.

If we ate a varied, healthy diet and were outdoors regularly, supplementation would be limited to those with a proven need.

Higher doses of folic acid during early pregnancy were safe and linked to improved verbal and behavioral skills in children ...