A vitamin D deficiency increases the craving for opioid drugs – if the vitamin is given as a tablet, the addictive pressure decreases. This is the finding of an international team of researchers led by U.S. scientist Professor David Fisher. Those who lack vitamin D are better helped by opioids against pain. The scientists also see this as a danger of slipping into addiction.
Opiate addicts also have a higher than average incidence of vitamin D deficiency.