Exposure to UV light causes the skin to produce beta-endorphins, which are natural opioids

Well SupportedUp to 70% of people in the US are deficient or insufficient in vitamin D, suggesting widespread supplementation is advisable.

Partially SupportedVitamin D deficiency increases the rewarding effects of UV exposure and sensitizes mice to the pain-relieving and rewarding effects of opioids.

Well SupportedExposure to UV light stimulates the skin to produce beta-endorphins.

Partially SupportedUV-seeking behavior may have evolved as a strategy to ensure adequate vitamin D levels.

Partially Supported