Which vitamin is commonly referred to as the 'sunshine vitamin' due to its synthesis in the skin upon exposure to sunlight?

A Vitamin A
B Vitamin D ✓
C Vitamin E
D Vitamin B12

Explanation

Vitamin D is produced in the skin upon exposure to UVB radiation from the sun, which is why it is often referred to as the 'sunshine vitamin'.

Mnemonic

'D' for 'Daylight'

Source

Harvard School of Public Health
Vitamins Nutrition Vitamin D Medium MEDICAL Confidence: high