Tag: sunlight and immune system

Sunlight plays a fundamental role in human health, serving as the primary natural source of vitamin D. Unlike other vitamins obtained primarily from food, vitamin D is synthesized in the skin when exposed to ultraviolet B (UVB) rays from the sun. This process involves the conversion of 7-dehydrocholesterol, a cholesterol precursor, into pre-vitamin D3, which is then transformed into active vitamin D by the liver and kidneys. Without adequate sun exposure, the body struggles to maintain sufficient levels of this essential nutrient, potentially leading to a host of health issues.