Why it’s AKA Sunshine vitamin?
Vit D is known as the Sunshine vitamin. Because the active form of VitD3 is produced only when human skin is exposed to sunlight. It should be noted that the sun’s light is required not the heat. Sunlight has several components in various wavelengths Visible light, UV Rays, Infrared Rays etc. Infrared Rays are the heat component of sunlight. For vit D activation it requires the UVB (UltraViolet B) Rays
The ultraviolet rays have wavelengths shorter than 0.4 micrometers and only a small portion of that radiation reaches the Earth. While visible light has a wavelength between 0.4-0.8 micrometres. More than half of the radiation pertains to this component. The component with the longest wavelength is Infrared radiation, more than 0.8 micrometres. 50% of the sun’s energy reaches the earth through these rays. Sunlight is a part of the electromagnetic radiation spectrum, that originates from the sun, which includes X-Rays , Gamma rays & Radio waves
Diagram Showing Vit D3 Synthesis & Activation in The Human Body
