Minimum Uv Index To Tan

When the UV index is 3 or higher, your skin is exposed to sufficient ultraviolet radiation to stimulate melanin production, which results in a tan. However, the amount of time you should spend in the sun depends on several factors, including your skin type and the intensity of the UV rays. Visit : https://www.trutan.net/minimal-uv-exposure-for-a-great-tan/