“… . Physical exercise on sunny days can be more harmful to the skin than other kinds of sun exposure, the authors suggest, because sweating may significantly increase the sensitivity of the skin to ultraviolet radiation, making sunburn more likely. Moisture on the skin reduces the UV light to shorter wavelengths that are more easily absorbed and decreases their reflection and dispersion.” (Link)
Sweat contains minerals such as sodium, potassium, Vitamin C, uric acid, urea, ammonia, lactic acid andchloride. In addition, there are small amounts of other electrolytes. According to sources close to leading Yakub Muslim scientists, those minerals when produced by Pheomelanin and exposed to the right degree of Ultraviolet Light radiation can easily become carcinogenic.