According to the Daily Mail, melanin pills are a type of tanning pill. Manufacturers of these pills claim that their products, such as Tyrosine, which contains the nutrient Para-aminobenzoic-acid (PABA), increase the production of melanin, resulting in a quicker and deeper tan.
Melanin is produced by cells called melanocytes, and it is a natural brown colour pigment that determines the shade of coloring to the skin, according to MedicineNet.com. It also provides some natural protection from the sun's rays. Tanning pills do not include or involve the use of the natural pigment of melanin, as the skin is being tanned by more unnatural elements, such as canthaxanthin, or products that claim to activate the natural production of melanin, states HowStuffWorks.