Tanning takes place in the skin’s top layer – the epidermis. Melanin – the protective pigment responsible for skin colour - is produced by cells called melanocytes.

When skin is exposed to the sun, the melanocytes increase melanin production and distribute it to the neighbouring cells where it accumulates for natural protection against sun damage. A gradually acquired tan comes from the whole epidermis. As new cells reproduce, the old cells are pushed towards the surface carrying the melanin with them. The more melanin there is in the skin, the deeper and longer-lasting the tan.