The length of time that a tan lasts can vary from two to four weeks. The tan will fade gradually from the time of the last tanning session. The time it takes for a tan to fade depends on the darkness and depth of the tan.
Tans can be faded through the use of exfoliants or lotions containing alpha hydroxyl acids (AHAs). Both options work by removing dead skin cells and increasing cellular turnover.
Tanned skinned is damaged skin. A tan is the body's way of guarding the skin against sunburn. While a tan is preferable to burnt skin, it is still unhealthy. Using suntan lotion and avoiding lengthy sun exposure are the best ways to protect the skin.