“If you really must go to a tanning booth, do it in the morning,” says Nobel Laureate Aziz Sancar, from the University of North Carolina, Chapel Hill, U.S. A tanning booth is a device usually used for the purpose of cosmetic tan. They use very high output lamps that emits UV rays which is similar to Mediterranean sun during mid day. People who get a lot of UV exposure are at greater risk for skin cancers. Our body has their own repair mechanism protecting us from DNA damage. Nucleotide excision repair, a mechanism where cells use to repair the DNA damage induced by ultraviolet rays (UV). Humans are most likely to have maximum repair capacity in the morning hours.