Does having a tan help protect me against getting skin cancer (i.E., can the use of suntan lotion be reduced as I become more tan?)?
No help here. The sun tan lotions simply give you a tan like appearance but will not protect your skin from the sun damage which leads to skin cancer. The only protectors are sun screens which contain chemicals which block the sun rays. The best way to protect from skin cancer is to stay out of sun, but if you have to go out in the sun for any reasons , use a good sunscreen and apply it every 2 hours.