If most of your ancesters are from Sweden, and you go to Nigeria, you should probably avoid the sun most of the time, and use sunscreen whenever you have to spe

If most of your ancesters are from Sweden, and you go to Nigeria, you should probably avoid the sun most of the time, and use sunscreen whenever you have to spend time in the sun. If most of your ancestors are from Nigeria and you stay in Sweden, you should catch as much sun as you can, and still take vitamin D supplements. If you stay in a location where the bulk of your ancestors came from, you should probably be able to stay outside most of the time, as long as it is relativey constant from month to month. (Ie, anyone who stays inside all day for 11 months would have a risk of sunburn if they suddenly start spending all day on the beach in July without sunscreen.)