It is a myth that these people do not need sun screens. Although, it is true that dark skin does not burn or tan easily, it does get affected due to the harmful UV radiation. The melanin in the skin does not make it cancer-proof, and hence it is necessary to use sun protection products, while exposing yourself outdoors. Naturally, dark skinned people have an SPF of 13 or more, hence, any sun screen lotion with SPF more than that, is sufficient. Opt for the ones that protect from UVA rays as well as UVB.