The use of pure natural unrefined shea butter as a sunscreen.
Yes, there have been studies that have shown shea butter to have natural sunscreen properties, but the average sun protection factor (SPF) is only about 6. According to the Mayo Clinic “sunscreens with an SPF of at least 2 but less than 15 can advertise protection from sunburn only, not protection from skin cancer or early skin aging.”
This means an additional sunscreen with broad spectrum UVA (can prematurely age your skin) and UVB (can cause skin cancer) protection with an SPF of at least 15 as recommended by the FDA should be used in conjunction with shea butter.
I know it can get exciting hearing that an oil or butter can be used as a more natural sunscreen alternative, but just remember to dig a litter further than the surface to get some additional information.