Is there a product(s) that keeps NATURAL african american hair from splitting and breaking?

i got tired of frying my hair,so about 5 years ago,i decided to go natural. i have a medium length afro,and i like it very much.i just find that at times it becomes very dry and prone to breakage.i have tried various products such as moisturizers,olive oil spray,extra virgin coconut oil, and nothing seems to be helping with the dryness and the breakage.please tell me what to do!! thanks.