Well really what is natural anymore?
If you want to get really hardcore about being natural take off all your clothes and run out in the wilderness. There, in a completely natural enviroment, secure your food, water, shelter but do not forget to workout with logs and big rocks etc.
Let's face it, we are dependant upon one another in the form the socities we live in. They provide an UNATURAL supply of food, water, and clothing. We all live in lands of excess compared to a truly natural man living off the land. Also, taking creatine in huge amounts is not natural.
Start your cycles and be done with it.
