they claim to be natural because that is what they have to do for marketing and legal reasons. just like how Michael Jordan claims to eat mcdonalds and Peyton Manning eats papa johns plastic cheese and fake sauce pizza. welcome to marketing 101, advertisement industry is a multi billion dollar business and people look up to these athletes so whatever they claim is gonna be followed. look at what zyzz did, now every 17 year old wants to run clen because of that guy, he even had his own protein brand before he died lol at 19/20. cheap whey in a tub costs 20 bucks at walmart but kids bought his cause he endorsed it