This site is a scam.
I've just been looking on the internet registry and found that:
TheSupplementsKing.com is owned by Liam Derbyshire, *******@hotmail.com, tel: *******2290
He also owns the equaly corrupt BodyBuildingSupermarket.com
Both these seem to be run through Xyone Ltd which is is liquidation. This company runs MiraclesforMen.com which is the company that debits your account. This is operated by Barry Lomax: *******@xyone.co.uk