taurine
use taurine 6-12 grams a day, clen depletes taurine levels, first signs are muscle cramping, but use it always while on clen, besides its cheap as hell, why waste your money on hmb? and creatine? if anything use glutamine, by the way most phd's from school that i've talked to say they'd be more afraid of clen's side effects in the long term than roids, so instead of hmb buy some gear.