SERIOUS MASS 12 LBS (5,455 KG)Serious Mass Sa tng cn nhanh vt tri Serious Mass l dng sn phm sa tng cn ch o ca thng hiu Optimum Nutrition mt trong nhng thng hiu ln trn th gii vi hn 30 nm pht trin trong ngnh thc phm b sung nh vo nhng sn phm cht lng vt tri nh Whey Gold Standard hay HydroWhey ON tng c nc. Serious Mass l mt sn phm Sa Mass Tng Cn c coi l hiu qu nht t trc ti nay, vi hn 20 nm lm ma lm gi trn th trng quc t khng nh s uy tn, kt hp vi thit k chuyn bit dnh ring cho ngi gy gip