Product Name GDF-8 Chemical Name Growth Differentiation Factor 8 Other Names Myostatin MF C221H366N72O67S Appearance White Lyophilized Powder Dry Freeze Purity >98% Shippment 99% expédition sûre ; 100% free resend Origin China How does GDF-8 work? Some studies show that the lack of myostatin gives rise to impressive results …