Usn | Pure Gf-1 Protein - 1Kg-Chocolate Powder Usn | Chocolate | Chocolate | Usn Pure Gf-1 Protein - 1Kg Pure Protein Gf-1 Is An Integral Part Of The Usn Core Series. Usn’S Pure Protein Is A Protein Blend Which Consists Of A Mixture Of Different Protein Sources. | Usn Pure Gf-1 Protein - 1Kg-Chocolate