Usn | Pure Gf-1 Protein - 1Kg-Vanilla Powder Usn | Vanilla | Vanilla | 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-Vanilla