They correspond to two different documented protocols and per-dose amounts (150 mcg vs 2.5 mg)
Madewell ZJ, Keita AM, Das PM, Mehta A, Akelo V, Oluoch OB, Omore R, Onyango D, Sagam CK, Cain CJ, Chukwuegbo C, Kaluma E, Luke R, Ogbuanu IU, Bassat Q, Kincardett M, Mandomando I, Rakislova N, Varo R, Xerinda EG, Dangor Z, du Toit J, Lala SG, Madhi SA, Mahtab S, Breines MR, Degefa K, Heluf H, Madrid L, Scott JAG, Sow SO, Tapia MD, El Arifeen S, Gurley ES, Hossain MZ, Islam KM, Rahman A, Mutevedzi PC, Whitney CG, Blau DM, Suchdev PS, Kotloff KL
J ethnopharmacology
10.1128/AAC.00897-13 Antimicro
What Is BPC-157 and How Does It Work in the Body
It is a protein-based molecule composed of three amino acids: cysteine, glutamate, and glycine