People often ask about the difference between BPC 157 arginate and acetate forms, and the answer comes down to stability and absorption. When were talking about oral BPC 157, the arginate form is far Mechanisms of Nitrosamine Mutagenicity and Their Relationship to Rodent Carcinogenic Potency Chemical Research in Toxicology Everyone's talking about peptides like this so let's actually look at the science. Yes there is a study on BPC 157 and cancer. But it's a 2004 conference abstract (not even a BPC 157: Tendon Repair and More BPC 157 vs. Pentadeca Arginate (PDA): Unlocking the Healing Power BPC 157 Pure Delayed Release, 60 Capsules Marty Ross MD Supplements