7Nutrition HCL Creatine. The purest creatine hydrochloride - HCL. The strongest and most absorbable form of creatine you can get on the market.  According to the survey, it provides nearly 70% better absorption than the most popular creatine monohydrate.  Creatine HCL is characterized by its stability through resistance to the acidic environment of the gastrointestinal...