How to Choose BPC 157 Peptide and TB 500: A Complete Buyer's Guide BPC 157 + TB 500 Blend 20mg Research Peptide PRG BPC 157 + TB 500 Stack Dual Research Peptide BPC 157 and TB 500 can be mixed together, and many people do this for convenience. TB 500 is the shorter version of thymosin beta 4. The full thymosin beta 4 has some immune effects, while TB 500 BPC 157 TB 500 Blend 10MG Research Peptide Combination BPC 157 + TB 500 Blend Research Peptide