is tb 500 better than bpc 157 BPC-157 & TB-500: What You Need to Know BPC-157 vs TB-500 Guide -

They can be injected in the same session (separately drawn up, separate syringes), but never mix in the same vial

To illustrate, a 2015 study showed that rats fed a collagen peptide absorbed more than 63% of the collagen, whereas other orally administered peptides have exhibited bioavailability rates as low as 1-2%.12 13 BPC-157 is an exception, too it remains stable in gastric juice for more than 24 hours, allowing it time to pass through the gastrointestinal walls15 but its often used in conjunction with the not-so-orally-bioavailable TB4

Further details can be found in the product data sheet of the manufacturer

BPC-157 works on cell pathways