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however, no significant correlation between O 2 - and the concentration of pesticides was found

Further, NICE and the BNF says that if there are neurological symptoms present, then every other day injections are the recommended treatment, so all the points you make about B12 being stored and sufficient are not really relevant

If you are comparing BPC-157 vs TB-500 , the short answer is that they are usually discussed as complementary healing peptides rather than true substitutes

Standard protocol: let the BPC-157 vial and your bacteriostatic water come to room temperature, wipe both stoppers with a 70% isopropyl swab, then inject the water slowly down the side wall of the peptide vial

These concerns are based on biological plausibility rather than demonstrated human harm