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The microbiota also includes eukaryotes such as yeasts and protists, viruses, and a few archaea species ( Methanobrevibactersmithii ) (64, 65)

The high proline content (4 of 15 residues, including a triple Pro-Pro-Pro stretch at positions 3 to 5) gives BPC-157 unusually good resistance to gastric and intestinal proteases, which is why some published animal work uses oral administration

exposure duration, sampling schedule, and concentration verification

Frozen storage ( 20 C, and preferably lower for long-term): Recommended for extended timelines, with vials kept well sealed to limit moisture uptake and oxidative degradation