does bac water need to be refrigerated after opening

I'm doing B12 injections once/week wondering if I can increase to twice weekly? Size:1000 mcg/ml - 30 ml x 3 Google_Test https://plexusdx.com/cdn/shop/files/MIC_B12.png?v=1778866329&width=1200 What is the purpose of combining BPC-157 and TB-500 in a peptide blend

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