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The biggest risk isn't BPC-157 itself it's the source

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But, there are some downsides: They need regular shots, which might not fit everyones lifestyle

Oral preparations of Vitamin B12 may increase serum levels but many patients remain symptomatic until they use sublingual or vitamin B12 injections due to low cellular concentrations 6

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p63 is a stem cell marker that belongs to a family that includes two structurally related proteins, p53 and p73 [16], while PCNA, which is present in proliferating cells throughout the cell cycle, is a well-established marker of proliferating cells [17]