bpc-157 synthetic peptide gastric juice is one of the peptides that has been getting a lot of attention recently. It is a derived from a protein found in human juice. In experimental research BPC-157 Research Peptide — Pharmacokinetics
Description
Not intended for human or animal injection, therapeutic, or diagnostic use

Hormone Replacement Therapy (HRT): When balancing hormones like testosterone or thyroid, B12 acts as an excellent complementary treatment to restore natural vitality

South Med J 1988

So placing a pill thats designed to be swallowed under your tongue instead can be dangerous and even deadly

Vitamin B12 is essential for energy production, brain health, and red blood cell formation
