The answer depends on why you are deficient
A small study of intravenous BPC-157 for interstitial cystitis reported no adverse effects in 12 treated patients
Small soluble nutrients such as saccharides, amino acids, vitamins, divalent metals, and organic ions are absorbed by a broad variety of integral membrane transport proteins such as the glucose transporter SGLT1 and the organic ion transporters (OAT)s [11,12,13]
BPC-157 has been investigated in Phase II clinical trials for inflammatory bowel disease therapy, where it demonstrated a favorable safety profile with no reported toxicity or adverse effects
Dosage / Administration of B12 Injections Subcutaneous shots can be administered instead of intramuscular - means injecting with a very short needle into the fat layers around your abdomen or thighs - easier for self-administration and the B12 is released slowly
The AbdomenThe Preferred Injection Site The abdomen is the best and most commonly recommended injection site for Retatrutide