glp-1 1-37 (1-37) (human, rat, mouse, bovine) (trifluoroacetate salt) (Glucagon-like Peptide 1 (1-37)) Glucagon-like peptide-1 - Wikipedia
Description
Not as a rigid script to follow, but as a value-based compass to steer the journey
However, this hypothesis lacks supporting evidence
Three doses per week can theoretically maintain adequate levels

Also approved to reduce cardiovascular risk

While you wont necessarily absorb all of it, low levels of vitamin B12 can significantly impact energy levels, leading to feelings of tiredness and weakness

Ornelas C, Caiado J, Lopes A, Pereira Dos Santos MC, Pereira BM
