SubQ slower absorption, steadier levels, fewer injection issues.

IM hits faster, stronger onset, not always necessary.

Peptides usually designed for SubQ delivery anyway.

SubQ less pain, easier rotation, better long-term compliance.

IM may waste peptides through faster breakdown.

SubQ preferred for fat loss and GH peptides.

IM only useful if protocol specifically requires.

SubQ minimizes scar tissue over extended peptide use.

IM absorption varies depending on muscle and bloodflow.

Most protocols written assuming SubQ injections.