Subcutaneous
Also: subcut, sub-q
In plain language
An injection given into the fatty layer just under the skin rather than into a vein or muscle.
Technical definition
Administration into the subcutaneous tissue beneath the dermis, producing slower absorption than intravenous or intramuscular routes; the standard route for most GLP-1 agonists and research peptides.
Subcutaneous injection is common for peptides because it is easy to self-administer and provides steady absorption. Typical sites include the abdomen, thigh, and back of the upper arm.