The idea to question
A laboratory label makes an online product a treatment option.
The short answer
Look out for a label saying “for research purposes.” Another warning phrase is “not for human consumption.” Sellers have offered unapproved weight-care drugs with these labels and instructions telling people how much to take. In its September 2026 advice, the Food and Drug Administration (FDA) urges people to leave these purchases alone. FDA’s weight-care cautions

Keep the laboratory wording in its place
The quality is unknown and the products may cause harm, FDA warns. FDA’s weight-care cautions
A question worth asking is: “What finished medicine are you proposing, and what is its actual status?”
A specific example with a clear limit
For retatrutide and cagrilintide, FDA states as of September 2026 that federal law does not allow their use in compounding. FDA’s weight-care cautions
A compound is prepared by a pharmacist or doctor from ingredients, instead of arriving as the drug maker’s finished medicine. FDA’s compounding answers
An offer online does not answer the treatment question. Bring the product name to the doctor or other health professional you see for care, and ask about your options.