What it means
Chemical suppliers can sell some substances for laboratory research. A growing number of websites use that label for injectable products, including semaglutide, tirzepatide, retatrutide, survodutide and mazdutide, while marketing them to the public with dosing instructions.
The FDA has warned companies selling these products. It says their quality is unknown: they may contain the wrong amount of drug, the wrong substance, contaminants or bacteria. Unapproved peptides such as BPC-157 and MOTS-c are sold the same way.
The "not for human use" label does not make these products legal to use as medicine, and it shifts all risk to the buyer. There is no label, no checked dose and no one accountable for sterility.
If you have had a reaction to a product like this, you can report it to FDA MedWatch and tell your clinician what you took.
Why it matters
A low price and a 'research' label are warning signs, not a loophole.