Name the medicine before weighing it.

A peptide is a small chain

Amino acids are small building parts for proteins; a peptide is a short chain of them.

Insulin belongs to this group.

Knowing that something is a peptide is only a starting point.

Separate the ingredient from the brand

A medicine’s working part is called its active ingredient.

Ozempic and Wegovy both contain the medicine semaglutide. As of September 26, 2026, Ozempic had US approval for type 2 diabetes care, and Wegovy for weight loss and keeping weight off. Each product also has specific approved uses that the prescriber can explain.

Mounjaro and Zepbound both contain the medicine tirzepatide. As of September 26, 2026, Mounjaro had US approval for type 2 diabetes care, and Zepbound for weight management. Each also has other approved uses for certain patients.

Brand names can cover different forms or uses.

Ask for the ingredient, the product name and what it is being prescribed for.

Decode the weight-care term

The body makes GLP-1, a signal that helps regulate blood sugar and hunger.

Semaglutide and tirzepatide copy the action of this signal. These medicines are often called GLP-1 drugs.

That is a particular group of medicines, not a name for every peptide.

Find out what sort of product is offered

Is it an approved medicine? Is a pharmacy making it to order? Does the bottle say “research use only” or “not for human use”?

A research-use label refers to laboratory work. That label does not authorise treating people with the bottle’s contents. As of September 26, 2026, FDA, the US agency that reviews medicines, warned people to avoid weight-care products sold this way for human use.

Those questions lead to different checks. Get a clear answer before comparing benefits.