Looking in the mirror and seeing a few more fine lines or a lack of that summer glow is a universal experience. While the beauty industry loves to throw big words at us, some researchers have looked toward peptides—which are just small chains of amino acids—to see if they can help the skin from the inside out.
The quest for a tan without the sun
If you have ever wanted a tan without spending hours under UV rays, you might have heard of Melanotan II. This peptide was originally developed at the University of Arizona. It works as a non-selective melanocortin receptor agonist, which is a fancy way of saying it turns on several different switches in your body at once.
Its main job in this context is stimulating melanogenesis, or the process your skin uses to get darker. However, because it flips so many switches (specifically receptors MC1R through MC5R), it does more than just change your skin tone. It also affects your appetite, sexual function, and even your sebaceous glands, which are the tiny glands that produce oil in your skin.
While the tanning effect is confirmed, there are significant catches:
- Off-target effects: Because it is non-selective, it hits parts of the body you might not be aiming for.
- Safety concerns: There are worries about it potentially promoting melanoma, a type of skin cancer.
- Regulatory red flags: Both the FDA and the TGA have issued safety communications about it. It is not an approved treatment.
Searching for a way to slow down aging
On the other side of the skin health world, researchers have looked into a peptide called Cartalax. This one comes from the St. Petersburg Institute of Bioregulation and Gerontology. It is a very small tripeptide made of three specific amino acids: Alanine, Glutamic acid, and Aspartic acid.
Scientists have used Cartalax in lab models to look at skin aging. The idea is that it might help normalize how your body handles tissue metabolism by talking to your genes. Specifically, researchers look at whether it can influence markers associated with aging, like SIRT1 and p53.
However, the evidence here is what we call Grade C, which means it is low-confidence. Most of what we know about Cartalax and skin comes from studies on animals or cells in a lab, rather than large groups of people. Scientists are still working on this one—turns out the human body is complicated. Who knew?
What should you keep in mind?
Neither of these options has been approved by the FDA or the EMA for these uses. Cartalax is currently sold in Russia as a dietary supplement, but it has not gone through the rigorous Phase III trials required for medical approval elsewhere.
This is a great one to bring up with your doctor. You can find peptide-experienced physicians in our Find a Doctor directory.
This content is sourced exclusively from TruthTides clinical reference data and does not constitute medical advice.
Referenced Peptides
This content was generated from TruthTides clinical reference data. It does not constitute medical advice. Always consult a qualified healthcare provider.