Tanning Injections Are Trending on Social Media. Here's What Doctors Want You to Know First

If you've spent any time on TikTok or Instagram this year, you may have come across “tanmaxxing” — a trend where people inject a peptide called melanotan (sometimes called melanotan II, or nicknamed the “Barbie peptide”) to get a deep tan without lying in the sun. It sounds appealing on the surface: no UV exposure, no tanning bed, just an injection and a bronzed glow. But dermatologists around the world have spent the past few months sounding the alarm, and the risks involved are worth understanding before this trend gets any bigger.

What Exactly Is Melanotan?

Melanotan is a synthetic peptide built to mimic a hormone your body already makes called alpha-melanocyte-stimulating hormone (α-MSH). Normally, that hormone tells your skin cells to produce more melanin — the pigment responsible for tanning — in response to real sun exposure. Melanotan short-circuits that process. Injected under the skin, it binds to the same receptors and tells your melanocytes to start producing pigment, whether or not you've actually been in the sun.

The result can be a noticeably darker skin tone within days. The problem is that it's not FDA-approved for human use in any form, whether injectable or nasal spray, and it isn't manufactured or regulated the way an approved medication would be. Most of what's sold online is unregulated, made in unknown conditions, and dosed inconsistently from vial to vial.

Why Is This Trending Right Now?

Part of the appeal ties into “tanmaxxing,” a broader social media aesthetic trend that frames deeply tanned skin as a marker of leanness and fitness. Some influencers have also spread the myth that a melanotan-induced tan works like a protective “base tan” against sunburn. Dermatologists have been clear that this isn't how melanin protection works — a chemically induced tan doesn't meaningfully raise your skin's actual SPF, and it does nothing to shield you from UV damage if you're still out in the sun while using it.

What the Risk Reports Actually Say

This isn't a hypothetical concern. Over the past several months, dermatology clinics and health regulators in multiple countries have published case reports and warnings. A few of the documented findings:

• Multiple new or changing moles appearing rapidly after starting melanotan — in one widely reported case, a teenager developed nearly 40 atypical moles on his back within a relatively short period of use

• A dull, uneven gray-toned discoloration of the skin, distinct from a natural tan

• Nausea, flushing, fatigue, headaches, and in some reported cases, kidney complications

• Regulatory bodies including Australia's Therapeutic Goods Administration have publicly stated that unregulated peptides like this pose “significant” public health risks

The mole changes are the part dermatologists are most focused on, since new or rapidly evolving moles are exactly the kind of change that gets flagged during a skin cancer screening. Doctors treating these patients have described the situation as genuinely concerning, particularly in younger patients who may be using melanotan for years before any long-term effects become clear.

The Bigger Picture on Skin Pigmentation

Wanting a more even, sun-kissed complexion isn't the issue — it's a completely normal thing to want. The concern with melanotan is the method: injecting an unregulated compound to manipulate your body's own pigment-producing cells, with no reliable safety data and no oversight of what's actually in the vial. If tone and pigmentation are what you're after, there are established, monitored ways to address sun damage and uneven pigment that don't involve injecting unapproved hormones.

Common Questions

Is melanotan legal to buy? In the United States, melanotan has not been approved by the FDA for any use, and it's commonly sold online as a “research chemical” to sidestep drug regulations — meaning it isn't legally sold or intended for injection into a person, regardless of how it's marketed.

Does a melanotan tan protect against sunburn? No. Despite the “base tan” claims circulating online, a chemically induced tan does not provide meaningful UV protection, and using melanotan is not a substitute for sunscreen.

What should I do if I've already used it? If you've used melanotan and notice any new, changing, or unusual moles, that's worth having evaluated by a dermatologist promptly, since new or evolving moles are one of the key signs doctors screen for.

Are all pigment or tanning peptides equally risky? Regulatory warnings so far have focused specifically on melanotan and melanotan II, but the broader category of unregulated, self-injected peptides marketed for tanning or anti-aging carries the same core problem — no formal safety review of what's actually in the product.

A quick note on where we fit into all this: Cor.e Laser Studio offers CO2 laser resurfacing and IPL, and that's it — we don't perform injectables, peptides, or any injectable treatments of any kind. This post is about a social media trend, not a service we provide. But if what's actually driving your interest in a more even skin tone is sun damage, uneven pigmentation, or texture concerns, that's exactly what CO2 and IPL are designed to address, using treatments with real clinical safety data behind them. We offer a free consultation if you'd like to talk through your options.