Beta-carotene and peptides: what the 'I turned orange' trend misses

What did @realnickcalabrese actually say?

Nick describes a personal protocol for using Melanotan 2 (MT2) to achieve a tan while avoiding side effects. His core advice: start at 100 micrograms, build sun exposure slowly, and cap use around 250 micrograms a few times per week. He says his early mistake was jumping to 300-500 micrograms too fast, which left him looking "orange" and caused flushing. He also suggests switching to MT1 if you're getting heavy sun exposure, and frames his current approach as side-effect-free.

He's presenting this as a harm-reduction tutorial for a compound that is, to be clear, not approved by the FDA for any use. It's sold as a research chemical. That context is missing from his video entirely, and that omission matters enormously when you're talking to 5,500 people about dosing schedules.

Does the science back this up?

Partially, and in a narrow way. The dose-dependent side effect pattern he describes is consistent with what the limited human data shows, but calling this a "best protocol" oversells the evidence base considerably.

Melanotan 2 is a synthetic analogue of alpha-melanocyte-stimulating hormone (alpha-MSH). It binds to melanocortin receptors, particularly MC1R and MC4R, to stimulate melanogenesis. The MC4R binding is where most of the problematic effects come from: nausea, spontaneous erections, flushing, and appetite suppression. A 2000 study by Wessells et al. in the Journal of Urology confirmed dose-dependent nausea and flushing in human subjects at doses between 0.025 mg/kg and 0.1 mg/kg. His observation that higher doses caused more side effects tracks with that receptor pharmacology.

However, the "start at 100 micrograms" recommendation has no clinical trial behind it. It's community-derived dosing folklore. There is no peer-reviewed paper establishing 100 mcg as a safer loading strategy versus any other starting point. His advice may be directionally reasonable, but presenting it as the "best" approach is not something the data supports.

What did they get wrong (or right)?

He got the general side effect mechanism right. Nausea and flushing from MT2 are real, documented, and dose-related. His instinct to titrate slowly is reasonable harm reduction logic, even if it isn't evidence-based in the clinical sense.

What he got wrong, or at least glossed over, is more significant. The "orange" skin tone he jokes about isn't just an aesthetic quirk. Uneven or excessive melanin deposition, particularly in pre-existing moles and nevi, is a documented concern with melanotan compounds. A 2009 case series by Lanigan and Havelin in Clinical and Experimental Dermatology reported new and changing nevi in MT2 users, raising concerns about melanoma risk. His video treats orange skin as a funny cosmetic problem when the dermatological literature treats changes in pigmented lesions as a potential red flag worth medical evaluation.

He also frames MT1 versus MT2 as a simple preference swap for heavy sun days. That comparison is underexplored. MT1 (afamelanotide) has an actual clinical approval record in Europe for erythropoietic protoporphyria. MT2 does not have that regulatory history. Treating them as casual alternatives understates meaningful differences in their safety profiles and legal status.

What should you actually know?

MT2 is not an approved drug anywhere for cosmetic tanning. In the United States, United Kingdom, and European Union, it is illegal to sell for human use. People are obtaining it through gray-market research chemical suppliers, which means there is no manufacturing oversight, no purity verification, and no consistency between batches. A 2022 analysis published in Drug Testing and Analysis found significant purity and concentration variances in peptide products sold online.

The side effects Nick mentions, nausea and flushing, are the mild end of the reported spectrum. More serious adverse events documented in the literature include priapism, hypertension, and the nevi changes mentioned above. Long-term melanoma risk from chronic MC1R stimulation in humans is genuinely unknown because no long-term safety studies exist. That is not a technicality. It means nobody actually knows what years of use does to skin cancer risk.

If you are interested in photoprotection or managing pigmentation concerns, those are conversations to have with a licensed dermatologist. Telehealth platforms operating under regulatory frameworks do not prescribe MT2 for tanning. There are legitimate, evidence-based conversations happening in medicine around melanocortin pathways, but a TikTok tanning tutorial is not that conversation.