Can Melatonin Cause Acne? What the Evidence Says

A Semaine Health education guide. Reviewed against the published research; sources linked throughout. Educational content, not medical advice.

The short answer

No, there isn't good evidence that melatonin causes acne. Melatonin is an antioxidant, and researchers have mostly studied it as something that calms inflammation in skin, not something that triggers breakouts. If your skin flared after you started taking it, the more likely story is the reason you reached for melatonin in the first place: disrupted sleep and stress both drive acne, and they were probably already in motion. Here's what's actually happening.

What the research says about melatonin and skin

Melatonin is best known as the hormone that signals night to your body, but it's also a potent antioxidant. Reviews of its role in skin describe it sitting at the intersection of the skin's antioxidant defenses and its own circadian clock, helping manage the oxidative stress that disrupted rhythms can otherwise worsen (Ndiaye et al., 2013, Antioxid Redox Signal; DOI). Other reviews describe melatonin scavenging free radicals and supporting DNA repair and wound healing in skin, the opposite of a mechanism that would trigger breakouts, which is why it occasionally shows up as an ingredient in topical formulas rather than as a cause of acne (Kleszczyński et al., 2011, Dermatoendocrinol; DOI). There is no clinical evidence that taking melatonin for sleep produces acne.

The real connection between melatonin and your skin runs through your body clock. Poor sleep and circadian disruption are linked to more acne, not less. According to research in shift workers, variations in circadian-clock genes were associated with higher acne risk, especially in people working rotating night shifts (Chi et al., 2025, PLOS One; DOI). In other words, the disrupted sleep that sends people looking for melatonin is itself part of the acne picture.

So why does it feel like the melatonin did it?

• You started it because your sleep was already off. Short, broken sleep raises stress signaling, and that stress response acts directly on the skin: research on acne inflammation has found that nerve signals released under stress increase the size of sebaceous glands and their oil output, and trigger local inflammation around them (Toyoda & Morohashi, 2003, Dermatology; DOI). The melatonin is a response to the problem, not the source of it.
• Timing can be coincidental. Hormonal acne follows your cycle. If you start a new supplement a week before your period, a breakout that was coming anyway can look like a reaction.
• The format, not the melatonin. Gummies carry added sugar, and sharp blood-sugar swings are one of the better-established dietary links to breakouts, tested directly in a randomized controlled trial where a low-glycemic-load diet significantly reduced acne lesions over 12 weeks compared with a conventional higher-sugar diet (Smith et al., 2007, Am J Clin Nutr; DOI). A sugary nightly gummy is a different input than a plain melatonin tablet.

What actually drives hormonal acne

If breakouts track with your cycle or sit along your jaw and chin, the root-level drivers are usually hormonal rather than anything in your supplement drawer. Androgens act directly on the sebaceous glands, and androgen-driven sebum production is considered a required step in the development of acne (Del Rosso & Kircik, 2023, J Dermatolog Treat; DOI). Blood-sugar spikes and insulin amplify that androgen signal, and inflammation turns a clogged pore into an angry one. Stress and lost sleep sit underneath all three. That's the system worth addressing, and it's why our deeper read on what really causes hormonal acne and the blood-sugar and hormone link are the more useful places to look.

Supporting the daily systems underneath helps more than chasing one product in or out. Hormone Balance is built around the active-form nutrients and bioactives your body uses to support steady hormones and blood sugar day to day, which is the terrain hormonal acne grows out of. It's daily foundational support, not a spot treatment.

When to see a clinician

Painful, deep, or cystic acne, breakouts that scar, or skin that isn't responding to good basics deserves a dermatologist, who can address it directly. If acne arrived with other changes like new facial hair, irregular periods, or hair thinning, ask about PCOS. You don't have to stop melatonin to find out, but a clinician can help you sort signal from coincidence.

Frequently asked questions

Does melatonin cause acne?

There's no good evidence that it does. Melatonin is an antioxidant studied mostly for calming skin inflammation and supporting the skin's own repair processes (Ndiaye et al., 2013; Kleszczyński et al., 2011). Breakouts after starting it are more likely tied to the disrupted sleep or stress behind it, your cycle, or a sugary gummy format.

Can melatonin gummies cause breakouts?

If anything would, it's the added sugar in the gummy rather than the melatonin. Blood-sugar spikes are a more established acne trigger, shown directly in a randomized trial of low-glycemic-load eating (Smith et al., 2007). A plain tablet avoids that variable.

Can poor sleep cause acne?

Yes, this link is better supported. Short or disrupted sleep raises the stress signaling that increases oil and inflammation in skin (Toyoda & Morohashi, 2003), and circadian disruption has been associated with higher acne risk in shift workers (Chi et al., 2025).

Should I stop taking melatonin if I'm breaking out?

It's reasonable to switch a sugary gummy for a plain tablet and watch for a week or two. But the more useful move is addressing the root drivers of hormonal acne: blood sugar, stress, sleep, and your cycle.

Is melatonin bad for your skin?

No. Research generally frames melatonin as protective for skin because of its antioxidant activity. The concern with breakouts is almost always indirect.

What actually causes hormonal acne?

Androgens acting on the sebaceous glands to raise oil production, a step considered required for acne to develop (Del Rosso & Kircik, 2023), with blood-sugar and insulin swings amplifying that signal, and inflammation, with stress and lost sleep underneath. That's the system to address at the root.

Related reading

• What really causes hormonal acne
• Blood sugar and your hormones
• Does caffeine affect your hormones?

References

1. Chi Y, Yang X, Deng D, Li P, Zhang Y. Polymorphisms in MTNR1A and CLOCK genes associated with facial acne susceptibility in gas-station workers. PLoS One. 2025. DOI: 10.1371/journal.pone.0329150 · PubMed
2. Del Rosso JQ, Kircik L. The primary role of sebum in the pathophysiology of acne vulgaris and its therapeutic relevance in acne management. J Dermatolog Treat. 2023. DOI: 10.1080/09546634.2023.2296855 · PubMed
3. Kleszczyński K, Hardkop LH, Fischer TW. Differential effects of melatonin as a broad range UV-damage preventive dermato-endocrine regulator. Dermatoendocrinol. 2011. DOI: 10.4161/derm.3.1.14842 · PubMed
4. Ndiaye MA, Nihal M, Wood GS, Ahmad N. Skin, reactive oxygen species, and circadian clocks. Antioxid Redox Signal. 2013. DOI: 10.1089/ars.2013.5645 · PubMed
5. Smith RN, Mann NJ, Braue A, Mäkeläinen H, Varigos GA. A low-glycemic-load diet improves symptoms in acne vulgaris patients: a randomized controlled trial. Am J Clin Nutr. 2007. DOI: 10.1093/ajcn/86.1.107 · PubMed
6. Toyoda M, Morohashi M. New aspects in acne inflammation. Dermatology. 2003. DOI: 10.1159/000067818 · PubMed