The neurocosmetics debate: important considerations

A recent Hindustan Times article frames neurocosmetics primarily as a marketing-driven wellness trend, arguing that claims around “mood-enhancing” serums lack scientific credibility because topical skincare cannot meaningfully influence emotions or brain chemistry in the way brands imply.

While the piece raises valid concerns about exaggerated commercial claims and the absence of robust clinical evidence for many products, it overlooks a substantial body of neurocutaneous research — including work discussed by Rizzi et al (2021). — showing that the skin possesses its OWN neuroendocrine and neuroimmune signalling systems.

In particular, the article does not address the role of skin cells in producing and responding to mediators such as cortisol, serotonin and dopamine, nor the established olfactory pathway through which fragrance can interact with stress regulation via the HPA axis. 

Our response therefore aims not to defend overhyped marketing, but to correct the article’s oversimplified dismissal of the biological mechanisms underpinning neurocosmetic science.The article is right to attack exaggerated “serum fixes your mood” claims, but its argument has several scientific gaps.

Main flaw: it treats neurocosmetics as if the claim must be “a cream directly changes brain chemistry.” That is too narrow. Rizzi et al. define neurocosmetics as products acting on the cutaneous nervous system, affecting skin neuromediators through different mechanisms, especially skin stress pathways linked to aging and inflammation.

What the article omits:

1. Skin has its own neuroendocrine machinery.
   The skin is not just a passive barrier. Reviews describe a peripheral HPA-like axis in skin, where keratinocytes, mast cells, sebocytes and melanocytes can locally produce stress-related hormones.
2. Cortisol is not only “brain chemistry.”
   Stress can activate local skin pathways involving CRH, ACTH and cortisol. So a topical ingredient does not need to “enter the brain” to plausibly affect stress-related skin biology; it may modulate local inflammatory, barrier, sensory or neuroimmune responses.
3. Serotonin and dopamine are also cutaneous signals.
   The skin contains neurotransmitter receptors and neuromediators including serotonin, dopamine, corticotropin-releasing hormone, substance P and β-endorphin. These are relevant to keratinocyte activity, inflammation, itch, pigmentation and sensory perception.
4. It ignores the olfactory route.
   Many “mood” effects in cosmetic use may come through fragrance, not the cream base. Olfactory stimulation can influence stress responses, and reviews report that essential oils such as lavender, rose and sweet orange may interact with the HPA axis and cortisol regulation.
5. It creates a false binary: scam vs proven mood drug.
   The fair position is: neurocosmetics are biologically possible, but more work is needed to clinically prove many claims. Rizzi et al. explicitly discuss claims, regulation and the need to confirm efficacy, not a blanket promise that cosmetics can treat mood disorders.

So the stronger critique is not “there is no truth in this serum.” It is: neurocosmetic mechanisms are real at the skin–nerve–immune level AND HPA-axis stress response, but many brands often overstate them as emotional-wellness or hormone-balancing outcomes without strong human clinical data. 

At Children of Earth, our formulations are intentionally designed around this evolving understanding of the cutaneous neuroendocrine system and stress biology. The skin is now recognised not simply as a passive barrier, but as an active neuroimmune organ capable of participating in signalling pathways associated with cortisol regulation, inflammation, sensory perception and barrier integrity. Our approach therefore focuses on BOTH supporting the skin’s peripheral stress-response systems and sensory pathways — including the olfactory route linked to the HPA axis — rather than making reductive claims about directly “changing mood” or altering brain chemistry.

This distinction is important: the science supports the possibility of influencing the visible and perceived effects of stress on skin and wellbeing through neurocutaneous mechanisms, even if many commercial claims in the category have moved ahead of definitive clinical evidence.

We have gone through the data for every single ingredient identified as neurocosmetic in our products (for example NAD+ in our longevity hand cream) , categorised into topical application studies and olfactory aromatherapeutic results (effect on HPA Axis). If you would like deep dive into this, send us a DM on Instagram for our science library for your chosen product and we will be posting more about this on Tiktok soon. Stay tuned.