You've tried the serums. The collagen powders. The SPF (finally). But if your skin still feels reactive, dull, or just not quite right, there's a conversation happening that your bathroom cabinet can't join. The one between your gut and your skin.
The gut-skin axis is an emerging area of research that suggests the health of your microbiome may influence what's happening on the surface of your skin. It's not a fringe idea. It's being discussed in dermatology journals, dietitian podcasts, and increasingly in the GP's surgery. And for women in perimenopause and menopause, where both skin and gut are undergoing significant change, the connection may be especially worth understanding.
The gut-skin axis: what research suggests
Studies indicate that the gut microbiome may play a role in regulating inflammation throughout the body, including in the skin. When the gut microbiome is disrupted, a condition researchers refer to as dysbiosis, the intestinal barrier may become more permeable. This is sometimes called "leaky gut," though it's worth noting that the science here is still evolving.
Emerging evidence suggests that when the gut barrier is compromised, certain compounds may pass into the bloodstream and trigger low-grade systemic inflammation. This inflammation appears to be associated with a range of skin conditions including acne, eczema, rosacea, and general skin reactivity. A 2021 review in Frontiers in Medicine found that patients with acne were significantly more likely to report gut symptoms, and that the composition of their gut microbiome appeared to differ from those without acne.
For women in perimenopause, falling oestrogen is associated with a reduction in collagen production and skin hydration. These changes may be compounded if gut microbiome diversity is also declining at the same time.
What the science indicates about microbiome diversity and skin
Microbiome diversity, which refers to the range of different bacterial species living in your gut, appears to be a key marker of gut wellness. Research suggests that a more diverse microbiome may be associated with lower levels of systemic inflammation, which in turn may support clearer, more resilient skin.
Fermented foods, fibre-rich plants, and reducing ultra-processed food intake are all associated with greater microbiome diversity in research settings. A landmark 2021 study in Cell found that a diet high in fermented foods appeared to increase microbiome diversity and reduce markers of inflammation, though researchers note that individual responses vary considerably.
The gut-skin connection also appears to involve the gut's influence on hormone metabolism. The estrobolome, which is the collection of gut bacteria involved in metabolising oestrogen, may play a role in how oestrogen is processed and recycled in the body. This in turn may influence skin hydration, oiliness, and sensitivity during perimenopause.
What this may mean for your skincare routine
This isn't a reason to throw out your moisturiser. But it may be worth thinking about your skin and your gut as part of the same system, rather than two separate concerns.
If your skin has become more reactive, dry, or prone to breakouts, particularly around perimenopause, it may be worth paying closer attention to your gut patterns at the same time. The two conversations may be more connected than they first appear.
For those wondering where to begin, small and consistent tends to work better than dramatic overhauls. Some things that appear to support microbiome diversity, and in turn may be associated with calmer, more resilient skin:
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Aim for more plant variety across the week rather than eating the same foods on rotation, since diversity in diet appears to support microbiome diversity
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Support fibre intake consistently, as fibre is thought to be one of the key nutrients gut bacteria rely on
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Introduce fermented foods gradually if they suit you, as research suggests they may support the gut microbiome over time
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Avoid changing everything at once, since individual responses to dietary changes vary considerably
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Look for patterns over weeks rather than overnight fixes, since the gut-skin relationship appears to shift slowly and steadily
Start from the inside. Find out more about Gutsi here.
Sources
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Bowe WP & Logan AC, "Acne vulgaris, probiotics and the gut-brain-skin axis," Gut Pathogens, 2011.
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Wastyk HC et al., "Gut-microbiota-targeted diets modulate human immune status," Cell, 2021.
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Salem I et al., "The gut microbiome as a major regulator of the gut-skin axis," Frontiers in Microbiology, 2018.
This content is for informational purposes only and does not constitute medical advice. Gutsi is a wellness tracking device and is not intended to diagnose, treat, cure, or prevent any condition. If you have concerns about your digestive health, please speak to a qualified healthcare professional.
