Understanding Acne: A Naturopathic Perspective
By Kylie Sartori | Kylie Sartori Naturopathy, Spotswood, Melbourne
Most people who come to see me about acne have already spent years focused on their skin. They have tried the topical treatments, the skincare routines, the antibiotics, and in many cases the pill. Some things helped temporarily. But the skin kept doing what it was doing, and nobody had really explained why.
The truth is, skin is rarely just a skin problem. What shows up on your face, your jawline, your back, or your chest is often a reflection of something happening much deeper in the body. And in clinic, one of the most consistent patterns I see is the connection between gut health and acne.
Once you understand that connection, a great deal of what your skin has been trying to tell you starts to make sense.
The Gut-Skin Axis
Your gut and your skin are in constant communication through a network of shared pathways involving the immune system, the nervous system, and the inflammatory signalling molecules that both organs produce and respond to.
When the gut microbiome is in good balance, it regulates inflammation, supports immune function, and helps the body process and clear hormones efficiently. When it is disrupted, those functions are impaired, and the effects show up throughout the body, including on the skin.
Dysbiosis, an imbalance of gut bacteria where harmful or opportunistic species are overgrowing and beneficial species are depleted, drives a low-grade systemic inflammation that is one of the most significant contributors to acne. It also impairs the gut lining over time, increasing intestinal permeability. When the gut lining becomes more permeable than it should be, bacterial fragments and inflammatory compounds can cross into the bloodstream and trigger an immune response that the skin then expresses as breakouts, redness, and congestion.
This is why clients frequently mention that their acne flares after periods of stress, after antibiotics, or when their digestion is disrupted. The gut is not a silent bystander in what is happening on the skin. It is one of the primary drivers.
What the Gut Has to Do With Hormones and Acne
Androgens, the hormonal family that includes testosterone, are one of the most well-known contributors to acne because they stimulate the sebaceous glands to produce more oil. When sebum production is excessive, pores become congested and the environment becomes favourable for the bacteria involved in acne to proliferate.
What is less often discussed is how significantly the gut influences androgen levels and hormonal balance more broadly.
The gut microbiome plays a direct role in oestrogen metabolism through a collection of bacteria called the estrobolome. When the estrobolome is functioning well, used oestrogen is processed and cleared through the bowel efficiently. When the microbiome is disrupted, oestrogen clearance is impaired, oestrogen recirculates, and the hormonal balance between oestrogen and androgens shifts in a way that can drive acne, particularly the hormonal pattern along the jawline and chin that many women recognise.
This is also part of why acne in women with PCOS is so resistant to surface treatments. The underlying hormonal picture, driven in significant part by gut health, insulin response, and inflammation, is what needs to be addressed. You can read more about that connection on my conditions treated page.
The Liver's Role
The liver and the gut work together as the body's primary detoxification and clearance system. The liver processes hormones, environmental toxins, and metabolic waste products and packages them for elimination via the bowel. When the gut is not clearing efficiently, either because of dysbiosis, constipation, or a sluggish bowel transit, those processed compounds can be reabsorbed rather than eliminated.
When the liver becomes overburdened, excess hormones and inflammatory compounds that should have been cleared begin to circulate longer than they should, and the skin becomes one of the alternative routes of elimination. The result is often congestion, breakouts, and a dull or reactive complexion that does not respond to topical treatments because the source is internal.
Supporting liver function with herbs like milk thistle, dandelion root, and burdock, while simultaneously improving gut clearance, addresses this cycle at its source.
Stress, Cortisol, and the Gut Connection
Chronic stress drives acne through several pathways at once. Cortisol directly stimulates sebum production and promotes inflammation in the skin. It also significantly disrupts the gut microbiome, reduces the diversity of beneficial bacteria, increases intestinal permeability, and impairs digestion, which loops back into everything above.
The skin also has its own stress response system, with cortisol receptors in the sebaceous glands that respond directly to psychological and physiological stress. This is why skin often flares during exam periods, busy work periods, or emotionally demanding times, even when diet has not changed.
Managing the stress response is not a lifestyle recommendation as an afterthought. It is a clinical priority in acne treatment, particularly where the pattern is clearly stress-triggered.
What Is Actually Driving Your Acne
Given how many systems are involved, acne that has not responded to surface treatments or repeated antibiotics usually has several drivers working together. The most common patterns I see are a disrupted gut microbiome driving systemic inflammation and impairing hormone clearance, increased intestinal permeability allowing inflammatory compounds into circulation, an overburdened liver struggling to keep up with hormone and toxin processing, a hormonal picture, particularly in women, that is being amplified by poor gut health and insulin dysregulation, nutrient deficiencies that impair the skin's ability to regulate oil production and repair itself, and a stress load that is keeping cortisol elevated and the gut in a reactive state.
The specific combination is different for every person, which is why treatment that addresses one factor but not the others rarely resolves acne completely and why a comprehensive gut test is often the most useful starting point.
The Nutrients That Support Skin From the Inside
Once we understand what is driving the acne, targeted nutritional support makes a significant difference to how quickly the skin responds.
Zinc is one of the most clinically well-supported nutrients for acne because it reduces sebum production, calms inflammation, and supports immune function in the skin. It is also essential for gut lining integrity, so it works on both sides of the gut-skin axis. Food sources include pumpkin seeds, oysters, beef, chickpeas, and cashews.
Vitamin A regulates skin cell turnover and reduces the keratin buildup that blocks pores. It works at a deep level of skin renewal that topical retinoids attempt to mimic from the outside. Food sources include sweet potato, carrots, leafy greens, and liver.
Omega-3 fatty acids from oily fish, flaxseeds, chia seeds, and walnuts reduce the inflammatory signalling that drives both gut permeability and skin reactivity. They are particularly useful where acne is inflammatory and red rather than primarily comedonal.
Magnesium supports stress hormone regulation, blood sugar stability, and the detoxification pathways the liver depends on. It is depleted rapidly by stress and is deficient in a large proportion of people whose skin and stress patterns are linked. Food sources include dark leafy greens, nuts, seeds, and whole grains.
Vitamin C supports collagen production, skin repair, and the antioxidant pathways that reduce oxidative stress in the skin. It also supports DAO enzyme function, which is relevant where histamine intolerance is part of the picture. Food sources include citrus, capsicum, strawberries, and broccoli.
Vitamin E works alongside vitamin C to protect the skin from oxidative damage and support repair. Food sources include almonds, sunflower seeds, and avocado.
Probiotics, specifically strains that reduce gut inflammation and support the microbiome rather than histamine-producing strains, are a meaningful part of the gut-skin protocol. The right strains depend on the individual microbiome picture, which is why testing before supplementing makes a significant difference to outcomes.
What a Treatment Approach Actually Looks Like
Addressing the gut-skin connection in clinic involves working in phases. The first priority is identifying what is happening in the gut through functional testing, looking at the microbiome, intestinal permeability, inflammatory markers, and digestive function. From that picture, we can see exactly which bacteria are overgrowing, which beneficial species are depleted, and what the inflammatory load looks like.
From there, treatment typically involves clearing any significant dysbiosis or overgrowth, repairing the gut lining, rebalancing the microbiome with targeted probiotic and prebiotic support, supporting liver clearance and hormone metabolism, addressing the nutritional deficiencies that are impairing skin function, and working on the stress and lifestyle factors that are keeping the cycle going.
Dietary changes layer in alongside this. Reducing sugar, dairy, and ultra-processed foods removes the primary fuel sources for inflammatory dysbiosis and reduces the insulin spikes that drive androgen production. Building in a wide variety of plant foods feeds the beneficial bacteria that regulate inflammation and support oestrogen clearance. These are not restrictions for the sake of restriction. They are targeted shifts that change the internal environment the skin is responding to.
The skin is often the last place to show improvement and the first place people look for it. In practice, gut symptoms, energy, and mood tend to shift first, and the skin follows as the underlying picture resolves.
Working Together
If your acne has been a long-term frustration and surface treatments have only ever managed it rather than resolved it, looking at what is happening in the gut is a genuinely different approach to the one you have probably already tried.
I see clients in person at my Spotswood clinic in Melbourne and via telehealth across Australia. If you would like to understand what investigating the gut-skin connection looks like in practice, you can explore my functional testing page or read more about the range of conditions I work with on my conditions treated page.
Frequently Asked Questions About Acne and Gut Health
Can fixing my gut actually clear my skin? In many cases, yes, particularly where acne has been resistant to topical treatments or keeps returning after antibiotics. The gut-skin axis is well established in the research, and addressing dysbiosis, intestinal permeability, and hormone clearance through the gut consistently produces skin improvements that surface treatments cannot achieve on their own. The timeline varies depending on what is driving the acne, but gut-focused treatment addresses the source rather than the symptom.
How do I know if my acne is gut-related? Some patterns are particularly suggestive. Acne that flares after antibiotics, during or after periods of digestive disruption, or alongside bloating, irregular bowel habits, or food reactions often has a strong gut component. Hormonal acne along the jawline and chin in women, particularly where it tracks with the menstrual cycle, frequently involves the estrobolome and oestrogen clearance. A comprehensive stool test is the most direct way to assess what is happening and remove the guesswork.
Is dairy really linked to acne? For many people, yes. Dairy contains hormonal precursors that can stimulate androgen production and sebum output. It is also a common driver of gut inflammation and dysbiosis in people who have some degree of lactose or casein sensitivity. Reducing dairy is one of the most consistently useful dietary shifts in acne treatment, though it works best as part of a broader gut and hormonal approach rather than in isolation.
Why does my acne keep coming back after antibiotics? Antibiotics reduce the bacteria involved in acne lesions in the short term, but they also significantly disrupt the gut microbiome, depleting the beneficial species that regulate inflammation and keep opportunistic bacteria in check. Once the antibiotic course ends, the environment that allowed acne to develop is often still present, and in some cases the microbiome disruption makes it worse. Addressing the gut microbiome after antibiotic use is an important step in preventing recurrence.
Can stress really cause acne? Yes, through several mechanisms. Cortisol directly stimulates sebum production and drives inflammation in the skin. It also disrupts the gut microbiome and increases intestinal permeability, which loops back into the inflammatory and hormonal drivers of acne. Stress management is not a peripheral recommendation in acne treatment. For people whose skin is clearly stress-responsive, it is a central part of the protocol.
Kylie Sartori is a degree-qualified naturopath based in Spotswood, Melbourne, specialising in gut health, microbiome restoration, hormonal health, and skin conditions. She offers in-person consultations at her Spotswood clinic and telehealth appointments for clients across Australia.
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