The Gut-Skin Axis
If you've tried every cream on the shelf for a stubborn skin condition and nothing quite sticks, it's worth looking somewhere you might not expect: your gut. There's a growing, genuinely well-documented body of research on the gut-skin axis, the two-way relationship between what's happening in your digestive system and what shows up on your face.
How the Gut Affects Your Skin
Your gut lining is normally a selective barrier: it lets nutrients through while keeping bacteria, toxins, and undigested food particles contained. When that barrier becomes compromised, often called increased intestinal permeability, or more informally, "leaky gut", inflammatory compounds can pass into the bloodstream and trigger a systemic immune response.
And that inflammation rarely stays politely confined to the gut. Research increasingly links gut microbiome imbalance to eczema, acne, and psoriasis specifically, including recent studies using genetic methods to establish that the relationship isn't just correlation, it's genuinely causal in at least some cases. The "leaky gut" label itself is debated in conventional medicine, and its role in specific conditions like psoriasis isn't as firmly established as the broader gut-skin connection, but the underlying idea, that gut bacterial balance shapes skin inflammation, has solid and growing scientific backing behind it.
What Disrupts Gut Balance
- A diet low in fibre and high in sugar or processed food
- Chronic stress (see our Stress and Blood Sugar page, stress affects your gut and your skin through overlapping pathways)
- Repeated antibiotic use
- Food sensitivities
Supporting Your Gut
- A varied diet rich in fibre, vegetables, and whole foods
- Fermented foods, or a targeted probiotic supplement like our Multibiotic, though probiotics aren't one-size-fits-all, different strains suit different people, so don't be discouraged if the first one you try doesn't help
- Bone broth and gelatin, traditionally used to support gut lining repair. slippery elm and marshmallow root are also fantastic and vegetarian.
- Reducing the inflammatory foods covered on our Foods for Healthy Skin page
It's worth understanding the role of good bacteria in the gut. Firstly, good bacteria keep bad bacteria in check, most people understand this. If you lack good bacteria it's easy for harmful microbes like candida to get out of control. Candida put roots into the gut wall and literally creates leaky gut issues. It's one of many bad bacteria that can get out of control if your good bacteria are lacking.
But good bacteria also perform a secondary function. They create a slimy layer on the gut wall, literally lubricating the whole process. Without this lubrication, as food passes through it can scrape against the gut wall lining, creating leaky gut and gut inflammation.
It's acknowledged that good bacteria have many functions that we are just starting to understand. when you start looking at the gut-brain axis things get really interesting. This little page is no where near a comprehensive guide, but I hope it conveys the importance of looking after you gut when you want to improve your skin.
Seeding and Eco System
If you look at a range of probiotics they will all contain different strains of bacteria. Your gut flora is made up of hundreds of different strains. For this reason, if you are trying to improve gut health by way of probiotics it's useful to buy several different brands and rotate them daily. This way you will introduce more strains and more biodiversity. Supplementing with probiotic foods like kefir and kombucha, sauerkraut and other ferments also broadens that bio diversity. Think about it like seeding a meadow with a thousand different plants and don't be disheartened if you buy one product and don't see good results.
The Gut-Skin Axis and Skin Conditions
If you're managing a persistent skin condition, addressing gut health alongside your skincare routine is well worth exploring as part of the bigger picture. A nutritional therapist is often the right person to help investigate and support gut and microbiome balance, most GPs receive very little training in this specific area.
Many people come to a natural approach precisely because conventional treatment hasn't worked, or has caused problems of its own, topical steroid withdrawal is a real and increasingly recognised reaction to long-term steroid use, even though it remains a debated area within dermatology.
If that's part of your story, seeking out a practitioner genuinely experienced in your specific situation, whether that's TSW, gut health, or your particular condition, matters far more than any one job title or a generic "see your doctor." That said, a GP still has a role worth not skipping: they can rule out any serious conditions that genuinely do need medical treatment rather than dietary support alone.