How SIBO Causes Acne, Rosacea, and other Skin Issues

When we think about skin health, we often turn our attention to topical products, diet, and hydration—but we rarely consider the health of our small intestine. Small Intestinal Bacterial Overgrowth (SIBO) is a recognized root cause behind various skin issues. Examples include acne, rosacea, eczema, psoriasis, and poor skin hydration. Understanding how SIBO affects skin health helps connect the dots between persistent digestive problems and chronic dermatological symptoms.

SIBO, Acne, Rosacea, and Hormonal Disruption

SIBO disrupts the body's ability to properly metabolize and eliminate hormones, particularly estrogens. When estrogen clearance slows due to poor gut function and impaired liver detox pathways, a state of relative estrogen dominance or increased androgen activity can result. This hormonal imbalance can increase testosterone levels, stimulating sebum production and clogged pores. These symptoms are hallmarks of acne. Additionally, studies have shown a strong correlation between SIBO and rosacea. In fact, SIBO treatment often leads to marked improvement in rosacea symptoms. After SIBO treatment, 50% of rosacea patients improved, suggesting bacterial toxins and the gut’s immune system plays a direct role in skin conditions.

SIBO, Eczema, Psoriasis, and Leaky Gut

SIBO often contributes to intestinal hyperpermeability (leaky gut). This breakdown in the gut wall allows bacterial toxins, undigested food particles, and inflammatory compounds to enter the bloodstream. These substances can trigger systemic immune reactions that manifest in the skin. In individuals predisposed to eczema or psoriasis, leaky gut acts as a significant environmental trigger, exacerbating flares and making skin less responsive to conventional treatment. By addressing SIBO and repairing the gut lining, many patients report improved digestion as well as calmer, clearer skin.

SIBO, Nutrient Malabsorption and Poor Skin Hydration

The bacterial overgrowth seen in SIBO interferes with nutrient absorption, especially of skin-critical vitamins and minerals such as vitamin A, vitamin D, zinc, and essential fatty acids. These nutrients are essential for skin repair, collagen synthesis, and barrier function. Additionally, SIBO can impair the body's ability to resorb water in the small intestine, contributing to systemic dehydration and dry, flaky skin. Even with a nutrient-dense diet and ample water intake, individuals with untreated SIBO may continue to suffer from dull, irritated skin due to internal malabsorption.

Treating SIBO for Clearer Skin and Better Digestion

Skin conditions are often a reflection of internal imbalance, and for many people, the root cause lies in the small intestine. If you're struggling with stubborn acne, rosacea, eczema, or psoriasis, and you've noticed accompanying bloating, gas, or digestive issues, it may be time to explore SIBO breath testing and treatment. Addressing the bacterial overgrowth not only improves gut function but can also unlock significant improvements in skin clarity, texture, and hydration.

Contact us to help determine if SIBO lies in the way of your skin health.