“Keto crotch” is an informal term for an unusual vaginal odor reported by some individuals on a ketogenic diet. This side effect, though widely discussed anecdotally, has not been extensively studied. It typically refers to a strong odor, sometimes with changes in discharge, and is often a temporary side effect.
What is “Keto Crotch” and Why It Happens
The ketogenic diet changes how the body produces energy by drastically reducing carbohydrates and increasing fat. This shifts the body into ketosis, where it breaks down fats for fuel. During ketosis, the liver produces acidic ketone bodies. These compounds are excreted and may contribute to altered body odors, including those perceived vaginally, described as sour, fishy, or metallic.
Significant dietary changes can influence the vaginal microbiome. A healthy vagina maintains an acidic pH, which helps foster beneficial bacteria like lactobacilli and deter harmful microorganisms. A ketogenic diet may alter vaginal pH, making it more alkaline. This shift can disrupt the microbial balance, potentially leading to bacterial overgrowth and a distinct odor and discharge, often resembling bacterial vaginosis.
Strategies for Managing Odor
For many, altered vaginal odor from the ketogenic diet is temporary, resolving as the body adapts to ketosis. Maintaining adequate hydration helps flush out metabolic byproducts. Use mild, unscented soap or water for external hygiene. Avoid douching or harsh internal cleansers, as these can disrupt the vaginal microbiome and exacerbate odor issues. Wearing breathable cotton underwear also promotes a healthy environment.
Adjusting dietary composition can also help manage this odor. Incorporating more alkaline-forming foods into a ketogenic diet may help support a balanced vaginal pH. While maintaining ketosis, ensure a consistent intake of electrolytes, such as sodium, potassium, and magnesium. Probiotics may help restore beneficial bacteria in both the gut and vagina. These strategies support the body’s transition and help mitigate odor concerns.
When to Seek Medical Advice
While an altered vaginal odor on a ketogenic diet can be a temporary and benign side effect, it is important to distinguish it from more serious health conditions. If the odor persists, worsens, or is accompanied by additional symptoms, consult a healthcare professional. Warning signs include unusual discharge (especially changes in color or consistency), itching, burning, pain during urination or intercourse, redness, swelling, or fever.
These symptoms may indicate a vaginal infection, such as bacterial vaginosis, a yeast infection, or a sexually transmitted infection. Bacterial vaginosis, for example, shares symptoms like a strong, fishy odor and abnormal discharge with “keto crotch.” A healthcare provider can diagnose the cause of the symptoms and recommend appropriate treatment.