Tangy, fermented, or sour :

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It’s very common for vaginas to produce a tangy or sour aroma comparable to the smell of fermented foods. These are perfectly healthy adjectives to describe the vaginal odor created by your normal (good) bacterial flora. The presence of these Lactobacilli, which are the same strain of bacteria found in fermented foods like yogurt and sourdough bread, are what make the vagina smell this way. Lactobacilli help keep your vagina healthy by producing lactic acid, hydrogen peroxide, and other substances to keep harmful bacteria at bay. They help maintain your vaginal pH levels by keeping it on the acidic side – between 3.8 and 4.5 for non-menopausal women and between 4.5 and 6 for those in menopause – to ward off the overgrowth of yeast and other harmful bacteria.