pH is important when formulating body hygiene cosmetics. In the vaginal and vulvar area, a healthy pH range in women of childbearing age is remarkably acidic (between 3.8 and 4.5), thanks to the presence of lactic acid produced by the genus Lactobacillus bacteria. This acidic pH acts as a natural defence against other pathogenic bacteria and fungi growth. However, during the pre-pubescence stage, it is normal for the pH to be more neutral, i.e. higher. This is why it is recommended that, during infancy, the cleanser used for the external genital area should be specific and formulated with a compatible pH. This type of cleanser also provides comfort in case of mild vulvar irritation or discomfort.