Mild Cleanliness: Acidic soap is typically formulated with a mild formula that can help remove impurities, excess oil, and dirt from the skin without excessively removing the skin's natural moisture. Compared to traditional soap, they are milder and suitable for sensitive or delicate facial skin. Reduce pigmentation: Certain acids, such as kojic acid, crotonic acid, or glycyrrhetinic acid, are known for their whitening properties. These acids can reduce the occurrence of pigmentation, such as dark spots, sunburn, or uneven skin tone, by inhibiting the production of melanin. Brightening skin tone: Acid soap may enhance skin tone by promoting epidermal peeling. Acids such as glycolic acid or lactic acid can help remove dead skin cells, presenting a smoother and brighter skin tone. Moisturizing the skin: Some acidic soaps contain moisturizing ingredients, such as hyaluronic acid, glycerin, or natural oils, which help moisturize and nourish the skin. These ingredients can help maintain the skin's water balance, making it soft and elastic after cleansing. Usage: Acidic soap is usually used similarly to regular facial soap. Moisturize the face with water, lather the soap in your hands, and then gently massage the facial skin in circular motions. Thoroughly rinse with water and gently pat dry the skin with a towel. Please be sure to follow the specific instructions for using the soap used. When using acidic soap, pay attention to the skin's tolerance and any potential sensitive reactions. At the beginning, use soap once a day or every other day. If your skin can tolerate it well, you can gradually increase the frequency of use. If there is any irritation, redness, swelling, or discomfort, stop using and consult a dermatologist. Please note that the effectiveness of acidic soap may vary depending on individual skin type and condition. It is recommended to consult a dermatologist or skincare specialist for personalized advice and recommendations based on your specific needs.