1. Not recommended for use: Expired toners may undergo changes in composition due to prolonged storage, including bacterial growth or chemical instability, which may cause skin discomfort or allergic reactions when used on the body.
2. Safety risk: Even if expired toners do not appear or smell significantly different, their internal properties may have undergone changes that are detrimental to skin health. Using such products may increase the risk of skin damage.
3. Environmental Protection and Conservation: For personal health and environmental considerations, it is recommended to discard expired toner and purchase new products for use. At the same time, pay attention to checking the shelf life of other cosmetics and skincare products at home to avoid using expired products.