Can I still use expired soap?

If we suddenly find that the soap we usually use seems to have exceeded its shelf life, but it has not been used up yet, people dare not use such soap, fearing that using expired things will harm their bodies. Soap is used to wash hands, and some people use soap to take a bath, but for expired soap, many people are afraid that such things will hurt their skin if used to wash hands or take a bath, so can expired soap still be used?

According to the normal production date, it has a shelf life and will expire, but there is no scientific evidence to prove whether expired soap produces harmful substances.

Under normal storage conditions, the shelf life of soap is generally three years. Transparent soap that has exceeded its shelf life is at risk of becoming rancid (commonly known as "deterioration"). In mild cases, yellow and black spots will appear on the surface of the soap, while in severe cases, oily sweat will appear. The detergency of rancid transparent soap will decrease with the degree of rancidity. If the appearance and smell of transparent soap that has exceeded its shelf life have not changed significantly, you can continue to use it; if the soap has become sour, it cannot be used.

Soap is an indispensable daily cleaning product. The history of people using soap can be traced back to Italy before Christ. Since the 1980s, soap has gradually begun to be widely used in my country. An artificially synthesized detergent appeared in the Song Dynasty. It was made by crushing natural soapberries, adding various medicinal petal powders, and making them into balls for use in washing the face and body. Some people directly boil the soapberry with water, add medicinal petals, and then take a bath. Plant weak alkaline soap (soap) is one of the skin and hair washing and care products and is a daily consumer product. Some manufacturers use sodium fatty acids and other surfactants as the main raw materials to make soap, add quality improvers and appearance improvers, and then process and shape the resulting products. However, due to the high pH content, the skin cannot tolerate it for a long time, so they can only be used to wash clothes. The pH value of plant weak alkaline soap is low, which can be accepted by human skin for a long time. In addition, the various nutrients and vitamins contained in the plants can nourish and care for the skin.

In fact, soap is just a daily necessities, not food, so expired soap can still be used again. Don't worry, using expired soap will not bring any adverse effects to your body. When using soap, it is best to smell it first. If you smell any bad or strange smell, it is best not to use such soap anymore.