Lactic acid is a colorless organic acid that occurs naturally in the body, particularly during intense exercise. It is produced when the body breaks down carbohydrates for energy without enough oxygen, a process known as anaerobic metabolism. This can lead to the accumulation of lactic acid in muscles, which is often associated with the burning sensation during strenuous activities. In addition to its role in the body, lactic acid is also used in various industries. It serves as a food preservative, flavoring agent, and is involved in the production of biodegradable plastics. Furthermore, lactic acid is utilized in skincare products for its exfoliating properties.