Lactic acid is widely used in the food and beverage industry as an acidulant and preservative, enhancing flavor and extending shelf life. It helps control pH and inhibits the growth of spoilage-causing microorganisms in products like dairy, meat, and canned goods. In the pharmaceutical sector, it is used in topical formulations for skin exfoliation and treatment of acne due to its mild keratolytic properties. It also plays a role in the production of biodegradable polymers such as polylactic acid (PLA), which is used in eco-friendly packaging, medical implants, and 3D printing materials. Additionally, lactic acid is utilized in the cosmetics industry to adjust acidity and improve skin hydration. Its low toxicity and natural origin make it suitable for use in cleaning products and as a green alternative to harsher acids in industrial processes.