Sodium DL-lactate is widely used as a pH regulator and preservative in the food and beverage industry. It helps maintain acidity levels and extends shelf life by inhibiting the growth of bacteria and mold. In meat and poultry products, it acts as a flavor enhancer and moisture stabilizer, improving texture and reducing spoilage.

In cosmetics and personal care products, sodium DL-lactate functions as a skin conditioning agent and humectant, helping to retain moisture and support skin barrier function. It is commonly found in lotions, creams, and cleansers for its mild exfoliating and hydrating properties.

It is also used in pharmaceutical formulations as a buffering agent to maintain stable pH in injectable solutions and oral medications. Additionally, it serves as a biodegradable chelating agent in some cleaning products, helping to soften water and improve cleaning efficiency without harming the environment.