Hyaluronic acid is a humectant that retains moisture, helping to keep hair hydrated and reduce frizz. Sodium hyaluronate is a common, cost-effective form of hyaluronic acid found in haircare products.

Eating a high-fat diet containing a large amount of oleic acid – a type of fatty acid commonly found in olive oil – could drive obesity more than other types of dietary fats, according to a study ...