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.

Dry skin happens year-round, but it’s particularly bad in the winter months. If you’re looking to hydrate your complexion, there are two moisturizing ingredients that get the job done. But when it ...