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.

Sean “Diddy” Combs dropped to his knees and prayed in the courtroom after he was acquitted Wednesday of sex trafficking and racketeering charges that could have put one of hip-hop’s celebrated figures ...