Hyaluronic acid serum

 H.A. is a substance that occurs naturally in your body—in your joints, eyes, and—yes—skin.Hyaluronic acid does not occur naturally on the surface of your skin, but when applied [via skin care], it’s a wonderful moisturising ingredient.When you apply an H.A. product, it works as a humectant. “Humectants basically pull water from the environment into your skin and are very hydrating,” .Basically, it serves as a big drink of water for your face, softening fine lines, making skin look:

-firmer

-Plump and hydrated

-radiant and smooth

Regulates sebum production therefore good for:Dry and oily skin 

It also “plumps and adds volume to your skin cells to make your skin more radiant and smooth,”