Now let’s move on to the public’s favorite moisturizer with hyaluronic acid. As mentioned earlier, HA is what we call a humectant, meaning it draws water into the skin, resulting in a plumper, fresher complexion. You actually already have HA in your body in your joints, eyes, and so on, but most of it is in your skin.

HA has been added to serums of all kinds for years, but recently its popularity is due to the fact that this ingredient has been singled out as a separate serum, used before other creams and oils.

Not everyone needs a supplement of hyaluronic acid, but it can be helpful for those with dry, irritated skin, or those who simply want a little extra hydration. Fortunately, it combines well with most ingredients, so it’s also a pretty handy ingredient.