We all want beautiful skin. Especially as we get older, we need skin products to help our face maintain its youthful appearance. There are so many skin products out there, it's hard to know which ones to use. One really excellent skin product is hyaluronic acid serum. Although acid might sound scary and not something you want to put on your face, hyaluronic acid is actually a gentle acid that occurs naturally in the body. It's in our skin already. The reason babies have such soft skin is because of how much hyaluronic acid is in their skin. You have less when you get older, and that's why rubbing a hyaluronic acid serum on your face can help you obtain a more youthful glow. There are a lot of hyaluronic acid serums out there, but we want to make sure you know which ones are the best. Read on for our reviews of the 5 Best Hyaluronic Acid Serums. Cosmedica Skincare Hyaluronic Acid Serum Pure and SimpleThis hyaluronic acid serum is pure, natural, and effective.Best OverallFind on Amazon Our pick for best hyaluronic acid serum is this one from Cosmedica Skincare. The hyaluronic acid is 100 percent pure. No fillers here. The hyaluronic acid is all-natural and organic, so it really is the best quality. This serum hydrates and moisturizes to improve skin texture and brightness. This serum holds 1,000 times its weight in moisture, so the impact will last for a long time. This serum reduces the look of aging by reducing fine lines and wrinkles. You will notice the effects in softer and plumper skin. This serum is gentle and can be used by those with sensitive skin. Pros All-natural and organic 100 percent pure Gentle Cons Not as good in dry climates L’Oreal Paris Hyaluronic Acid Serum Skin SolutionThis hyaluronic acid goes deep to work its magic on multiple skin levels.Best DepthFind on Amazon This is a lovely hyaluronic serum from L’Oreal Paris. It goes to work immediately, bringing its moisturizing and plumping power to your skin. This serum gets skin tightened and glowing in no time. This serum combines different molecular-sized hyaluronic acid for a more comprehensive effect. How deep into your skin the hyaluronic acid molecules go is controlled by the size of the molecules. This serum mixes low-molecular 0.5 percent hyaluronic acid with high-molecular 1.0 percent hyaluronic acid for a 1.5 percent solution that can hydrate multiple levels of your skin. Pros Works fast Works on multiple levels of your skin Combines low-molecular and high-molecular hyaluronic acid Cons The dropper is a little shorter than the bottle Neutrogena Hydro Boost Hyaluronic Acid Serum Boost Your SkinHydrate your skin intensely with this hyaluronic acid serum.Fastest WorkingFind on Amazon For another terrific hyaluronic acid serum, consider this one from Neutrogena. It is part of their Hydro Boost line of products, which are formulated to bring extreme hydration to your skin. This serum will do just that and do it very well. It instantly absorbs into your skin and gets to work immediately. This serum hydrates your skin to the point that it bounces back and glows. There is no oil in this serum, so you don’t have to worry about it making your skin greasy. This serum is also non-comedogenic, so you don’t have to be concerned about it clogging your pores. Pros Absorbs instantly Oil-free Non-comedogenic Cons Not cruelty-free Asterwood Naturals Hyaluronic Acid Serum Organic HydrationThis organic, vegan hyaluronic acid serum does wonders for your skin.Most NaturalFind on Amazon This is an amazing hyaluronic acid serum from Asterwood Naturals. It works really nicely to even your skin tone for a brighter, more balanced complexion. This serum is organic and contains no oils, fragrances, parabens, nor sulfates. So you can feel good about putting it on your skin because it contains only the highest quality ingredients. This serum is also vegan and has never been tested on animals, so you can feel good about buying it knowing it is cruelty-free. Asterwood Naturals is so confident you’ll love this serum, it comes with a 100 percent no-questions-asked moneyback guarantee. Pros Organic Vegan and cruelty-free 100 percent moneyback guarantee Cons May not be good for acne-prone skin InstaSkincare Hyaluronic Acid Serum Instant GlowBrighten up with this beautifying hyaluronic acid serum.Easiest To UseFind on Amazon For another incredible hyaluronic acid serum, check out this one from InstaSkincare. It uses clinical strength hyaluronic acid to moisturize your skin. InstaSkincare guarantees you’ll get results with this serum. And with good reason; this is a very powerful serum. Put it on twice a day to combat wrinkles, redness, and visible pores. This serum works on all skin types – oily, dry, or somewhere in the middle. So it’s really one-size-fits-all with this serum. It contains all-natural ingredients and has been dermatologically tested, so you can count on it to work. Pros Works on all skin types All-natural Dermatologically tested Cons Might sting a little at first Frequently Asked Questions What does it mean when it says the serum is 100 percent hyaluronic acid? It means the hyaluronic acid in the serum is 100 percent pure. It does not mean the entire serum is only hyaluronic acid. Most serums are either one or two percent hyaluronic acid. How do I apply hyaluronic acid serum? Clean and dry your face and neck. Using the dropper, drop a few drops on your fingers and rub a thin layer on your face and neck. Let it absorb before applying moisturizer or other skin products. Can I apply hyaluronic acid serum under the eye area? When applying hyaluronic acid serum to your face, it is recommended to avoid the eye area. 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