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As any skin-care obsessive is well aware, summer and winter routines look very different from one another. During icy months, your lightweight moisturizer will need to be swapped out for a heavy-duty ...

Polyglutamic acid (often abbreviated to PGA) holds up to 10 times more moisture than cult skincare ingredient hyaluronic acid (or HA), making it one of the most powerful hydrating ingredients around ...

Is vitamin C serum or hyaluronic acid better for your skincare routine? If you’re looking to achieve better skin, you should look for two key ingredients when buying skincare products: hyaluronic acid ...

I’ve said it before, and I’ll say it again: a hyaluronic acid serum is something every person should have in their medicine cabinet. Why? Because using a good hyaluronic acid serum is simply the most ...

Hyaluronic acid is one of those skincare ingredients that's actually worth the hype. Its presence in countless serums, moisturizers, and even cosmetics these days doesn't make it a gimmick — ...

Now’s the time to add a hyaluronic acid serum into your skincare routine. Julia Cherruault for Observer There are few skincare ingredients that are quite as universally beloved as hyaluronic acid, and ...

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