With all of the hype around this moisture-boosting ingredient, consumers find it challenging to understand which products give the best results. But thanks to beauty communities on Reddit, Makeup Alley and Sephora message boards, skin care lovers can share what is and isn’t working for them.

One of the top questions on the message boards discussing hyaluronic acid is, “Is it worth it?” Does it really make a difference whether you purchase a $7 product or upgrade to a $300 serum? We talked to dermatologists to find out.