Beauty This Hyaluronic Acid Serum Works So Well, Shoppers Would "Bathe in It" — and It's Just $20 A dermatologist confirms hyaluronic acid’s potency for beating signs of aging. By Taylor Lane Taylor Lane Instagram Taylor Lane is a Maryland-based freelance writer who covers all things beauty, fashion, and shopping. She was previously an Ecommerce writer for InStyle. InStyle's editorial guidelines Published on October 1, 2021 @ 07:00PM Pin Share Tweet Email We independently research, test, review, and recommend the best products—learn more about our process. If you buy something through our links, we may earn a commission. Photo: Getty Images There are plenty of anti-aging serums living on beauty shelves that promise immediate and visible results. Few actually deliver on their promises, but Amazon shoppers claim that this $20 bottle of hyaluronic acid serum is "all you need." Meet SenAllis Cosmetics' Hyaluronic Acid Serum, a potent formula that treats signs of aging while simultaneously hydrating skin. The moisturizing serum promises to reduce fine lines, wrinkles, dark spots, and smooth uneven skin tone. It also revives dry skin and eliminates dullness by adding ample hydration, and can even help eliminate acne. And what makes the serum a bottle of liquid magic? Hyaluronic acid, one of skincare's holy grail ingredients. If you aren't familiar with the benefits of hyaluronic acid, here's what you should know. First, it's a humectant, (which means it traps and holds water, locking moisture into the skin. Although it might seem impossible to achieve a naturally dewy and plump complexion, one dermatologist confirms that it is possible. "Hyaluronic acid found in moisturizers and serums can help to reduce wrinkles and fine lines by creating a barrier that retains water in the skin," Dr. Lian Mack previously told InStyle. The SenAllis Cosmetics serum has plenty of reviews from Amazon customers who say it "changed my skin immediately," and that it's "worth every penny." Courtesy Shop now: $20, amazon.com "[It's the] fountain of youth in a bottle!" one customer wrote, adding, "What a real game changer!! I looked at my picture from one year ago and took a picture yesterday. It was remarkable how youthful my face looked. It was smooth and looked fresh and younger." "I was skeptical of how well this product would work for me. As it turns out, I can't get enough of it. I would bathe in it if I had enough of it," a second shopper raved. They also said: "I use it on my face, neck, and lips twice daily. I love the consistency. It's scent-free & it is now my key product in keeping my skin plump and supple." People Say This $14 Retinol and Hyaluronic Acid Moisturizer Reduces Fine Lines Within Two Weeks Another reviewer also noted the serum has a "great consistency, not thin and watery." And as for the benefits they saw from the serum? They added: " It absorbs very quickly into my skin and leaves it very smooth to the touch. It also helps to diminish the fine lines around my eyes, and when I apply makeup base, it goes on smoothly with better coverage." Impressed? Head to Amazon now to snag your own bottle of the fountain of youth for under $20.