I’m constantly fascinated by all of the random beauty products on Amazon that thousands of people lose it over enough to leave reviews. I’m pretty sure you can’t buy many of these random products anywhere but Amazon, and they’re all very affordable for what they are, e.g., retinol, eye cream, or, in this case, vitamin C serum.

I’m pretty loyal to luxury skincare products, but I’m always open to finding something just as good for less money. For several years, I’ve been switching between vitamin C serums that hover in the $65-to-$100 range, which I pay because I see it as an essential part of a skincare routine. It brightens your skin tone, pumps the skin with all-important antioxidants, reduces UV damage, firms, and shrinks pores. All of this in one product! Which is why I routinely pay the relatively high price for a bottle—until now. 

Nestled among the Amazon best sellers is something called TruSkin Vitamin C Serum for Face. The $20 serum is not only an excellent source of vitamin C, but it also contains moisturizing hyaluronic acid and vitamin E and is free of synthetic color additives, fragrance, and stabilizers. The price blew me away first, but then I saw that the serum has 14K reviews and nearly five stars, and I knew I had to add it to my cart immediately. Reviewers rave that it saved their skin, the results are fast, and it’s the best $20 they ever spent. My hopes are high for this Amazon purchase.

Shop the holy-grail vitamin C serum below, as well as more popular skincare products by TruSkin.

If your skin is on the dry side, this may be even better for you.

Given how expensive retinol usually is (and that this has 1.3K reviews and almost five stars), I’m very intrigued by this serum.

This cream contains 2.5% retinol, so you know it isn’t messing around.

One of the best lightweight moisturizers you can find comes in the form of hyaluronic acid. This serum is perfect for mixing into your other skincare products.

This anti-aging formula has everything I look for in an eye cream, and the ingredient list is quite clean.

If you don’t like fussing with a bunch of different products, this jam-packed serum has everything you need, including vitamin C, hyaluronic acid, and retinol.

If you’re obsessed with rose-hip oil and vitamin C like I am, you probably just added this to your cart like I did.

Next up: The best-selling mascara on Amazon is only $5.