PEOPLE Examined Retinol Serum Is on Sale at Amazon for $20

As a beauty writer and skincare aficionado, I’m always asked what the best product is for wrinkles — and my answer is always retinol (a.k.a. vitamin A).

The beauty ingredient is known for helping exfoliate skin and improve collagen production, which typically results in brighter skin and diminished fine lines and hyper pigmentation. Dermatologists previously told us that it can also slow down signs of aging, so you can target multiple issues without a million skincare products.

You don’t have to invest a lot in a quality retinol serum either — Amazon’s beauty store is filled with budget-friendly options, including Neutrogena’s Rapid Wrinkle Repair Retinol Face Serumwhich is on sale for just $20 (our favorite formula for smoothing fine lines).

Neutrogena Rapid Wrinkle Repair Retinol Face Serum

Amazon

We’ve tested more than 30 retinol formulas and consider Neutrogena’s the best for fine lines. It’s made with a fragrance-free formula that our testers noted was gentle on their skin, which is a bonus if yours is sensitive. You don’t have to worry about cakey makeup either since it’s fast-absorbing, so you can layer your foundation, concealer, and blush on smoothly. The formula also consists of ultra-moisturizing hyaluronic acid, which can help quench dehydrated skin.

Amazon shoppers can’t get over the fast results, with one shopper writing“You can notice a wrinkle difference almost immediately after (the) first use.” Another reviewer loved that their face “feels so smooth after each use” and added that the texture is “lightweight and not sticky at all.”

You won’t see major results after one application, but our testers found consistent use worked magic. One “fan for life” echoed our findings and found the formula most effective when applied before facial moisturizer to help “keep your wrinkles at bay.” Not convinced? Another reviewer shared“I’ve been using this for years and no one can guess my age.”

Shop the Neutrogena Rapid Wrinkle Repair Serum while it’s still available and check out more retinol creams on sale at Amazon below.