The Derma E Retinol Concentrated Serum is on sale for $15 at Amazon. The anti-aging skin care serum is made with powerful ingredients, like retinol, hyaluronic acid, and niacinamide. Snag the retinol serum shoppers swear by for smooth skin while it’s still marked down.

Others claim their forehead lines "basically disappeared" after a week of use.

In the vast, dizzying world of skin care, there are few ingredients that have as much name recognition as retinol. Considering the vitamin A derivative’s long list of time-rewinding benefits (it tackles everything from dark spots to wrinkles), it’s not difficult to imagine why so many anti-aging products are centered around it.

One such product is Derma E’s Retinol Concentrated Serum, currently on sale for $15 at Amazon. Designed to reduce the appearance of fine lines and wrinkles, the marked-down serum lightly exfoliates, smooths, and plumps the skin. But it really caught my eye for two reasons; first, as someone with at-times sensitive skin, I was relieved to read that fans with similar skin types have confirmed it’s not overly drying, and second, its $15 price tag rivals other retinol serums in the triple digit price point. 

Derma E Retinol Concentrated Serum

$20 $15 at Amazon

In case you need a quick refresher, retinol, this serum’s titular ingredient, not only boosts collagen production, but also improves the turnover of skin cells. In addition to retinol, the formula contains dermatologist-approved favorites like hyaluronic acid, which our bodies produce less of as we age, and niacinamide, which is well-known for its brightening capabilities. 

When it comes to visible results, those who have tried the serum can’t stop singing its praises. One shopper declared the product is like “a time machine for your face” and said it gives the skin “a radiant glow,” while a 45-year-old who’s spent “hundreds” on alternatives concluded that “none of them have delivered like this one.” 

Those who are impatient with testing new products (I’m with you!) will also be pleased to learn that this serum works shockingly fast. One shopper who “highly” recommends the elixir said they “noticed improvement in fine lines” after about two weeks of use. Even more impressive, another reviewer said their forehead lines “basically disappeared” after about a week of use.

Head to Amazon to snag the fast-acting, line-smoothing Derma E Retinol Concentrated Serum while it’s just $15, and check out other retinol skin care picks, below. 

CeraVe Resurfacing Retinol Serum

$22 $19 at Amazon

EnaSkin Naturals Retinol Serum

$37 $14 at Amazon

CeraVe Skin Renewing Retinol Serum

$25 $23 at Amazon