As a shopping editor, some of the best product recommendations come from my colleagues. And while chatting with a colleague from a different magazine, she mentioned their readers can't get enough of Medix 5.5 Retinol Cream With Ferulic Acid. My interest was immediately piqued; I had to know more, especially since it's now on sale during Amazon's Big Spring Sale.

Many minutes spent reading reviews later, I was convinced this unassuming bottle of lotion is one of Amazon's best-kept secrets. It's earned more than 19,300 five-star ratings from shoppers, with a significant number from people in their 50s, 60s, and 70s — all of whom testify the $19 formula provides "overnight results" for smoothing crepey skin and wrinkles. A 63-year-old said the cream made a "drastic improvement" in their skin texture, and a 71-year-old confirmed the "miraculous" effect within three days is "truly unbelievable."

Medix 5.5 Retinol Cream

Myriad users said the cream beats Crépe Erase's $84 formula thanks to the former's combination of age-lifting retinol, antioxidant-laden ferulic acid, fruit and flower extracts, and a bevy of heavy-duty moisturizers. Shea butter, glycerin, aloe, and vitamin E serve up hydration, and synthetic beeswax means the suppleness sticks around.

That aside, people are highly impressed by the $19, made-in-Chicago hit. As one customer titled their review, it turned them into a "hot grandma," and left them feeling much more confident about wearing sleeveless shirts and sundresses. Drooping skin all over another person's body tightened with repeated use over the course of a month, leaving them incredulous that the cream doesn't cost $200.

"After only three uses, I can already see the crepey skin on my upper arms filling out and my sagging jawline has lifted significantly," said a last fan. "My face looks 10 years younger." If you're interested in similar results, order a bottle of the cruelty-free lotion while it's just $19 during Amazon's Big Spring Sale, and browse through more of the brand's skincare gems, below.

Medix 5.5 Vitamin C and Turmeric Cream

Medix 5.5 Glycolic and Lactic Acid Body Wash