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At 52, the entertainment icon seems to be aging in reverse, maintaining the same flawless complexion she had when she released "Jenny from the Block" back in 2002.
Sharing her skincare secrets in an IGTV video posted on Monday, the "Marry Me" star calls the anti-aging serum her "old faithful."
This stuff is "magic in a bottle," a bare-faced Jennifer tells the camera.
On location shooting a movie, the actress admits the filming schedule has left her feeling a "bit run down" and tired. "The face takes a beating," she says. "Not getting enough sleep, it's a whole thing."
To give her skin a reboot, "I went to my old faithful, That JLo Glow," she says. "I've put it on the past few days, and I got to tell you, I woke up today, and I was like, 'God, you look amazing!' [...] It looks like I'm rejuvenated!"
"This is no bullshit; this is not me trying to sell anything to you," she tells the camera. "This is me sharing with you [my skincare] secret. [...] Look at my skin! It has cleared up; it is glowy, it is luminescent, I just want to keep putting on more and more."
In another IGTV video, Jennifer has called the serum her "secret sauce."
"It is the magic ingredient, the secret sauce, the fountain of youth, the vitamins for your face," she says. "There's not a day; there's not a morning; there's not an evening; there's not a moment where I'm not putting this on."
A mega-rich gel serum that's designed to brighten, tighten, and lift the skin, the JLo Beauty Serum provides all-day hydration and is great for anti-aging, as it targets fine lines and wrinkles.
"I put it everywhere," the "Hustlers" actress tells her Instagram followers. "This serum is honestly one of my favourite things."
What people are saying
Earning an average rating of 3.9 stars from Sephora shoppers, reviewers say the JLo beauty product is the "holy grail of serums."
That JLo Glow Serum "does some heavy lifting," writes one shopper "It balances out my skin tones and removes redness."
"This serum is one of the best I have ever used," raves another Sephora reviewer. "My skin literally glows and is bright every time I use it."
The serum delivers a blend of squalane, extra virgin oil, and leaf extract to the skin, improving hydration and texture.
"I'm very dry, and this gives my skin the hydration it craves," writes another shopper.
Based on a clinical study, 91 per cent of participants noted an improvement in the look of their skin's firmness and elasticity, and 100 per cent agreed it improved skin hydration and texture.
However, a handful of reviewers note that as it's an anti-aging product, "younger ladies might not need or want such a heavy serum."
To shop JLo's other favourite age-defying products, scroll below.