Dry, aging complexion? Meet ectoin, the science-backed skin care star derms recommend.

As a 52-year-old beauty editor, I'm always on the lookout for fresh ingredients that actually help improve the texture, bounciness and overall dewinesss of my ever-wizening skin. My latest discovery is ectoin (pronounced eck-toe-in), a powerhouse molecule that's been popping up everywhere in skin care circles this year. It's currently one of the buzziest anti-aging ingredients on social media and, according to experts, may be among the most effective too.

Ectoin was first discovered in bacteria that live in harsh environments like deserts and saltwater lakes. It was key to the microorganisms' survival, both stabilizing cells and protecting them from extreme UV radiation and severe dryness. Studies show these protective qualities can actually transfer to human skin: "Ectoin helps maintain moisture in the skin by stabilizing proteins and cell membranes and forming a 'water shell' around cells," says Dr. Mina Amin, a board-certified dermatologist at California Dermatology Specialists. "It also improves skin-barrier function and reduces transepidermal water loss."

What makes ectoin perhaps most appealing to beauty brands is how it naturally works as a multitasker, mimicking the positive effects of multiple popular skin care ingredients at once. Like niacinamide, it soothes skin. Similar to hyaluronic acid, it draws in moisture. By increasing skin bounciness and brightness, ectoin even carries some of the same benefits as vitamin C.

Amin says ectoin can be especially helpful with decreasing skin irritation and inflammation, which is useful for those with conditions like eczema, rosacea and atopic dermatitis. "It can also help shield the skin from UV radiation, pollution, temperature extremes and oxidative stress," she explains. "And ectoin can help prevent the breakdown of collagen and elastin by reducing oxidative damage, which can therefore help with fine lines and loss of elasticity."

In terms of safety, unlike actives such as vitamin C, it is non-irritating and easily tolerated by even the most temperamental skin. "Ectoin is considered safe, especially for sensitive or reactive skin," says Amin. Though, she cautions, "To be on the safe side, if you're trying a new product with ectoin, it's smart to patch test — especially if you have sensitive skin."

Ready to test out this new skin care star for yourself? Below, I rounded up some of Amin's and my own favorite products containing ectoin.

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