Collagen supplements have been popular among skincare fanatics for years now, but how do they work and which ones should you be using?
For women who want a youthful glow, no matter their age, collagen is a great addition to any skincare routine.
Plenty of Australian stars swear by the ingredient, including The Bachelor's Anna Heinrich.
"You've got to be very efficient with your skincare as a mum," she told Now To Love in 2021, adding that she's been using collagen supplements for years.
But studies have found that ingestible collagen tends to be more effective than most topical collagen products, hence the popularity of collagen supplements.
So what is collagen and what does it actually do for your skin?
Collagen is a protein that occurs naturally in the human body and is the main structural component of skin, constantly breaking down and renewing.
Over time that process begins to slow, leading to fine lines and wrinkles, a loss of firmness and the sensation of "sagging" skin.
WATCH: The most searched skincare ingredients explained. Story continues after video.
Collagen supplements are believed to help boost the collagen renewal rate, leading to improved skin firmness and elasticity, though there is limited evidence-based research to support these claims.
Even so, there's plenty of anecdotal evidence from women who say collagen supplements reinvigorated their skin.
Plus, with so many celebrities crediting the "miracle" ingredient for their glowing skin, why not give it a try?
With that in mind, these are our favourite collagen supplements for firm, youthful skin.
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