Collagen supplements promise youthful skin and glossy hair – but do they really deliver on the hype?
Each morning for the past year, while her coffee brews and toast browns, Libby Brodie has started her day with a ritual that’s become second nature: she stirs a generous scoop of collagen powder into a glass of water and drinks it down in one go. “It’s probably the only thing I really do for my skin,” admits Brodie, 42, who otherwise keeps her skincare simple, just washing her face with hand soap at night and applying basic moisturizer in the morning.
Her supplement, which costs £32 for a month’s supply of 40 servings, contains “bovine hydrolysed collagen,” a protein sourced from cows. The brand behind it claims it can enhance skin elasticity, strengthen hair and nails, support joint mobility, and even help with menopause symptoms. Brodie remains uncertain if her skin has truly improved — “though people tell me I look ten years younger,” she says — but she has noticed one thing: her hair feels noticeably thicker.
Brodie’s not alone. Collagen has exploded into a booming global industry of powders, capsules, gummies, and drinks. According to YouGov data, one in five adults in the UK has taken some wellness supplement in the past six months, and collagen dominates the market — especially among women, 15% of whom have tried it, compared with 5% of men.
Celebrity endorsements have helped fuel the craze. A-listers like Jennifer Aniston and Victoria Beckham swear by it, and collagen-infused coffee has become one of the year’s most fashionable wellness fads. You can even find it on supermarket shelves: Sainsbury’s offers a £4 “collagen raw pressed juice,” Lidl stocks “collagen water,” and coffee chains like Joe & the Juice let you add a scoop to your smoothie for under £1. Some brands are pushing the concept even further with “collagen brownies.” It’s also sneaking into beauty products — mascaras, lipsticks, and foundations now boast collagen as a key ingredient. But here’s where things get controversial: does any of it truly work, or are we just buying into clever marketing?
Understanding Collagen and Its Role
Collagen is one of the body’s most vital proteins, giving skin its firmness, joints their flexibility, and nails and hair their resilience. Think of it as the scaffolding that keeps tissues strong, elastic, and youthful. But around our mid-twenties, collagen production begins to decline, leading over time to wrinkles, thinning hair, and weaker nails. Lifestyle factors like sun damage or smoking can speed up this loss, and during menopause, the drop in estrogen worsens it even more.
The collagen in supplements typically comes from animal sources — most often cows, pigs, chickens, or fish. It’s extracted from connective tissue, bones, and skin, then broken down into smaller fragments called peptides that are easier for the human gut to absorb. Once digested, these peptides pass into the bloodstream, where they may support tissue repair. At least, that’s the theory.
When it comes to collagen-infused creams and serums, however, scientists are skeptical. The collagen molecule is simply too large to penetrate the skin’s surface, meaning those expensive collagen creams might moisturize but won’t actually boost collagen levels deep beneath the surface. Still, celebrity faces and glossy branding sell the dream.
The Evidence Problem
So, what does science actually say? According to Dr. Anjali Mahto, consultant dermatologist at Self London, “Most collagen studies are small, involving fewer than 100 participants — and many are funded by the very companies selling these products.” Unsurprisingly, results tend to look modest. Even when improvements are found, she explains, they’re often minimal — such as a 5–10% uptick in skin hydration, too subtle for most people to even notice.
Some dermatologists argue that the perceived benefits could be more about psychology than biology. Dr. Beibei Du-Harpur, clinical lecturer at King’s College London, points out that “there’s actually no collagen in hair or nails themselves.” While collagen may influence the scalp and cuticles, there’s no robust scientific proof it boosts hair or nail growth directly. “The real power of collagen,” she suggests, “lies in its marketing appeal — people love shortcuts and quick fixes.”
That said, these supplements aren’t typically dangerous. Still, as Du-Harpur notes, “The supplement industry operates with limited regulation. Many products aren’t rigorously tested for side effects or contamination.” The irony, she adds, is that people fear prescribed medications but rarely question the safety of supplements bought online or in stores.
The Hidden Variables
For those convinced that collagen is transforming their skin, Mahto offers another explanation. “Regular collagen users are often the same people who already follow disciplined skincare habits — daily sunscreen, retinoids, healthy diets, and good sleep routines,” she explains. Those lifestyle factors likely have far more measurable impact than a spoonful of powder stirred into coffee.
So, could collagen still be worth trying? Maybe — but not for everyone. It might help some individuals who lack protein in their diet or want an extra boost for joint health, but its skin-enhancing effects remain scientifically unproven. And this is the part most people miss: sometimes the glow we credit to a supplement actually comes from overall consistent self-care.
What do you think? Are collagen supplements an overhyped wellness fad, or have you personally seen real benefits? Should brands be held to tougher scientific standards before marketing anti-aging claims? Share your thoughts — the debate’s far from over.
