SARAH VINE: I have tried all the weight loss jabs from Ozempic to Wegovy to Mounjaro... and THIS is the one that's easily the best
Every age has its great rivalries: Rome vs Carthage, Mozart vs Salieri, Shakespeare vs Marlowe, the Rolling Stones vs The Beatles. For us, halfway through the 2020s, it's Mounjaro vs Ozempic, the battle of the fat jabs.
In the first ever head-to-head clinical trial, tirzepatide (the active ingredient in Mounjaro) has been found to be almost 50 per cent more effective than semaglutide (the active ingredient in Ozempic and Wegovy).
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Data on Novo Nordisk experimental weight-loss drug show mostly mild side effects
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BreakingNews.ie
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Peptides or retinol? Here's what is best for banishing wrinkles
You may have heard peptides being touted as the latest 'age-reversing' ingredient you must incorporate into your routine, but equally, you may have no idea what they are. 'Peptides are short chains of amino acids – the building blocks of proteins like collagen and elastin,' explains cosmetic physician Dr Jessica Halliley. 'They send signals to the skin to promote repair and renewal, often with less irritation than retinol.' Advertisement Peptides promote collagen repair and cell renewal Once reserved for only dermatology offices, peptides are now cropping up in everything from firming serums to plumping eye creams and barrier-boosting moisturisers. So, are peptides the secret to plumping wrinkles? Or should we stick to retinol? Doctors and dermatologists explain the difference, when and how to use them. Peptides vs. retinol Peptides and retinol are both used for targeting wrinkles and anti-ageing, but understanding how they affect your skin differently is key. 'Retinol is a vitamin A derivative that speeds up cell turnover and stimulates collagen production, which can help improve skin texture and reduce fine lines, but often causes irritation initially,' explains Halliley. Advertisement 'Peptides are trending right now because they offer a gentler, science-backed route to firmer, healthier-looking skin – particularly for those who can't tolerate stronger actives.' Unlike retinol, which delivers visible changes more rapidly, peptides play the long game – supporting the skin's underlying structure without the sting. 'Retinol delivers quicker surface-level changes and is highly effective for reducing the appearance of fine lines by boosting epidermal turnover,' says dermatologist Dr Munir Somji. 'Peptides work deeper over time to support structural integrity and long-term firmness.' Advertisement In practice, pairing them means you get the best of both worlds, but it depends on your skin type and age. How to use peptides and retinol depends on your skin type and age 'Retinol has long been the gold standard for tackling fine lines and wrinkles thanks to its well-established ability to increase cell turnover and boost collagen,' says Halliley. 'That said, peptides can complement this process by supporting skin structure and hydration. In fact, using both together – for example, a retinol serum at night and a peptide-rich moisturiser or eye cream – can deliver synergistic benefits without overloading the skin.' How the ingredients affect collagen production Collagen is the key player in affecting how our skin visibly looks as we age. It is the most abundant protein in our body, making up about 30 per cent of all protein, and provides structure and strength to our bones, skin and muscles. Advertisement Both peptides and retinol are highly relevant for targeting collagen loss, which is the leading cause of wrinkles and sagging. 'Collagen is essential for keeping skin plump, firm and resilient – and it naturally declines as we age,' says Halliley. 'Retinol directly stimulates collagen synthesis by activating fibroblasts in the dermis, which makes it highly effective over time. 'Peptides help by mimicking natural cell signalling, encouraging the skin to repair and regenerate its collagen and elastin fibres.' In other words, retinol makes more collagen by waking up the cells that produce it, while peptides send signals to your skin to repair itself, thus increasing collagen production and other anti-inflammatory cells more holistically. Advertisement How to use if you have sensitive skin The elephant in the room, of course, is irritation. And while retinol may be celebrated as the hyperactive anti-ageing ingredient – it's also very strong. 'While retinol can cause redness, dryness and peeling – especially in the early stages – peptides are much more tolerable and suitable for sensitive or compromised skin,' says Halliley. For patients with rosacea, post-procedure redness or simply sensitive skin, Somji says peptides are best, as they offer anti-ageing and firming benefits without triggering inflammation. 'Peptides are often my go-to for patients recovering from clinical procedures or managing chronic skin concerns like rosacea,' he explains, 'they help reinforce the skin barrier and reduce inflammation, all while actively improving texture and tone.' What to use depending on your age Knowing whether to reach for peptides or retinol often comes down to your age and skin condition. For those just dipping into preventative skincare, peptides offer a gentle entry point. 'For younger skin or those in their late 20s to early 30s […] peptides can be a brilliant introduction to anti-ageing without the risk of irritation,' explains Halliley. The more mature your skin, the more retinol you can use 'More mature skin or those with visible photoageing [sun damage] can typically tolerate and benefit from retinol,' explains Somji, 'especially for pigmentation or textural concerns.' How to incorporate them into your routine Knowing all this, you now may be eager to douse yourself in bottles of peptides and retinol – but timing and layering is everything. 'My recommendation is to use retinol in the evening, when your skin is in repair mode, and always follow with a nourishing moisturiser,' says Halliley. 'Peptides can be used morning or evening – they're versatile, and you'll often find them in serums or moisturisers designed to strengthen and hydrate.' Lifestyle Dermatologists reveal what the TikTok banana peel... Read More Somji prefers a slower and more structured approach, and says to use retinol at night (as it increases your sensitivity to light) starting one to two times per week and following with a hydrating moisturiser. For daytime, he recommends layering peptides with antioxidants – like vitamin C – and SPF.
