The hidden way sugar ages your skin

We already know that too much sugar isn’t great for your waistline, but what many people don’t realise is that it can quietly wreak havoc on your skin, too.
 
From dullness and fine lines to loss of firmness, your sweet tooth may be ageing your skin in ways even your most expensive serums simply can’t fix.
 
"Skin ageing isn't only influenced by external factors," says west London-based Aesthetic and Menopause Expert Dr Ivona Paravic. "Dietary habits, particularly excessive sugar intake, play an important role in how the skin changes over time."

How sugar accelerates skin ageing 

Every time sugar levels rise, (apart from the pancreas working hard to bring it down) sugar molecules begin attaching themselves to proteins in the body, including collagen and elastin. This process is known as glycation.

"This leads to the formation of compounds called advanced glycation end products, ironically, referred to as AGEs," explains Dr Ivona. "These compounds alter the structure and function of collagen and elastin fibres, making them stiffer and less flexible."

Collagen is the scaffolding that keeps skin firm, smooth and resilient. Once glycation begins affecting these fibres, skin gradually loses its ability to repair and regenerate itself.

The result? Earlier fine lines, reduced elasticity, and skin that appears thinner, duller and less resilient over time. Recovery can also become slower as the skin’s underlying support structure weakens. “These effects are not immediate,” says Dr Ivona. “They develop gradually as the underlying structure of the skin changes.”

The “sugar damage” doesn’t stop there 

Glycation also drives oxidative stress, triggering enzymes that actively break down collagen while reducing the skin's capacity to produce new collagen. Meanwhile, excess sugar is linked to low-grade inflammation throughout the body.

"This low-grade inflammation can damage skin cells, impair healing, and contribute to a dull or uneven skin appearance. Over time, chronic inflammation is recognised as a factor in accelerated skin ageing," shares Dr Ivona.

Sugar can also disrupt hormonal pathways. "Elevated sugar intake increases insulin levels, which may influence androgen activity and stimulate oil production. That can mean clogged pores, breakouts and, over time, pigmentation and scarring from repeated inflammation," says Dr Ivona.

Protecting collagen from the inside out

The good news? Skin ageing linked to glycation isn't entirely out of your control. Maintaining stable blood sugar levels can help preserve collagen and reduce inflammation. But Dr Ivona believes that protecting collagen also requires a more advanced, regenerative approach.

As a specialist in advanced aesthetics and holistic perimenopause and menopausal care, her treatment philosophy focuses on supporting skin health at a deeper level, rather than simply addressing visible signs of ageing.

"I focus on restoring skin quality and preserving collagen through evidence-based regenerative treatments," she explains. "The goal is not simply to chase lines or wrinkles, but to improve skin health and longevity."

Her approach combines advanced injectable techniques with personalised treatment plans designed to stimulate collagen production and improve overall skin quality. Rather than relying on quick fixes, Dr Ivona works with the body's natural regenerative processes to support stronger, healthier skin over time.

"Sugar changes the skin gradually and often silently," she says. "But understanding what’s happening beneath the surface gives us an opportunity to act. With the right nutrition and the right treatments, we can stimulate collagen regeneration, strengthen the skin’s foundation and help restore healthier, more radiant-looking skin."