CLAIM:
Eating excess sugar can accelerate skin ageing by damaging collagen through a process called glycation. This may make the skin less elastic, lead to earlier wrinkles, and contribute to a more aged appearance over time.
FACT:
Current scientific evidence suggests that excessive sugar intake may contribute to skin ageing through processes like glycation and oxidative stress, which can affect collagen and skin elasticity over time. However, experts and studies emphasise that ageing is multifactorial, and factors such as UV exposure, smoking, genetics, stress, sleep, and overall lifestyle also play a major role in visible skin ageing.
You must have noticed people around you cutting down on sugar for various health benefits - from weight loss and diabetes control to better energy levels. But what if sugar is also quietly affecting how fast your skin ages?
A recent viral Instagram post is now drawing attention to the possible connection between sugar intake and visible signs of ageing. In a recent post by the Instagram page ‘Ig_WeightLoss’, claims about sugar accelerating skin ageing have gained traction online.
The post suggests that excess sugar intake may damage collagen, weaken skin elasticity, and contribute to wrinkles and premature ageing over time.
The post mentions that “Eating sugar is quietly ageing your face faster,” and explains that the process behind this is called 'glycation'. According to the post, “when you eat excess sugar, it binds to proteins in your body, especially in your skin,” and “attacks your collagen,” which it describes as the component that keeps skin “smooth, firm, and youthful.”
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It further claims that sugar weakens collagen “at the source", making the skin “stiff and fragile” instead of soft and elastic. The post adds that “this is how wrinkles form faster,” arguing that damaged collagen cannot repair properly, leading to “deeper and earlier wrinkles.” To simplify the comparison, it describes healthy skin as a “rubber band” that stretches and snaps back, while “glycated skin cracks under pressure” like a “dry twig.”
Does sugar speed up ageing?
Current scientific evidence supports the idea that excessive sugar intake may contribute to glycation and oxidative stress, both of which are associated with skin and tissue ageing. However, researchers consistently emphasise that ageing is multifactorial, and visible skin ageing cannot be attributed to sugar consumption alone.
One of the earlier studies exploring this process was a 1994 study on human collagen and glycation. The researchers observed that, “with age, human collagen demonstrates, amongst other changes, reductions in solubility, elasticity and permeability.” The study explained that many of these changes may be linked to “non-enzymic glycosylation (glycation)” - a process involving the spontaneous addition of sugar molecules to proteins. According to the researchers, glycation in collagen increased with age and was associated with “increases in cross-linking and collagen intermolecular spacing,” changes that can affect the structure and flexibility of tissues.
Building on this, a 2007 study examined how glycation affects reconstructed skin models. Researchers noted that “glycation products accumulate during the ageing of many slowly renewing tissues, including skin.” The study found that artificially glycated collagen produced biological and structural changes that “closely mimicked chronologic ageing of skin in vivo.” These included alterations in collagen structure, increased production of metalloproteinases linked to tissue breakdown, and changes resembling naturally aged skin. The authors concluded that their findings “strengthen the importance of glycation reactions in skin ageing.” However, the study was conducted in vitro, meaning it used laboratory skin models rather than living human subjects.
Further explaining the biological mechanism, a 2010 review highlighted how sugars may affect collagen and elastin fibres in the skin. The review stated that “glucose and fructose link the amino acids present in the collagen and elastin that support the dermis, producing advanced glycation end products or ‘AGEs'". According to the paper, these cross-links make collagen fibres “incapable of easy repair,” potentially affecting skin flexibility and maintenance over time. The review also stressed that glycation is not limited to the skin alone and may influence several tissues in the body, especially when combined with factors such as ultraviolet exposure.
Another 2010 review similarly described skin ageing as a “very complex ageing process” involving both intrinsic factors like genetics and extrinsic influences such as UV exposure, pollution, and lifestyle habits. The paper noted that AGEs “provoke biological modifications” including oxidative stress, activation of inflammatory molecules, and degradation of the extracellular matrix. It also explained that ultraviolet exposure may worsen AGE-related effects by generating reactive oxygen species in the skin.
Research in later years expanded the discussion beyond cosmetic ageing to broader metabolic health effects. A 2017 review examining dietary sugars and AGEs reported that excessive intake of sugar-added foods and beverages, particularly fructose, may contribute to the formation of AGEs in the body.
The paper noted that AGEs can interfere with “lipid synthesis, inflammation, antioxidant defences, and mitochondrial metabolism,” potentially contributing to tissue injury and organ dysfunction. At the same time, the researchers cautioned that “high-quality clinical trials are needed” to better determine how much dietary sugar directly contributes to these effects in humans.
More recent evidence also points toward a possible connection between AGEs and skin health. A 2022 review stated that AGEs are “stable compounds produced under non-enzymatic conditions” through reactions between sugars and proteins, and that they “can also affect the different structures and physiological functions of the skin.” The paper further explained that AGEs may influence collagen structure, oxidative stress, and inflammation, though it described the mechanisms as “complicated and cumbersome.”
A recent 2026 literature review also linked high sugar intake with accelerated ageing pathways. The study found that “advanced glycation end-products generated from high sugar consumption lead to cellular damage and oxidative stress,” while also contributing to inflammatory responses.
According to the review, clinical evidence indicates an association between high-sugar diets and markers of ageing, including “reduced skin elasticity and increased incidence of age-related diseases.” However, the authors also stressed that “further research is needed” to better understand these mechanisms and evaluate interventions.
Expert insights
Fauziya Ansari, Dietitian at Apollo Spectra Hospital, Mumbai, explained that excessive sugar intake may contribute to skin ageing through a process known as glycation.
According to her, “excess sugar damages collagen and elastin,” the proteins responsible for keeping the skin “firm and elastic.” She noted that this can eventually contribute to concerns such as wrinkles, sagging, dullness, and reduced skin elasticity over time.
Speaking about whether reducing sugar can help, Ansari said that cutting down on excess sugar intake “slows down the collagen damage seen due to glycation” and may support healthier skin ageing in the long run.
However, she clarified that collagen damage that has already occurred “cannot be completely reversed.” She added that maintaining “a well-balanced diet, proper hydration, and a dedicated skincare routine” can help support overall skin health.
Ansari also stressed that sugar is not the only factor associated with premature ageing. According to her, “constant UV exposure, smoking, stress, poor sleep, pollution, and genetics” can also significantly affect skin ageing. She advised people not to neglect skincare and recommended regular consultations with dermatologists, along with limiting foods such as “biscuits, desserts, cakes, sodas, colas, and candies” as part of a healthier lifestyle approach.
Adding to this, Dr Katheeja Nasika, Consultant, Department of Dermatology at Rela Hospital, Chennai, said that there is “strong biochemical evidence” supporting the role of glycation in skin ageing. According to her, advanced glycation end products (AGEs) attach to collagen fibres, making them “less flexible” and “a little stiff,” after which “degradation breakdown happens.”
She explained that while studies do show “a strong association” and substantial observational evidence linking high sugar intake with skin ageing, “we do not have large RCTs to prove that only sugar leads to problems like ageing, wrinkles and loss of elasticity.”
Speaking about whether reducing sugar can reverse ageing effects, Dr Nasika said that lowering sugar intake may help “partly,” but not completely reverse existing damage because “advanced glycation products are relatively stable.” However, she pointed out that the skin remains biologically active and undergoes continuous collagen turnover. “When we reduce sugar intake, obviously, the further damage can definitely be cut down,” she said.
Dr Nasika also stressed that the issue is not about “eating one dessert” occasionally, but rather the “chronic intake of high sugars” and high-glycaemic foods over long periods. At the same time, she emphasised that sugar is only one part of a much larger picture. According to her, “the first important thing is UV exposure,” and protective measures such as sunscreen, umbrellas, and shielding from ultraviolet rays play a major role in reducing long-term skin ageing.
She further noted that genetics can significantly influence how quickly people age, adding that “there are people with good, gifted genes who age a little later than others.” Smoking, she added, is another major contributor because “smoking leads to collagen degradation.” She also encouraged maintaining “a good antioxidant-rich diet” for overall skin health.
Dr Shireen Furtado, Senior Consultant – Medical & Cosmetic Dermatology at Aster CMI Hospital, Bangalore, also explained that reducing sugar intake can help “limit the generation of new AGEs” and protect the remaining healthy collagen from future damage. However, she noted that “extremely damaged collagen or long-term damage of collagen is generally not responding well to reversing treatments.”
Dr Furtado also highlighted that the body naturally continues to “break down and replenish” collagen over time, and this process can be supported through “good nutrition, hydration, sleep, and sun protection.” According to her, while skincare products and healthier lifestyle habits may improve the skin’s appearance, they “will not be able to make the deeply glycation-related ageing processes completely disappear.”
This story is done in collaboration with First Check, which is the health journalism vertical of DataLEADS