Quick answer: Advanced glycation end products, or AGEs, are compounds that form when sugars bind to proteins, fats or DNA, both inside the body and in food cooked with high, dry heat. They build up with age, and higher levels are generally read as a sign of more glycation and oxidative stress. Researchers are still working out how much AGEs cause age-related changes rather than simply accompany them.
Key takeaways
AGEs form when sugars bind to proteins and build up over time.
Higher skin AGE readings are linked with higher mortality and heart events, especially in diabetes.
Blood AGE tests vary between labs, so results are read with HbA1c and other markers.
If you have seen advanced glycation end products, usually shortened to AGEs, on a lab panel, you may be wondering what sugar has to do with aging. AGEs form when sugars react with proteins, fats or DNA and the bonds slowly rearrange into stable, sticky compounds. The body makes them naturally, and they also arrive in food, especially food cooked with high, dry heat. Over many years they accumulate in long-lived tissues such as collagen, which is one reason researchers study them as a marker of how tissues age. The habits most often discussed around AGEs are cooking with moist heat more often, using gentler temperatures and shorter cooking times, eating plenty of vegetables, fruits and whole grains, and keeping blood sugar steady through movement and sleep.
This article is educational. It explains what the marker reflects and how researchers connect it to the deeper mechanisms of aging, so you can have a more informed conversation with your own provider.
What are AGEs and where do they come from?
There are two main sources. Inside the body, glucose and other sugars react with proteins, a process that runs faster when blood sugar stays higher. This is the same early chemistry that the HbA1c test captures, carried further over time. Outside the body, a study in the Journal of the American Dietetic Association found that dry-heat cooking raised the AGE content of foods by more than 10- to 100-fold compared with the uncooked state, and that animal foods high in fat and protein tended to be the richest sources. Vegetables, fruits, whole grains and milk contained relatively few AGEs, even after cooking.
Why are AGEs linked to aging and root causes?
A review in Cell Metabolism describes the buildup of AGEs on proteins, fats and nucleotides as an inevitable part of aging and notes that they are linked to many age-related changes. AGEs can cross-link collagen and other structural proteins, which helps explain why researchers connect them to stiffer blood vessels, skin and joints. That fits closely with what scientists call loss of proteostasis, the gradual decline in how well cells keep their proteins in good working shape. When damaged proteins pile up faster than the cell can clear them through autophagy and other recycling systems, function suffers.
AGEs also bind to a receptor known as RAGE, and that signal is tied to oxidative stress and chronic low-grade inflammation. Researchers link that ongoing inflammatory signaling to changes in how cells communicate with one another and to strain on mitochondria. The same review is candid that much remains to be learned about whether AGEs drive these changes or mainly accompany them, and a good share of the mechanistic work comes from laboratory and invertebrate models rather than people.
From a root-cause view, AGE load reflects both how much you make and how much you take in. Blood sugar that runs high over months raises internal production, so the same factors that shape HbA1c matter here, including sleep, stress, daily movement and muscle mass. Food quality and cooking style shape the dietary side, and the study above found that moist heat, shorter cooking times, lower temperatures and acidic ingredients such as lemon juice or vinegar meaningfully reduced the formation of new AGEs. Smoking is another everyday exposure often discussed in this area, and kidney function influences how efficiently AGEs are cleared. Seen this way, an AGE result is less about one food or one habit and more about the combined pattern of blood sugar, cooking, exposures and clearance over many years.
What does the research show about Advanced Glycation End Products?
In the Dutch Lifelines cohort, 77,143 adults without diabetes or heart disease had AGEs measured by skin autofluorescence and were followed for a median of about 9.6 years. The highest quarter was linked with higher cancer-related death even after adjusting for age, sex, smoking and body mass index (hazard ratio 1.7), while the link with heart-related death lost significance after full adjustment. Only 1.9% of participants died, which limits precision. (Boersma et al., 2024)
In 2,349 adults with type 2 diabetes from the same cohort, higher skin autofluorescence was linked with about 2.6 times the odds of a new heart event or death over about 3.7 years. The study measured AGEs in skin rather than blood, and follow-up was short. (Boersma et al., 2021)
These studies suggest skin AGEs track with long-term blood sugar exposure and aging, though blood AGE tests are less standardized.
Related reading
If you would like to explore related topics, my articles on HbA1c, glycemic control and aging and inflammaging go deeper. You can also see the specialty tests I commonly recommend on my functional labs page.
Common questions about Advanced Glycation End Products (AGEs)
What does a high AGE level mean?
A higher AGE level generally reflects more glycation, which tends to rise with higher blood sugar, AGE-rich foods and oxidative stress. Because AGEs are a large family of compounds, a result is best read alongside markers such as HbA1c.
Which foods are highest in AGEs?
Research found that animal foods high in fat and protein tend to be the richest sources, especially when cooked with dry heat. Vegetables, fruits, whole grains and milk contain relatively few AGEs, even after cooking.
Does cooking method change AGE intake?
Yes. Moist heat, shorter cooking times, lower temperatures and acidic ingredients such as lemon juice or vinegar meaningfully reduced the formation of new AGEs in research.
Sources
This article is for educational purposes only and is not medical advice. It does not replace an individual evaluation. Talk with your healthcare provider before making changes to your diet, exercise, supplements, or medications, especially if you are pregnant, nursing, or managing a health condition.
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