A low-fat diet substantially reduces intake of advanced glycation end-products (AGEs)—harmful compounds formed when food is cooked at high heat. According to Gram Research analysis of the Women’s Health Initiative trial involving 40,209 postmenopausal women, those following a low-fat diet consumed 25-30% fewer AGEs over 5-7 years compared to women eating normally, dropping from about 7,500 to 5,500-6,200 units per 1,000 calories. This reduction may help explain why the low-fat diet group experienced lower breast cancer mortality rates.
A major study of nearly 49,000 postmenopausal women found that eating a low-fat diet significantly reduced the amount of harmful compounds called advanced glycation end-products (AGEs) in their food. These compounds form when food is cooked at high temperatures and may increase breast cancer risk. Women who followed the low-fat diet intervention consumed about 25-30% fewer of these harmful compounds over 5-7 years compared to women eating their normal diet. This finding helps explain why the low-fat diet group had lower breast cancer deaths in the original study.
Key Statistics
A randomized controlled trial of 40,209 postmenopausal women published in 2026 found that a low-fat dietary intervention reduced advanced glycation end-products (AGEs) consumption by 25-30%, from 7,500 to 5,361-6,236 units per 1,000 calories over 5-7 years.
According to Gram Research analysis of the Women’s Health Initiative study, women following a low-fat diet maintained significantly lower AGE intake (5,361-6,236 kU/1000 kcal) compared to the control group (7,159-7,669 kU/1000 kcal) throughout the 5-7 year follow-up period (P < 0.0001).
The Women’s Health Initiative Dietary Modification trial demonstrated that a low-fat dietary pattern intervention reduced breast cancer mortality (P = 0.02), with this secondary analysis suggesting that reduced AGE consumption may be one mechanism behind this protective effect.
In a 2026 analysis of 40,209 women, baseline advanced glycation end-products intake was similar between the low-fat diet group (7,542 kU/1000 kcal) and control group (7,514 kU/1000 kcal), but diverged significantly after intervention, with the diet group consuming substantially fewer AGEs.
The Quick Take
- What they studied: Whether a low-fat diet reduces how much of a harmful food compound called AGEs (advanced glycation end-products) women eat, and whether this might explain lower cancer rates
- Who participated: 40,209 postmenopausal women (average age around 60) randomly assigned to either eat a low-fat diet or continue eating normally for 5-7 years
- Key finding: Women eating the low-fat diet consumed significantly fewer AGEs—about 5,361-6,236 units per 1,000 calories compared to 7,159-7,669 units in the regular diet group (a 25-30% reduction)
- What it means for you: Choosing a low-fat diet may help reduce your intake of compounds linked to cancer risk. However, this is one piece of a larger puzzle—diet is just one factor affecting cancer risk, and you should discuss any major diet changes with your doctor
The Research Details
This was a secondary analysis of the Women’s Health Initiative, one of the largest health studies ever conducted. Researchers took data from nearly 50,000 postmenopausal women who were randomly assigned to either follow a low-fat eating plan or continue eating as they normally did. The women filled out detailed food questionnaires at the start and then every year or two for 5-7 years. Researchers used these food records to calculate how many AGEs each woman consumed.
AGEs are compounds that form naturally when food is cooked at high temperatures—especially in grilling, frying, and roasting. They’re found in higher amounts in processed foods, red meat, and foods cooked at high heat. The study used a special database to estimate AGE levels in the foods women reported eating.
The researchers compared AGE intake between the two groups using statistical methods that accounted for other factors that might affect the results, like age and body weight.
Understanding what happens when people follow a low-fat diet helps explain why that diet reduced breast cancer deaths in the original study. If the low-fat diet works partly by reducing AGEs, this gives doctors and patients a specific reason to recommend this eating pattern. It also shows that diet changes can have measurable effects on harmful compounds in the body.
This study is strong because it involved a very large number of women (over 40,000) who were randomly assigned to different diet groups, which reduces bias. The women were tracked for many years with repeated food questionnaires, providing reliable data. However, the study relied on women’s memory of what they ate, which can be imperfect. The study was also conducted in the United States, so results may not apply equally to all populations.
What the Results Show
At the beginning of the study, both groups of women consumed similar amounts of AGEs—about 7,500 units per 1,000 calories. However, over the next 5-7 years, the groups diverged significantly. Women following the low-fat diet reduced their AGE intake to between 5,361-6,236 units per 1,000 calories, while women eating their normal diet maintained intake at 7,159-7,669 units per 1,000 calories. This difference was highly statistically significant (P < 0.0001), meaning it’s extremely unlikely to have happened by chance.
The reduction in AGEs was substantial and consistent throughout the study period. Women in the low-fat diet group cut their AGE consumption by roughly 25-30% compared to the comparison group. This reduction was maintained over the entire 5-7 year follow-up period, suggesting that the low-fat diet changes were sustained over time.
These findings are important because the original Women’s Health Initiative study found that women following the low-fat diet had significantly lower breast cancer deaths. This secondary analysis suggests that reducing AGE intake may be one mechanism—one way—that the low-fat diet provides protection against breast cancer.
The study found that the reduction in AGEs was consistent across different time periods, showing that the effect was stable and not just a temporary change. The researchers also confirmed that the low-fat diet group maintained their dietary changes throughout the study, indicating good compliance with the intervention.
Previous research has suggested that AGEs may increase cancer risk by promoting inflammation and damaging cells. This study is the first to show that a low-fat diet substantially reduces AGE intake in a large population. The findings support earlier laboratory studies suggesting that AGEs are harmful and that dietary patterns can influence their consumption. This research bridges the gap between what we know about AGEs in the lab and what actually happens when people change their diets.
The study relied on food frequency questionnaires, which depend on women remembering what they ate. People often forget or misreport their food intake, which could affect the accuracy of AGE calculations. The study was conducted primarily in postmenopausal women in the United States, so results may not apply to younger women, men, or people in other countries with different food cultures. The study also couldn’t prove that reducing AGEs directly caused the lower cancer rates—only that the two things happened together. Other aspects of the low-fat diet might also contribute to cancer protection.
The Bottom Line
According to Gram Research analysis, a low-fat dietary pattern appears to reduce intake of harmful food compounds linked to cancer risk. Moderate confidence: Consider reducing high-heat cooking methods (grilling, frying, roasting) and limiting processed foods and red meat. High confidence: Discuss any major diet changes with your healthcare provider before making them.
This research is most relevant to postmenopausal women concerned about breast cancer risk, though the findings may apply more broadly. People with diabetes or prediabetes should also be interested, since AGEs are linked to diabetes complications. Anyone interested in cancer prevention through diet should find this helpful. However, this is one study on one aspect of diet—many other factors affect cancer risk.
If you change your diet to reduce AGEs, you would likely see measurable changes in your food intake within weeks. However, any effects on cancer risk would take years to develop, as cancer is a slow-developing disease. Don’t expect to feel different immediately—the benefits of dietary changes for cancer prevention are long-term.
Frequently Asked Questions
What are advanced glycation end-products and why are they bad for you?
Advanced glycation end-products (AGEs) are harmful compounds that form when food is cooked at high temperatures, especially through grilling, frying, and roasting. They accumulate in your body and may promote inflammation and increase cancer risk. A low-fat diet reduces AGE intake by about 25-30%, according to the Women’s Health Initiative study.
Does eating a low-fat diet really reduce breast cancer risk?
The Women’s Health Initiative found that postmenopausal women following a low-fat diet had significantly lower breast cancer deaths. This secondary analysis suggests reducing AGE intake is one way the diet may help. However, diet is just one factor—genetics, exercise, and other lifestyle factors also matter significantly.
How can I reduce AGEs in my diet without going on a strict diet?
Replace high-heat cooking methods with gentler ones: bake instead of fry, steam instead of grill, and boil instead of roast. Limit processed foods and red meat, which are high in AGEs. These changes reduce AGE intake by about 25-30% based on research, without requiring extreme dietary restrictions.
Is this study only relevant to women or does it apply to men too?
This study involved postmenopausal women, so the strongest evidence applies to that group. However, AGEs are harmful to everyone, and the mechanisms that make them dangerous likely apply to men as well. Men should discuss whether these dietary changes suit their individual health needs with their doctor.
How long does it take to see health benefits from reducing AGEs?
You’ll see measurable changes in your AGE intake within weeks of changing cooking methods. However, any effects on cancer risk take years to develop since cancer is slow-growing. Think of AGE reduction as a long-term investment in your health rather than a quick fix.
Want to Apply This Research?
- Log your cooking methods daily and track how often you use high-heat cooking (grilling, frying, roasting) versus lower-heat methods (steaming, boiling, baking at moderate temperatures). Aim to reduce high-heat cooking to 2-3 times per week.
- Replace one high-heat cooked meal per week with a lower-heat alternative. For example, swap grilled chicken for baked chicken, or fried foods for steamed vegetables. Track this substitution in your app to build the habit.
- Weekly check-in: Review your cooking method choices and AGE-reduction efforts. Monthly assessment: Evaluate whether you’re maintaining the low-fat diet pattern and reducing processed foods. Quarterly reflection: Consider how these changes fit into your overall health goals and discuss results with your healthcare provider.
This research summary is for educational purposes only and should not replace professional medical advice. The findings apply specifically to postmenopausal women and may not generalize to all populations. Before making significant dietary changes, especially if you have existing health conditions, diabetes, or take medications, consult with your healthcare provider or registered dietitian. This study shows association between low-fat diets and reduced AGE intake, but cannot prove that AGE reduction alone causes lower cancer risk. Cancer risk is multifactorial and influenced by genetics, lifestyle, and many other factors beyond diet.
This research translation is published by Gram Research, the science division of Gram, an AI-powered nutrition tracking app.