According to Gram Research analysis, men and women’s bodies respond differently to high-fat diets, with female mice gaining significantly more body fat and showing different heart and kidney changes than males in a 2026 study. A medication called dapagliflozin improved blood sugar control only in male mice, suggesting that men and women may need different treatment approaches for heart and kidney problems.
A new study found that men and women’s bodies react differently when eating high-fat diets, especially in their hearts and kidneys. Researchers fed mice either normal food or high-fat food and then tested a diabetes medication called dapagliflozin to see if it could help prevent problems. Female mice gained more body fat, while both sexes showed different changes in their hearts and kidneys. The medication helped some problems in male mice but not others. This research suggests that doctors may need different treatment approaches for men and women when dealing with heart, kidney, and metabolic problems.
Key Statistics
A 2026 research article in the American Journal of Physiology found that female mice on a high-fat diet accumulated significantly more body fat compared to males eating the same diet, indicating potential sex differences in how bodies respond to unhealthy eating.
In the same 2026 study, dapagliflozin medication improved glucose tolerance and kidney function markers only in male mice with high-fat diet-induced metabolic problems, not in females, suggesting sex-specific treatment responses.
A 2026 animal study revealed sex differences in early cardiovascular-kidney-metabolic syndrome development, including differences in heart lipid composition, kidney structure, and mitochondrial function between males and females exposed to identical high-fat diets.
The Quick Take
- What they studied: How men and women’s bodies respond differently to high-fat diets and whether a heart-kidney medication helps prevent problems
- Who participated: Male and female laboratory mice that were fed either normal chow or a high-fat diet starting at 6 weeks of age, with some receiving medication treatment for 8 weeks
- Key finding: Female mice gained significantly more body fat from the high-fat diet and showed different heart and kidney changes compared to males, and a medication called dapagliflozin only helped some problems in males
- What it means for you: This research suggests that men and women may need different medical approaches when treating heart, kidney, and metabolic problems, though more human studies are needed to confirm these findings
The Research Details
Researchers used male and female mice to study how a high-fat diet affects the heart and kidneys differently between sexes. Starting at 6 weeks old, some mice ate normal food while others ate a diet that was 60% fat—similar to an unhealthy human diet. After 12 weeks on these diets, the high-fat diet mice were split into two groups: one received dapagliflozin (a medication used to treat diabetes and heart problems) and one received a placebo for 8 weeks. The researchers measured body fat, heart function, kidney structure, and various chemical markers in the blood and tissues.
This approach is important because most previous research on heart and kidney disease has focused mainly on male animals, which may not fully represent how women’s bodies respond. By studying both sexes side-by-side under identical conditions, researchers could identify real differences in how men and women develop these health problems. The study measured multiple systems—metabolism, heart function, kidney structure, and cellular energy production—to get a complete picture of disease development.
Understanding sex differences in disease development is crucial because men and women often experience heart and kidney diseases differently in real life. If treatments work better for one sex than the other, doctors need to know this to provide the best care. This research helps explain why a one-size-fits-all approach to treatment may not be effective for everyone.
This study was conducted in a controlled laboratory setting with standardized conditions, which allows researchers to isolate specific variables. However, because it used mice rather than humans, results may not directly translate to people. The medication doses used were relatively low, which may explain why the treatment effects were modest. The study provides valuable preliminary evidence that should be followed up with human research.
What the Results Show
Female mice on the high-fat diet accumulated significantly more body fat compared to males eating the same diet. This suggests that women’s bodies may be more prone to weight gain from unhealthy eating patterns. Both sexes showed changes in heart function, but females had more noticeable problems with how their hearts pumped blood. In the kidneys, males and females showed different patterns of damage and stress, including differences in how their cells produced energy and handled oxidative stress (cellular damage from normal metabolism).
When researchers gave dapagliflozin to the high-fat diet mice, the results were mixed. The medication improved blood sugar control and kidney function markers only in male mice, not females. This suggests the medication may work differently depending on biological sex. The researchers noted that the medication levels in the blood were lower than expected in both groups, which may explain why the overall benefits were modest.
The study found sex differences in specific kidney proteins and genes involved in glucose handling and sodium transport. Female mice showed greater changes in their heart’s lipid composition (the fats that make up heart tissue), suggesting their hearts were more affected by the high-fat diet. Mitochondrial function—the energy-producing machinery in cells—was impaired differently in males versus females, indicating that cellular energy production is affected differently by diet based on sex.
Previous research has shown that men and women experience heart disease and diabetes at different rates and with different symptoms, but most animal studies have only used males. This research confirms that these sex differences appear early in disease development and affect multiple organ systems. The findings align with clinical observations that women often develop metabolic problems differently than men, though the exact mechanisms are still being discovered.
This study used mice, not humans, so results may not directly apply to people. The medication doses were lower than typically used in human patients, which may explain why benefits were limited. The study only looked at early stages of disease development, so it’s unclear if these sex differences persist as disease progresses. The sample size of mice was not specified in the abstract, making it difficult to assess statistical power. Finally, the study was relatively short (8 weeks of treatment), so long-term effects remain unknown.
The Bottom Line
Based on this preliminary research, doctors should consider that men and women may respond differently to high-fat diets and may benefit from different treatment approaches for heart and kidney problems. However, these findings are from animal studies and need confirmation in human research before changing clinical practice. People concerned about heart and kidney health should focus on proven strategies: maintaining a healthy weight, eating less saturated fat, exercising regularly, and managing blood pressure and blood sugar.
This research is most relevant to people with risk factors for heart and kidney disease, particularly women who may be more prone to weight gain and metabolic problems. Healthcare providers treating cardiovascular and metabolic conditions should be aware that sex-based differences may affect treatment outcomes. This is less immediately relevant to people with no metabolic risk factors, though the findings suggest preventive approaches may need to be tailored by sex.
Changes in body composition and metabolic health typically take weeks to months to develop and improve. In this study, changes were observed over 12-20 weeks. In humans, meaningful improvements in heart and kidney function from lifestyle changes or medication usually take 8-12 weeks to become apparent, though some benefits may appear sooner.
Frequently Asked Questions
Do men and women gain weight differently on high-fat diets?
Research suggests women may be more prone to body fat accumulation from high-fat diets. A 2026 study found female mice gained significantly more fat than males on identical high-fat diets, though human studies are needed to confirm this pattern in people.
Why do some medications work better for men than women?
Biological differences between sexes affect how medications are processed and work in the body. A 2026 study found dapagliflozin improved blood sugar control only in males, not females, suggesting sex-specific responses to treatment that doctors should consider.
Are heart and kidney problems different in men versus women?
Yes, research shows men and women develop heart and kidney problems differently. A 2026 study found females showed greater heart function changes and different kidney damage patterns than males on identical high-fat diets, suggesting sex-based disease development.
Should I follow different health advice based on my sex?
While this research suggests potential sex differences in disease development, current health recommendations for diet, exercise, and weight management apply to everyone. Talk to your doctor about personalized approaches based on your individual risk factors and medical history.
What does this research mean for treating metabolic syndrome?
This 2026 study suggests doctors may need to consider sex when choosing treatments for heart, kidney, and metabolic problems. However, more human research is needed before changing clinical practice based on these preliminary animal study findings.
Want to Apply This Research?
- Track body weight, waist circumference, and energy levels weekly, noting any differences in how quickly these metrics change compared to others of the opposite sex following similar diet changes
- Use the app to log dietary fat intake and monitor how your body responds over 8-12 weeks, paying attention to whether your response matches typical patterns for your sex
- Set up monthly check-ins to review trends in weight, energy, and metabolic markers (if available through your healthcare provider), comparing your personal trajectory to sex-specific benchmarks
This research was conducted in laboratory mice and has not been tested in humans. The findings are preliminary and should not be used to change your medical treatment without consulting your healthcare provider. If you have concerns about heart, kidney, or metabolic health, speak with your doctor about appropriate screening and treatment options for your individual situation. This article is for educational purposes only and does not constitute medical advice.
This research translation is published by Gram Research, the science division of Gram, an AI-powered nutrition tracking app.