Health
Carbohydrates and fiber linked to healthier aging in some groups, study finds
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Carbohydrates may have gotten a bad rap, but a new study from Tufts University finds that some are better than others — and that older women in particular could reap the benefits.
The research, which was recently published in the journal JAMA Network Open, found that daily consumption of fiber and “high-quality” carbs in midlife can contribute to healthier aging and overall better wellness among older females.
The researchers defined “healthy aging” as “the absence of 11 major chronic diseases, lack of cognitive and physical function impairments, and having good mental health.”
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The study was led by researchers from the Jean Mayer USDA Human Nutrition Research Center on Aging (HNRCA) at Tufts University and Harvard T.H. Chan School of Public Health.
“The main takeaway of the study is that consuming dietary fiber and high-quality carbohydrates — those from fruits, vegetables, whole grains and legumes — is associated with positive health status in older adulthood,” lead author Andres Ardisson Korat, a scientist at HNRCA, told Fox News Digital.
Daily consumption of fiber and high-quality carbs in midlife can contribute to healthier aging and overall better wellness among older females. (iStock)
“This includes the absence of chronic diseases and good physical and cognitive function.”
The researchers collected data from the Nurses’ Health Study, in which 47,000 women reported their dietary habits and health outcomes between 1984 and 2016, according to a Tufts press release.
The women ranged in age from 70 to 93 by the end of the study period.
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The researchers looked at the women’s consumption of dietary fiber, total carbohydrates, refined carbohydrates, high-quality (unrefined) carbohydrates, and carbohydrates from whole grains, fruits, vegetables and legumes.
They also analyzed glycemic index (each food’s score indicating how much it raises blood sugar) and glycemic load, which also takes into account portion size to provide a more accurate measure of each food’s impact on blood sugar.
“It’s not just about ‘carbs versus fats versus protein’ — it’s about what kind of carbs you’re eating.”
Women who consumed higher amounts of total carbohydrates; high-quality carbohydrates from whole grains, fruits, vegetables and legumes; and total dietary fiber in midlife were 6% to 37% more likely to have healthy aging and to score higher in several areas of mental and physical wellness, the study found.
Conversely, consuming refined carbohydrates — which come from added sugars, refined grains and potatoes — and starchy vegetables resulted in a 13% reduced chance of healthy aging.
Quality over quantity
“This study reinforces something many of us intuitively feel: quality matters,” noted Melanie Avalon, a health influencer, entrepreneur and biohacker based in Atlanta, Georgia.
“It’s not just about ‘carbs versus fats versus protein’ — it’s about the kind of carbs you’re eating.”
The researchers looked at the women’s consumption of dietary fiber, total carbohydrates, refined carbohydrates, high-quality (unrefined) carbohydrates, and carbohydrates from whole grains, fruits, vegetables and legumes. (iStock)
Avalon, who was not involved in the research, discussed some of the more notable findings with Fox News Digital.
“Perhaps most surprising was the finding that replacing just 5% of calories from carbohydrates with protein (from either plant or animal sources) was associated with lower odds of healthy aging by 7% to 37%,” she said.
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Avalon also noted that when carbohydrates were segmented by type — processed versus unprocessed — the associations with healthy aging were independent of BMI (body mass index), a metric typically closely linked to metabolic health.
“This suggests the effects of carbohydrate quality on healthy aging were not solely explained by weight-loss effects,” she said.
Based on the study findings, experts recommend focusing on whole, unprocessed foods, including fruits, vegetables, legumes and whole grains. (iStock)
The study also briefly touched on the controversial topic of seed oils.
“It found that higher intake of polyunsaturated fatty acids (PUFAs) — which are commonly found in seed oils — was linked to decreased odds of healthy aging, adding nuance to the ongoing debate,” Avalon added.
Based on the study findings, the biohacker recommends favoring whole, unprocessed foods, including fruits, vegetables, legumes and whole grains.
“Shop the perimeter of the grocery store for produce and whole grains, as well as the freezer aisles for frozen fruit and vegetables,” she suggested. “Consider dipping into the aisles only for pantry staples like canned legumes.”
For those who tolerate grains, people can reap the benefits of foods like quinoa, brown rice, oats and whole wheat products, Avalon noted.
“Prioritize fiber-rich foods and minimize refined carbohydrates like white bread, sugary beverages and ultraprocessed snacks,” an expert advised. (iStock)
“Prioritize fiber-rich foods and minimize refined carbohydrates like white bread, sugary beverages and ultraprocessed snacks.”
“These shifts can meaningfully support healthy aging and reduce the risk of chronic disease.”
Limitations and future research
One chief limitation of the study is that the participants were mainly white female healthcare workers.
“Because of the observational nature of the study, we cannot rule out confounding by other variables,” Korat said. “We would have liked to have data on men to evaluate the associations in this group.”
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The researchers called for more diverse studies that look closer at how dietary fiber and high-quality carbs contribute to healthy aging.
“We hope our findings help inform consumers about the importance of healthy diets in the promotion of healthy aging,” Korat added.
“Personalized nutrition, grounded in both science and self-awareness, may be key to thriving across the decades.”
“The more we can understand about healthy aging, the more science can help people live healthier for longer.”
Avalon added that while diet is “foundational,” it’s just one piece of the “healthy aging puzzle.”
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“Exercise, sleep, stress management and social connection all play a role,” she said.
“Ultimately, personalized nutrition, grounded in both science and self-awareness, may be key to thriving across the decades.”
Health
Diabetes surge among Americans could be driven by ‘healthy’ breakfasts, doctor warns
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Americans consume foods every day that are marketed as “healthy,” when they could be quietly destroying their health, one doctor warns.
Dr. Mark Hyman, physician and co-founder of Function Health in California, says that much of America’s daily diet is filled with unhealthy ingredients.
“The amount of refined starches and sugars that are everywhere is just staggering to me, given what we know about how harmful they are,” he shared in an interview with Fox News Digital. “I don’t think people really understand.”
Hyman, author of the new book “Food Fix Uncensored,” said he’s “astounded” by what people are eating, especially for breakfast.
“People just eat sugar for breakfast,” he said. “They have muffins, they have bagels, they have croissants, they have sugar-sweetened coffees and teas.”
Dr. Mark Hyman is the author of the new book “Food Fix Uncensored.” (Function Health; Little, Brown Spark)
In addition to the traditionally sweet options for breakfast, some cereal brands and breakfast staples have adopted new “protein-packed” menu items and products, following health trends that encourage eating more protein.
“Highly processed food is not food.”
“Now, we’re seeing this halo of protein in certain things,” Hyman said, mentioning that many protein smoothies are “full of sugar.”
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The doctor also noted that some popular cereals are now marketed as having protein in them. “My joke is, if it has a health claim on the label, it’s definitely bad for you,” he said.
Instead of starting the day with a “quick fix” or processed food, Hyman suggests choosing whole sources of protein and fat for breakfast, adding that “if there’s a little carbohydrate in there, it’s fine.”
More products marketed as “high protein” have cropped up on supermarket shelves. (iStock)
For his own breakfast, Hyman said he has a protein shake with whey protein, avocado and frozen berries. Eggs and avocados are also a great protein-and-fat combo option, he added.
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“It’s not that complicated — people need to just think about their breakfast not being dessert,” he said. “No wonder we’re in this cycle of obesity and diabetes. One in three teenage kids now has type 2 diabetes or pre-diabetes. That’s just criminal.”
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Instead of counting calories and being in a caloric deficit as a way to lose weight and stay healthy, Hyman instead suggests focusing on how certain foods make you feel and how they impact your health.
“When you look at the way in which different types of calories affect your biology, you can just choose what you’re eating, and then you don’t have to worry about how much,” he told Fox News Digital.
In addition to the traditionally sweet options for breakfast, some cereal brands and breakfast staples have adopted new “protein-packed” menu items and products. (iStock)
“For example, if you eat a diet that doesn’t cause your insulin to spike — which is low in starch and sugar, higher in protein and fat — you won’t develop those swings in blood sugar, you won’t develop the spikes in insulin, you won’t deposit hungry fat … You will break that cycle.”
People are more likely to “self-regulate when they eat real food” instead of processed foods, which “bypasses the normal mechanisms of satiety, fullness and brain chemistry,” according to Hyman.
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“Ultraprocessed food and junk food or highly processed food is not food,” he said. “It doesn’t support the health and well-being of an organism. It doesn’t do that. It does the opposite.”
Health
Scientists make startling discovery when examining prostate cancer tissue
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Small fragments of plastic were found in the tumors of most prostate cancer patients, according to a new study from NYU Langone Health.
In past studies, microplastics have been found in almost every human organ and in bodily fluids, but their impact on human health still isn’t fully understood.
The researchers analyzed tissue samples from 10 patients with prostate cancer who underwent surgery to remove the entire organ.
Using visuals of both benign samples and tumor samples, as well as specialized equipment, the scientists identified plastic particles in 90% of the tumor samples and 70% of benign tissue samples, according to the study press release.
In past studies, microplastics were found in almost every single human organ along with bodily fluids, even the placenta. (iStock)
The cancerous tissue contained on average more than double the amount of plastic as healthy prostate tissue samples, the study found. This equates to about 40 micrograms of plastic per gram of tissue compared to 16 micrograms.
Researchers avoided contaminating the samples with other plastics by substituting standard tools with those made of aluminum, cotton and other non-plastic material, the release noted.
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The scientists say this is the first direct evidence linking microplastics to prostate cancer.
“By uncovering yet another potential health concern posed by plastic, our findings highlight the need for stricter regulatory measures to limit the public’s exposure to these substances, which are everywhere in the environment,” said senior study author Vittorio Albergamo, assistant professor in the department of pediatrics at NYU Grossman School of Medicine, in the release.
Using visuals of both benign samples and tumor samples, as well as specialized equipment, the scientists identified plastic particles in 90% of the tumor samples and 70% of benign tissue samples. (iStock)
The study findings were presented during the American Society of Clinical Oncology’s Genitourinary Cancers Symposium in San Francisco on Feb. 26.
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“What is most striking is not that microplastics were detected, but that they were found embedded within tumor tissue itself,” Dr. David Sidransky, oncologist and medical advisor at SpotitEarly, a startup that offers an at-home breath-based test to detect early-stage cancer, told Fox News Digital.
“While complete avoidance is unrealistic, people can take practical steps to reduce exposure.”
“We already know microplastics are present in water, air, blood and even placental tissue. Their detection in prostate tumors suggests systemic distribution and long-term bioaccumulation,” added Maryland-based Sidransky, who was not involved in the study.
Study limitations
Albergamo cautioned that a larger sample is needed to confirm the findings. Additionally, Sidransky noted that the presence of microplastics alone does not prove they cause cancer.
“Tumors can act as ‘biologic sinks,’ meaning they may accumulate circulating particles simply because of altered vasculature and permeability,” he said.
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A key unanswered question, according to the doctor, is whether microplastics are biologically active in ways that “promote DNA damage, immune modulation or chronic inflammation within the prostate.”
About one in eight men in the U.S. will be diagnosed with prostate cancer at some point in their lifetime, according to the Centers for Disease Control and Prevention.
The most actionable step men can take is appropriate screening and early detection, according to doctors. (iStock)
For those concerned about microplastics, Sidransky offered some insights.
“I believe the appropriate response is curiosity, not panic, and a commitment to understand more,” he said.
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“While complete avoidance is unrealistic, people can take practical steps to reduce exposure, such as minimizing heating food in plastic containers, reducing bottled water consumption when possible, and favoring glass or stainless steel alternatives.”
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The most actionable step men can take, however, is getting appropriate screenings to help ensure early detection, according to the doctor. Screening discussions should be individualized based on age, family history and other risk factors.
Health
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