Health
Alzheimer’s and Parkinson’s risk is higher for people with body fat in two specific areas
Excess fat in certain areas of the human body could make people more prone to neurological diseases like Alzheimer’s and Parkinson’s, a new study suggests.
The study, published in the journal Neurology — the medical journal of the American Academy of Neurology — linked higher levels of body fat in the arms and belly with a greater chance of developing these conditions.
In another key finding, people who have more muscle strength were at lower risk of developing these diseases.
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“Overall, the key takeaway message from our study finding is that body composition and cardiovascular diseases may be potential targets for preventing neurodegenerative diseases,” said lead study author Shishi Xu, a clinician in the Department of Endocrinology and Metabolism at West China Hospital of Sichuan University, in a statement to Fox News Digital.
The study group that had higher levels of belly fat had a 13% greater chance of developing neurological diseases like Alzheimer’s and Parkinson’s compared to those with lower levels, the researchers found.
Excess fat in certain areas of the body could make people more prone to neurological diseases such as Alzheimer’s and Parkinson’s, a new study suggests. (iStock)
Participants with higher levels of arm fat had an 18% higher risk.
Those with high muscle strength were 26% less likely to develop these types of diseases than those with low levels of strength, according to Xu.
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Cardiovascular disease risk plays a role, too, she said.
“If you are exposed to adverse body composition patterns, such as belly fat, you will have a higher risk of developing cardiovascular diseases, which significantly increases your risk of future neurodegenerative diseases,” Xu said.
Higher levels of body fat in the arms and belly were linked to a greater chance of developing neurological conditions. (iStock)
“On contrast, actively preventing CVDs at an early stage after exposure to adverse body composition patterns may decrease your future risk of neurodegenerative diseases by 10.7% to 35.3%.”
Dr. James Galvin, director of the Comprehensive Center for Brain Health at the University of Miami Health System, was not involved in the study, but said the findings did not surprise him.
“Body composition and cardiovascular diseases may be potential targets for preventing neurodegenerative diseases.”
“This is consistent with a body of literature suggesting a bidirectional relationship between brain and body,” he told Fox News Digital.
“Loss of muscle mass and strength (sarcopenia) and increase in body fat, particularly visceral fat, are risk factors for cognitive impairment.”
Potential limitations
In observational studies like this one, it can be tough to distinguish between correlation or causation, Xu said.
“Although we have made significant efforts in this study to approach a causal relationship, we acknowledge that residual reverse causation may still bias our findings,” she told Fox News Digital.
Taking steps to achieve healthier body composition may be more effective for preventing neurological diseases than general weight control, researchers said. (iStock)
Although the study suggests that body composition and cardiovascular diseases may be potential targets for preventing neurodegenerative diseases, Xu noted that more evidence is needed to confirm that these are causal risk factors.
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Galvin noted that another major limitation of the study was the lack of diversity in the sample.
“This is unfortunate, as obesity is an important risk factor in many minoritized populations, and our own research has demonstrated that physical frailty is an important mediator of cognitive decline in African American older adults,” he said.
Recommended lifestyle changes
Based on the findings, the researchers said, taking steps to achieve healthier body composition — such as reducing belly and arm fat while promoting healthy muscle development — may be more effective for preventing neurological diseases than general weight control.
“Lifestyle modifications like engaging in resistance training, reducing sedentary behavior and adhering to a balanced diet can be effective in reducing abdominal fat as well as enhancing muscle strength, which may potentially offer greater neuroprotective benefits than weight-focused anti-obesity medications,” Xu said.
The researchers also stated that early management of cardiovascular diseases may reduce the risk of neurodegenerative diseases.
The quality or distribution of muscle and fat, rather than the absolute weight, may be more important for your health, according to researchers. (iStock)
The quality or distribution of muscle and fat, rather than the absolute weight, may be more important for your health, according to Xu.
“In recent years, due to the widespread use and even abuse of weight-loss drugs, people have become overly concerned with overall weight and often overlook the key role of different body components,” she said.
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Muscle strength is often overlooked, the researcher noted.
“Our current study findings highlight that enhancing muscle strength is important and may potentially offer neuroprotective benefits,” she said.
“Our current study findings highlight that enhancing muscle strength is important and may potentially offer neuroprotective benefits,” the researcher said. (iStock)
“Therefore, maintaining a healthy lifestyle and enhancing your muscle strength are crucial.”
Galvin agreed, recommending that people should focus on reducing body fat while maintaining skeletal muscle by adding resistance and flexibility training and changing nutrition patterns.
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Added the doctor, “As we learn more about the impact of lifestyle on brain health and risk of disease, it is increasingly evident that there are many ways to build a better brain as we age.”
Health
GLP-1 Drugs Linked to Osteoporosis and Gout: Here’s How To Stay Safe
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Health
Ozempic-style drugs could slash complication risks after heart attacks, research suggests
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A popular class of weight-loss drugs may prevent life-threatening cardiac complications by opening microscopic blood vessels that often remain blocked after a heart attack, according to a study published this week in Nature Communications.
The research, led by the University of Bristol and University College London, identified a biological brain-gut-heart signaling pathway.
This discovery appears to explain how GLP-1 drugs — which mimic glucagon-like peptide-1, a hormone that helps regulate blood sugar and appetite — protect heart tissue from a condition known as “no-reflow.”
“In nearly half of all heart attack patients, tiny blood vessels within the heart muscle remain narrowed, even after the main artery is cleared during emergency medical treatment,” Dr. Svetlana Mastitskaya, the study’s lead author and a senior lecturer at Bristol Medical School, said in a press release.
“This results in a complication known as ‘no-reflow,’ where blood is unable to reach certain parts of the heart tissue.”
In nearly half of all heart attack patients, tiny capillaries (blood vessels) remain narrowed even after the main blocked artery is cleared. (iStock)
This lack of blood flow increases the risk of heart failure and death within a year. GLP-1 medications could prevent this, according to the researchers.
How it works
When the GLP-1 hormone is released in the gut or administered as a drug, it sends a signal to the brain, which then sends a signal to the heart that switches on special potassium channels in tiny cells called pericytes.
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When these channels open, the pericytes relax, which allows the small blood vessels (capillaries) to widen and improve blood flow to the heart muscle, the researchers noted.
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The new study used animal models and cellular imaging to track how GLP-1 interacts with heart tissue. When the researchers removed the potassium channels, the drugs no longer protected the heart — confirming they play a key role.
The findings suggest that existing GLP-1 medications, already used for type 2 diabetes and obesity, could be repurposed as emergency treatments. (iStock)
The findings suggest that existing GLP-1 medications, already used for type 2 diabetes and obesity, could be repurposed as emergency treatments during or immediately after a heart attack to reduce tissue damage.
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The researchers noted several limitations, including that the study relied on animal models.
Clinical trials are necessary to determine whether the brain-gut-heart pathway operates with the same timing and efficacy in humans.
While the study highlights the drug’s immediate benefits during a heart attack, it des not establish whether long-term use of these drugs provides a pre-existing level of protection. (iStock)
Additionally, while the study highlights the drug’s immediate benefits during a heart attack, it does not establish whether long-term use of the medication provides a pre-existing level of protection.
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The research was primarily funded by the British Heart Foundation.
Health
Do collagen supplements really improve skin? Major review reveals the truth
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Collagen supplements have exploded in popularity, touted as everything from an anti-aging miracle to a muscle recovery booster.
But a sweeping new review conducted by U.K. researchers suggests that while collagen may help improve skin elasticity and ease arthritis pain, it does little for athletic performance or wrinkle reduction.
Researchers from Anglia Ruskin University analyzed 16 systematic reviews and 113 randomized controlled trials involving nearly 8,000 participants worldwide, which they say is the most extensive evaluation of collagen’s health effects to date.
The review found consistent evidence that collagen supplementation improves skin elasticity and hydration over time and provides significant relief from osteoarthritis-related joint pain and stiffness, according to findings published in Aesthetic Surgery Journal Open Forum.
A large U.K. review found that collagen supplements may improve skin elasticity and hydration over time. (iStock)
The researchers, however, did not find meaningful improvements in post-exercise muscle recovery, soreness or tendon mechanical properties (strength, springiness and stretch resistance).
“Collagen is not a cure-all, but it does have credible benefits when used consistently over time, particularly for skin and osteoarthritis,” co-author Lee Smith, professor of public health at Anglia Ruskin University, said in a statement.
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“Our findings show clear benefits in key areas of healthy aging, while also dispelling some of the myths surrounding its use,” Smith added.
Collagen, the most abundant protein in the body, supports skin, bones, tendons, cartilage and connective tissue, according to experts. Natural collagen production begins to drop in early adulthood and declines more sharply with age.
The study found that collagen supplements may help reduce joint pain and stiffness in people with osteoarthritis. (iStock)
The review found that long-term collagen supplementation was linked to improved skin firmness and hydration, but did not help skin roughness — a proxy for visible wrinkles.
Benefits appear to accumulate gradually, suggesting that collagen should not be viewed as an “anti-wrinkle ‘quick fix,’ but as a foundational dermal support for individuals seeking holistic skin maintenance,” the researchers said.
“If we define anti-aging as a product or technique designed to prevent the appearance of getting older, then I believe our findings do support this claim for some parameters,” Smith told the BBC. “For example, an improvement in skin tone and moisture is associated with a more youthful-looking appearance.”
Collagen supplementation was linked to reduced pain and stiffness in people with osteoarthritis, with stronger benefits seen over longer periods of use, and showed modest improvements in muscle mass and tendon structure that may support healthy aging.
Collagen did not significantly improve skin roughness, a marker of visible wrinkles. (iStock)
However, it did not show meaningful results when used as a fast-acting sports performance supplement, and evidence for benefits related to cholesterol, blood sugar, blood pressure and oral health was mixed or inconclusive.
Dr. Daniel Ghiyam, a California-based physician and longevity specialist, said the findings align with what he sees in clinical practice.
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“Collagen is a targeted support tool, not a foundation of health or performance,” Ghiyam, who was not involved in the study, told Fox News Digital. “When marketed that way, it makes sense. When marketed as a cure-all, it doesn’t hold up to the data.”
The authors noted that while many previous collagen studies have received financial support from the supplement industry, the current review did not receive industry funding.
Experts say collagen supplements may offer modest benefits for skin hydration and joint comfort, but they are not a cure-all. (iStock)
The team called for more high-quality clinical trials examining long-term outcomes, optimal dosages and differences between collagen sources, such as marine, bovine and plant-based alternatives.
Among its limitations, the review could not determine whether certain forms of collagen work better than others or what the optimal regimen should be.
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While the review included randomized controlled trials, the quality of the studies varied, with newer research generally showing stronger results.
Experts say more data and studies are needed to build on the findings. They also noted that diet plays a crucial role in skin health.
Collagen supplements, often sold as powders or pills, may improve skin elasticity and ease joint pain, experts say. (iStock)
Dr. Erum Ilyas, a Pennsylvania-based dermatologist and chair of dermatology at Drexel University College of Medicine, noted that the review analyzed previously published meta-analyses rather than generating new primary data.
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“At this time, I have not seen sufficiently strong independent evidence to routinely recommend collagen supplements to my patients,” Ilyas, who was not involved in the review, told Fox News Digital.
“Although some studies show modest improvements in markers such as hydration and elasticity, there remains limited independent, biopsy-confirmed evidence demonstrating sustained increases in dermal collagen content,” she added.
Fox News Digital has reached out to the researchers for comment.
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