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Nutrition

New Study Shows High Fat Diets Worse Than Previously Thought

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A comprehensive study conducted at UC Riverside shows that high-fat diets are much worse than previously thought. We already knew that high-fat diets were associated with obesity, colon cancer, and irritable bowel. However, the new study adds a number of other ailments to that list, including immune system dysfunction, improper brain functioning, and even COVID-19 risk. 

Unlike previous studies, this research focused on an in-depth examination of the effects of high-fat diets, utilizing mice as subjects and feeding them three different diets over a span of 24 weeks, where at least 40% of the calories came from fat.

The study delved into not only the changes in the animals’ microbiomes but also genetic alterations in all four parts of the intestines. Surprisingly, all three high-fat diet groups, irrespective of the fat source, exhibited concerning changes in gene expression. These changes encompassed genes related to fat metabolism, the composition of gut bacteria, susceptibility to infectious diseases, and an increase in stem cell activity in the colon.

Notably, all three high-fat diets, which included saturated fat from coconut oil, monounsaturated modified soybean oil, and unmodified soybean oil high in polyunsaturated fat, demonstrated an increase in the expression of ACE2 and other host proteins. These proteins are utilized by COVID-19 spike proteins to enter the body, suggesting a potential link between high-fat diets and an increased risk of COVID-19.

Lead researcher Frances Sladek highlighted the misconception that plant-based diets are universally healthier, emphasizing that a high-fat diet, even if plant-based, can have adverse effects on various aspects of health. The study revealed that changes in the microbiome were more pronounced in mice fed the soybean oil diet, underlining the negative health implications of high soybean oil consumption.

While the study was conducted in mice, the findings are concerning, given that soybean oil is the most commonly consumed oil in the United States and is increasingly prevalent in other countries like Brazil, China, and India. 

Researchers hope that the study prompts individuals to scrutinize their long-term high-fat dietary habits, considering the potential impact on the immune system and brain function. They emphasize that exercise alone may not be sufficient to counteract these adverse effects, urging a closer examination of dietary choices for sustained health and well-being.

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Health

A New Weapon in the Fight Against Dementia: Olive Oil

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Good news for Italian food fans: A new study suggests that olive oil can reduce your risk of dementia-related mortality. The study, published in JAMA Network Open, utilized data from two large U.S. prospective cohorts: the Nurses’ Health Study and the Health Professionals Follow-Up Study. Researchers found that individuals consuming more than 7 grams of olive oil daily had significantly lower dementia-related mortality rates compared to those with lower intake.

The study included 92,383 participants, with a participant pool comprising 65% women and an average age of 56 years. The follow-up period spanned 28 years, during which there were 37,649 total deaths, including 4,751 dementia-related deaths. At the beginning of the study, the average olive oil consumption was 1.3 grams per day.

Participants consuming more than 7 grams of olive oil daily, approximately half a tablespoon, demonstrated a range of positive lifestyle attributes. These included higher caloric intake without a higher BMI, better diet quality, higher alcohol consumption, increased physical activity, and a lower likelihood of smoking. Overall, the study found that consuming at least 7 grams of olive oil daily was associated with a 28% lower risk of dementia-related death.

Olive Oil’s Role in Reducing Dementia Risk

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The researchers explored the substitution of olive oil for other fats in the diet. Replacing 5 grams per day of margarine or mayonnaise with olive oil was linked to an 8% to 14% lower risk of dementia-related deaths. However, substituting other vegetable oils or butter did not significantly reduce the risk. The study concluded that higher olive oil intake was associated with a lower risk of dementia-related mortality, irrespective of diet quality.

Broader Implications for Health

Beyond its implications for dementia, the study’s findings support current dietary recommendations to choose olive oil and other vegetable oils for cognitive health. Olive oil’s rich content of vitamin E and polyphenols, which are antioxidants that protect cells and blood vessels in the brain, as well as its anti-inflammatory properties, contribute to its health benefits. Inflammation, often an underlying cause of dementia and cognitive decline, can be mitigated by these properties.

For those looking to increase their olive oil intake, it can be easily incorporated into daily meals. Substituting other cooking oils with olive oil, making salad dressings, or using it as a marinade for proteins are practical ways to boost consumption. Both butter and olive oil can have unique health benefits, but it’s generally recommended to opt for unsaturated fats like olive oil most of the time and use butter occasionally.

Other Health Benefits of Olive Oil

Olive oil offers a range of health benefits beyond reducing dementia risk. Previous studies using similar cohort data have shown that higher olive oil intake is associated with a lower risk of cardiovascular disease, cancer, neurodegenerative diseases, and respiratory disease mortality. Additionally, a 2022 meta-analysis linked higher olive oil consumption to a lower risk of diabetes, cardiovascular disease, and all-cause mortality.

While olive oil supplements are available, experts suggest that consuming olive oil in food form is more beneficial. Supplements may not provide the same health benefits if added to an unhealthy diet. Incorporating olive oil into a balanced diet is preferable for achieving the maximum benefits.

The study reinforces the health benefits of olive oil, particularly in reducing the risk of dementia-related mortality. By making olive oil a regular part of a healthy diet, individuals can potentially enhance their cognitive health and overall well-being. As research continues to uncover the wide-ranging benefits of olive oil, it remains a valuable addition to daily nutrition for people of all ages.

Do you consume enough olive oil? Will you be upping your intake with food or supplements? Leave your thoughts in the comments below.

 

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Nutrition

Boost Your Immune System with a Balanced Diet: Strengthening Your Body’s Defenses

Our immune system plays a crucial role in keeping us healthy and protecting us from various illnesses and infections. It is our body’s first line of defense against harmful bacteria, viruses, and other pathogens. However, just like any other system in our body, our immune system needs proper care and nourishment to function efficiently. One way to boost your immune system and strengthen your body’s defenses is by following a balanced diet.

A balanced diet is essential for overall health and well-being, but it is especially important for supporting a healthy immune system. Eating a variety of nutrient-rich foods can help provide your body with the vitamins, minerals, and antioxidants it needs to fight off infections and maintain optimal function.

Here are some key nutrients and foods that can help boost your immune system:

Vitamin C: This powerful antioxidant is known for its immune-boosting properties. Foods rich in vitamin C include citrus fruits, bell peppers, strawberries, and kiwi.

Vitamin D: Adequate levels of vitamin D are essential for a strong immune system. You can get vitamin D from sunlight, fatty fish, and fortified foods like milk and cereal.

Zinc: Zinc plays a key role in immune function and wound healing. Good sources of zinc include lean meats, seafood, nuts, and seeds.

Probiotics: These beneficial bacteria help support a healthy gut microbiome, which is crucial for a strong immune system. Fermented foods like yogurt, kefir, and sauerkraut are good sources of probiotics.

Antioxidants: Antioxidants help protect your cells from damage and reduce inflammation, which can weaken your immune system. Foods rich in antioxidants include berries, dark leafy greens, and nuts.

In addition to including these immune-boosting nutrients in your diet, it is also important to maintain a healthy lifestyle. Getting regular exercise, managing stress, getting enough sleep, and staying hydrated are all important factors in supporting a strong immune system.

It is important to note that no single food or nutrient can magically boost your immune system overnight. A balanced diet that includes a variety of nutrient-rich foods is the best way to support your immune system and overall health.

In conclusion, a balanced diet rich in vitamins, minerals, antioxidants, and probiotics is crucial for boosting your immune system and strengthening your body’s defenses. By making healthy food choices and supporting a healthy lifestyle, you can help protect yourself against illness and stay healthy year-round.

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Nutrition

Lactate Identified as Major Fuel Source for Your Body

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As a high school track and field athlete, Robert Leija was concerned about how to improve his performance and prevent muscle soreness. He believed, like many athletes, that lactic acid buildup caused fatigue and soreness after intense workouts. However, as he advanced in his studies, he discovered that this common belief was a misconception. This article will explain what he learned about lactate and how it actually plays a crucial role in our body’s metabolism, especially during exercise.

For many years, athletes and even some medical professionals believed that lactate (often mistakenly called lactic acid) was a harmful byproduct of exercise. It was thought to signal that muscles were running out of oxygen, leading to fatigue and soreness. This belief was so widespread that it shaped training and recovery strategies for athletes around the world.

The New Understanding: Lactate Is Your Friend

While studying kinesiology at Fresno State, Robert Leija encountered a textbook by George Brooks that challenged these old ideas. Brooks, a professor at the University of California, Berkeley, has spent decades researching lactate and its role in the body. His work shows that lactate is not a waste product but a vital part of our metabolism.

In a recent study published in Nature Metabolism, Leija, Brooks, and their colleagues demonstrated that lactate is produced normally after eating carbohydrates. Instead of being a sign of oxygen deprivation, lactate is an essential energy carrier. This discovery has significant implications for understanding how our bodies fuel muscles during exercise and daily activities.

The Study: Lactate’s Role in Metabolism

The study involved 15 healthy, physically active young adults. They were asked to fast overnight and then drink a glucose solution. The researchers monitored their blood lactate and glucose levels over two hours. They found that lactate levels rose in the blood shortly after glucose ingestion, even before glucose itself appeared in the bloodstream.

This rapid conversion of glucose to lactate helps the body manage a sudden influx of carbohydrates. Lactate, along with insulin, helps buffer the appearance of glucose in the blood, preventing large spikes that can be harmful. Essentially, lactate acts as a carbohydrate buffer, helping maintain stable blood sugar levels.

During intense exercise, muscles produce lactate as they break down glucose for energy. This lactate enters the bloodstream and is used by other tissues, such as the heart and brain, as a fuel source. Brooks’ research shows that lactate is actually the preferred fuel for these tissues during intense activity.

This means that the increase in blood lactate levels during exercise is not a sign of muscle distress but an indication that lactate is being used efficiently as an energy source. It helps sustain muscle activity and overall performance.

Implications for Athletes and Seniors

Understanding lactate’s role can help athletes optimize their training and recovery. Instead of trying to eliminate lactate, they can focus on ways to improve its production and clearance, enhancing performance and reducing fatigue.

For seniors, this research is equally important. As we age, our metabolism changes and managing energy efficiently becomes crucial. Recognizing lactate’s role can lead to better dietary and exercise recommendations, helping seniors maintain their health and vitality.

Brooks coined the term “lactate shuttle” to describe the process by which lactate is transported throughout the body to be used as fuel. During exercise, muscles produce lactate, which is then transported to other tissues that need it. This shuttle system ensures that energy is efficiently distributed, supporting sustained physical activity.

The research by Leija, Brooks, and their colleagues revolutionizes our understanding of lactate. It shows that lactate is not a harmful byproduct but a crucial part of our metabolism. This new perspective can help athletes and seniors alike optimize their health and performance.

Understanding the true role of lactate in the body can change how we approach exercise, diet, and overall health. By embracing this new knowledge, we can develop better strategies to stay active, healthy, and energetic at any age.

Will you be adding more lactate to your diet because of this study? Why or why not? Leave your thoughts in the comments below.

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