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Todays Videos:
1. Stop the Shot – Caught on Tape.. start 27:30 end 32:304. Elizabeth QuestionDrinking Matcha Tea Can Reduce Anxiety
Kumamoto University (Japan), October 26, 2021
According to The Book of Tea, written in 1906 by Japanese scholar Okakura Kakuzō,“Tea began as a medicine and grew into a beverage.” With that simple yet profound statement, Okakura succinctly explained why green tea has long been celebrated as both a soothing refreshment and health-boosting tonic.
Researchers at Kumamoto University in the Kyushu region of Japan studied green tea’s beneficial properties, specifically its ability to calm the mind. Published in the Journal of Functional Foods in 2019, the study examined the stress-reducing function of matcha green tea in animal experiments and clinical trials.[ii]
Matcha tea is a potent form of powdered green tea, containing more medicinal phytochemicals than regular green tea and also more caffeine. The study honed in on the effects of L-theanine, a primary amino acid in green tea that has been shown to exhibit stress-reducing effects in mice[iii] and humans with high-trait anxiety.[iv]
The amino acid L-arginine, also present in traditional green tea, has previously been shown to enhance stress-reducing effects of certain amino acids.[v] Matcha tea, also called “fine powder tea,” has higher concentrations of theanine and arginine than traditional green tea preparations.
However, the higher caffeine level creates an effect that is antagonistic to theanine, meaning it reduces theanine’s calming effects. Previous studies have suggested that differences in the quantities and ratios of these three green tea components (theanine, arginine and caffeine) affect the efficiency of its stress-reducing action.
Therefore, the stress-reducing effect of a standard matcha preparation was first evaluated in an animal (mouse) experiment before moving on to human trials utilizing a specialized matcha preparation with reduced levels of caffeine (“test matcha”).
Animal Studies Show Stress-Reducing Effect of Matcha Tea
Researchers expected matcha tea to have a stress-reducing effect due to its high theanine content and sought to test their hypothesis with mice that were placed under controlled stress.
The stress-reducing effect of tea components was measured by comparing four groups of mice that were fed as follows: group 1 received a standard powder diet; group 2 was fed a diet containing only theanine; group 3 was fed a diet containing theanine, caffeine and EGCG, the most abundant polyphenol in tea; and group 4 mice were fed a diet containing theanine, caffeine, EGCG and arginine.
Using this test, researchers found that mouse anxiety (adrenal hypertrophy) was significantly reduced after consuming at least 33 milligrams per kilogram of body weight of matcha powder or matcha extract. Relationships between elements were also analyzed. Researchers confirmed that theanine and arginine have a significant stress-reducing effect when used in combination.
Theanine is needed at concentrations of at least 0.32 milligrams per kilogram of body weight to be effective; arginine supplementation alone was not effective. There was no relationship between caffeine and adrenal hypertrophy. Researchers then moved on to test a variety of specialized matcha preparations using human subjects.
Increase Matcha Potency to Offset Human Stress
In the human trial, researchers sought to enhance the stress-reducing effects of matcha tea by testing a specialized blend of matcha with reduced caffeine content, made from tea leaves that had been prepared by irrigating them with hot water at 95 degrees C for three minutes. This experimental preparation, called “test matcha,” thereby enhanced quantities of theanine and arginine while suppressing caffeine ratio.
Thirty-nine healthy subjects (23 men and 16 women) were selected for this human trial and randomly allocated into experimental and control groups. Participants were university pharmacy students who were engaged in regular university life and a more intense, therefore anxiety-producing, pharmacy practice environment. All were free of acute or chronic diseases, were not taking major medications and were non-smoking.
Participants were instructed to drink 3 grams of either test or placebo matcha preparation per day, suspended in 500 milliliters of room-temperature water. They were asked to avoid other caffeine and theanine-rich beverages such as other teas, coffee and soda, for the duration of the experiment. They were also instructed to avoid caffeine-rich foods such as chocolate and to avoid alcohol.
The intake of test- or placebo-matcha was conducted for a period of 15 days, which began with seven days of normal collegiate life, followed by an intensified instructional experience of pharmacy practice that took place over eight days.
Participants were given the State-Trait Anxiety Inventory (STAI) test before pharmacy practice began and at the end of this practice period. A questionnaire was also given in which feedback was solicited on their emotions, subjective stress and physical condition. Sleeping hours were also recorded.
Before pharmacy practice, the STAI value of matcha test group participants was significantly lower than placebo group. On the eighth day of pharmacy practice, the mean values and differences between these groups was low, indicating that drinking matcha tea had a significant impact on anxiety levels before the stress period was induced.
After review of all data, including the matcha variations, researchers concluded that both anxiety and physiological stress were decreased when test-matcha was consumed.
Researchers noted that the quantities of theanine and arginine must be high, whereas the EGCG and caffeine levels must be low to receive optimum anti-anxiety benefits of matcha tea. Therefore, this research suggests that the quality of matcha tea preparation is highly important when an individual is consuming matcha for its calming properties.Effects of age, sex and mindfulness on quality of life in men, women with autism
Arizona State University, October 26, 2021
The practice of mindfulness was often touted throughout the pandemic as a useful tool for dealing with an unforeseen life stressor. As College of Health Solutions Assistant Professor Blair Braden recently discovered, mindfulness is also a useful tool for dealing with the particular stressors associated with autism spectrum disorder.
“Initially, most of the research in my lab was looking at how aging affects individuals with autism on a cognitive level,” said Braden, who directs the Autism and Brain Aging Laboratory at Arizona State University. “But one of the things we didn’t expect was that we saw very consistently a lot of struggles with depression and anxiety, as well as physical health, that contribute to quality of life.”
In a paper published this month in the journal Quality of Life Research, Braden and colleagues detail two separate studies in which they set out to better understand the factors that affect quality of life in adults with autism, whom studies have shown consistently report worse functional health and well-being compared with their neurotypical peers.
The researchers found that both age and sex play a role, and that both mindfulness and relaxation education can improve quality of life in adults with autism, but mindfulness provided specific benefits in relation to how autistic individuals view their disability-associated limitations that relaxation education did not.
The first study employed a survey to evaluate the effects of sex and age. Sixty-seven adults with autism spectrum disorder and 66 neurotypical adults answered questions about their physical and mental health. Both men and women with autism reported lower mental health quality of life compared with their neurotypical counterparts, but only women with autism reported lower physical quality of life compared with neurotypical adults.
“This is kind of consistent with the larger picture of how autism manifests in girls and women,” Braden said. “Women seem to carry a greater burden across the board.”
Interestingly, researchers also found that among adults with autism, older women reported better mental health than men, whom age didn’t appear to have an effect on.
The second study sought to compare the effects of a mindfulness-based stress reduction (MBSR) intervention to those of a relaxation education intervention on quality of life in adults with autism. Those who received the MBSR intervention were not only taught mindfulness techniques by a trained practitioner, they were also given time to practice the techniques during the class. Those who received the relaxation education intervention were provided with information on relaxation techniques from the National Institutes of Health, but were not given time to practice the techniques during the class.
Researchers found that the MBSR intervention improved disability-related quality of life (which includes both physical and mental health aspects of disability) in adults with autism over and above the relaxation education intervention, but both interventions improved mental health-related quality of life. In addition, both interventions were more effective for overall health-related quality of life improvements in women with autism compared with men with autism.
“There is some research about the psychosocial mechanisms of how mindfulness works in general,” Braden said about the difference in results between the sexes. “When it comes to personality characteristics like openness and empathy, which are thought to improve the effects of mindfulness, women tend to score higher in general than men. But people with autism are known to struggle with empathy, so we’re not sure why we’re seeing that here.”
Overall, the researchers were able to conclude a few things:
- Men and women with autism spectrum disorder do not experience equivalent health-related quality of life reductions, and difficulties associated with the disorder may change over the lifespan.
- Psychosocial interventions broadly may only be effective for improving health-related quality of life in women with autism spectrum disorder, rather than both sexes.
- MBSR may have specific efficacy for improving disability-related quality of life in men and women with autism spectrum disorder.
Ideally, the researchers say, these findings can be expanded and incorporated into precision medicine strategies for improving quality of life in adults with autism spectrum disorder, across the life span.
“Our findings show that we need to be thinking about how autism affects adults based on their age and sex,” Braden said. “We likely also need to take a personalized medicine approach to how we treat some of these difficulties in future interventions.”
Study shows medicinal cannabis products can help with depression and improve quality of life
- Medical University of South Carolina, Charleston and Johns Hopkins University, October 26, 2021
A team of researchers affiliated with multiple institutions in the U.S. has found evidence that medicinal cannabis products relieve depression and improve the quality of life. In their paper published in the journal Frontiers in Psychiatry, the group describes their study involving online surveys about the benefits of cannabis products.
Prior research findings regarding the use of cannabis-based products to treat depression and anxiety have been mixed. Some patients have shown improvements while others have not. Prior research has also found that other drugs developed to treat depression and anxiety also have mixed results—some have seen improvements while others have not, and some patients have found that they cannot tolerate the side effects of the drugs. Also, some people have begun using medicinally approved cannabis products to help with their depression, anxiety, chronic pain or sleep disorder, regardless of the research track record—either independently, or with assistance from a doctor. In this new effort, the researchers conducted a study to gauge the opinions of people who use such products, rather than focusing on reports from the medical communityregarding how well they thought they worked.
The study was carried out over four years. At the onset, the researchers received responses from 368 people who reported using cannabis products to reduce their depression and/or anxiety, or to help them sleep. As a control group, they also received responses from 170 people who were not using cannabis products but who were considering doing so due to their problems with depression or anxiety.
The researchers found that those people taking cannabis products (mostly those containing CBD rather than THC) reported lower levels of depression than the control group, although they saw no difference in anxiety. They also found those taking cannabis products reported a higher quality of life and better sleep than the control group. The researchers also found reduced levels of depression later on in those who continued to take cannabis products and also in those who began using them during the study. And interestingly, they also found that those who began taking the products during the study also reported improvements in anxiety and quality of life.
Breastfeeding linked to lower risk of type 1 diabetes
Karolinska Institute (Sweden), October 12, 2021
Research on the role of diet in the development of type 1 diabetes is generally of low evidence, but there are some high-quality studies indicating that longer breastfeeding and later introduction to gluten may reduce the risk of disease. That is according to a systematic review and meta-analysis of available research on foods that may be linked to the risk of developing the type 1 diabetes in childhood. The study by researchers at Karolinska Institutet is published in the journal EBioMedicine.
Increasing numbers of children are developing the autoimmune disease type 1 diabetes. In Sweden, 40 children per 100,000 are diagnosed every year, which is the second highest incidence in the world. This negative trend seems to depend on a combination of genetic and environmental factors, but the question of possible prevention remains unanswered.
Research on the role of diet in the development of type 1 diabetes has not produced any unequivocal results so far. Now, researchers at Karolinska Institutet in Sweden have reviewed and analyzed the available research on the links between the diets of mother and child, during infancy and childhood, and the risk of developing type 1 diabetes.
“Our meta-analysis indicates that breastfeeding and later introduction to gluten may have a protective effect against type 1 diabetes,” says the study’s first author Anna-Maria Lampousi, doctoral student at the Institute of Environmental Medicine, Karolinska Institutet. “At the same time, it is important to note that both genetic and various environmental factors likely affect risk of type 1 diabetes, and that on an individual level, the risk of being affected is still low regardless of whether you receive infant formula or gluten during the first months of life.”
Analyzed 26 dietary factors
The researchers screened 5,935 articles published in medical journals up to October 2020. Of the total number of studies, 96 could be included in the meta-analysis as they contained results on diet and risk of type 1 diabetes in children and were of sufficient quality.
All in all, 26 dietary factors were evaluated, such as breastfeeding, age of introduction to different foods, in utero nutrient exposure and childhood diet.
The studies with the strongest evidence indicated that longer breastfeeding and later introduction to gluten were associated with a lower risk of type 1 diabetes. For babies nursed for at least six to 12 months, the risk of developing type 1 diabetes was 61 percent lower than in other babies. Babies who had been introduced to gluten at three to six months of age were 64 percent less likely to develop type 1 diabetes than those who were introduced to gluten earlier.
The researchers did not study which mechanisms may explain the associations. However, previous research has shown positive effects of breastfeeding in general, for example on the development of the child’s immune system and gut biome, while experimental studies have shown that gluten may harm insulin-producing beta cells.
The review also found evidence of moderate quality for an association with lower risk of type 1 diabetes in children who were breast fed exclusively for at least two months and had a later introduction to cow’s milk (after two to three months of age) and fruit (four to six months of age instead of earlier).
There was also an association with increased risk of type 1 diabetes and consumption of at least two to three portions of cow-milk based products per day during childhood, but this finding had low certainty of evidence and should be interpreted with caution, according to the researchers. The studies also pointed to a protective effect of vitamin D supplementation during infancy. The diet of the mother during pregnancy was not associated with type 1 diabetes in her baby.
“With this meta-analysis, we have tried to decipher which dietary factors with strong or moderate evidence may be linked to risk of type 1 diabetes,” says Sofia Carlsson, senior lecturer at the Institute of Environmental Medicine, Karolinska Institutet, and the study’s senior author. “Our analysis suggests that there are reasons to look closer at the protective effects of breastfeeding on type 1 diabetes as well as the importance of later introduction to gluten, cow’s milk and fruit during infancy. At the same time, the evidence for most dietary factors was generally low and we need more high-quality research to be able to draw any definitive conclusions.”
How diet affects tumors
A new study finds cutting off cells’ supplies of lipids can slow the growth of tumors
Massachusetts Institute of Technology, October 22, 201
In recent years, there has been some evidence that dietary interventions can help to slow the growth of tumors. A new study from MIT, which analyzed two different diets in mice, reveals how those diets affect cancer cells, and offers an explanation for why restricting calories may slow tumor growth.
The study examined the effects of a calorically restricted diet and a ketogenic diet in mice with pancreatic tumors. While both of these diets reduce the amount of sugar available to tumors, the researchers found that only the calorically restricted diet reduced the availability of fatty acids, and this was linked to a slowdown in tumor growth.
The findings do not suggest that cancer patients should try to follow either of these diets, the researchers say. Instead, they believe the findings warrant further study to determine how dietary interventions might be combined with existing or emerging drugs to help patients with cancer.
“There’s a lot of evidence that diet can affect how fast your cancer progresses, but this is not a cure,” says Matthew Vander Heiden, director of MIT’s Koch Institute for Integrative Cancer Research and the senior author of the study. “While the findings are provocative, further study is needed, and individual patients should talk to their doctor about the right dietary interventions for their cancer.”
MIT postdoc Evan Lien is the lead author of the paper, which appears today in Nature.
Metabolic mechanism
Vander Heiden, who is also a medical oncologist at Dana-Farber Cancer Institute, says his patients often ask him about the potential benefits of various diets, but there is not enough scientific evidence available to offer any definitive advice. Many of the dietary questions that patients have focus on either a calorie-restricted diet, which reduces calorie consumption by 25 to 50 percent, or a ketogenic diet, which is low in carbohydrates and high in fat and protein.
Previous studies have suggested that a calorically restricted diet might slow tumor growth in some contexts, and such a diet has been shown to extend lifespan in mice and many other animal species. A smaller number of studies exploring the effects of a ketogenic diet on cancer have produced inconclusive results.
“A lot of the advice or cultural fads that are out there aren’t necessarily always based on very good science,” Lien says. “It seemed like there was an opportunity, especially with our understanding of cancer metabolism having evolved so much over the past 10 years or so, that we could take some of the biochemical principles that we’ve learned and apply those concepts to understanding this complex question.”
Cancer cells consume a great deal of glucose, so some scientists had hypothesized that either the ketogenic diet or calorie restriction might slow tumor growth by reducing the amount of glucose available. However, the MIT team’s initial experiments in mice with pancreatic tumors showed that calorie restriction has a much greater effect on tumor growth than the ketogenic diet, so the researchers suspected that glucose levels were not playing a major role in the slowdown.
To dig deeper into the mechanism, the researchers analyzed tumor growth and nutrient concentration in mice with pancreatic tumors, which were fed either a normal, ketogenic, or calorie-restricted diet. In both the ketogenic and calorie-restricted mice, glucose levels went down. In the calorie-restricted mice, lipid levels also went down, but in mice on the ketogenic diet, they went up.
Lipid shortages impair tumor growth because cancer cells need lipids to construct their cell membranes. Normally, when lipids aren’t available in a tissue, cells can make their own. As part of this process, they need to maintain the right balance of saturated and unsaturated fatty acids, which requires an enzyme called stearoyl-CoA desaturase (SCD). This enzyme is responsible for converting saturated fatty acids into unsaturated fatty acids.
Both calorie-restricted and ketogenic diets reduce SCD activity, but mice on the ketogenic diet had lipids available to them from their diet, so they didn’t need to use SCD. Mice on the calorie-restricted diet, however, couldn’t get fatty acids from their diet or produce their own. In these mice, tumor growth slowed significantly, compared to mice on the ketogenic diet.
“Not only does caloric restriction starve tumors of lipids, it also impairs the process that allows them to adapt to it. That combination is really contributing to the inhibition of tumor growth,” Lien says.
Dietary effects
In addition to their mouse research, the researchers also looked at some human data. Working with Brian Wolpin, an oncologist at Dana-Farber Cancer Institute and an author of the paper, the team obtained data from a large cohort study that allowed them to analyze the relationship between dietary patterns and survival times in pancreatic cancer patients. From that study, the researchers found that the type of fat consumed appears to influence how patients on a low-sugar diet fare after a pancreatic cancer diagnosis, although the data are not complete enough to draw any conclusions about the effect of diet, the researchers say.
Although this study showed that calorie restriction has beneficial effects in mice, the researchers say they do not recommend that cancer patients follow a calorie-restricted diet, which is difficult to maintain and can have harmful side effects. However, they believe that cancer cells’ dependence on the availability of unsaturated fatty acids could be exploited to develop drugs that might help slow tumor growth.
One possible therapeutic strategy could be inhibition of the SCD enzyme, which would cut off tumor cells’ ability to produce unsaturated fatty acids.
“The purpose of these studies isn’t necessarily to recommend a diet, but it’s to really understand the underlying biology,” Lien says. “They provide some sense of the mechanisms of how these diets work, and that can lead to rational ideas on how we might mimic those situations for cancer therapy.”
The researchers now plan to study how diets with a variety of fat sources — including plant or animal-based fats with defined differences in saturated, monounsaturated, and polyunsaturated fatty acid content — alter tumor fatty acid metabolism and the ratio of unsaturated to saturated fatty acids.
Spearmint can significantly improve memory, concentration, and brain function
St Louis University School of Medicine, October 25, 2021
Around 64 percent of Americans start their day with a cup of coffee (or several). And, many health article mention that this popular beverage can actually improve memory? But, does it really? And, is there a healthy alternative?
The caffeine in coffee causes a brain release of noradrenaline along with an energy boost and cognitive stimulation. However, this is inevitably followed shortly by a “caffeine crash” as the noradrenaline is depleted.
Research is showing there’s a more effective alternative to caffeine and it’s called, spearmint. Long used medicinally for its stimulating and uplifting effects, it can provide a healthier and more reliable energy boost. Even better, spearmint has also been found to improve memory, sharpen concentration and support overall brain health.
Research shows spearmint dramatically improves brain function in older individuals
Spearmint also contains antioxidants, vitamins and other vital nutrients. It has a similar aroma to peppermint, but a sweeter taste. It contains less menthol than peppermint; however, it is rich in the nutrients limonene, dihydrocarvone, and cineol.
The benefits of spearmint are particularly beneficial for cognitive functioning. It offers an enticing combination of relaxation as well as an almost immediate boosting of cognitive function.
Two recent studies confirm and quantify the powers of spearmint’s ability to support brain health and boost memory. The study results also showed improvements to concentration, attention span, planning capacity and overall brain functioning.
A 2015 Kemin Human Nutrition and Health study assessed 11 healthy adults with an average age of around 59 years old. All subjects reported that they had some memory impairment at the start of the study. Each of the participants took 900 mg of spearmint extract once per day in the morning for one month.
How spearmint can improve memory, mental focus and overall brain health
The subjects took memory and cognition tests that assessed their ability to concentrate, pay attention and plan. A single dose of spearmint extract showed significant improvements within the four hours following the dose. At the four hour mark, participants showed a stunning improvement in their memory performance ranging from 46 percent to 121 percent. Planning abilities improved by 39 percent four hours after taking the spearmint extract.
Long-term tests after the 30-day study period showed significant overall improvements in all areas. Reasoning abilities improved by 35 percent, and concentration and attention were 125 percent higher. Planning capacity was better by 48 percent.
Spearmint shown to improve sleep patterns, digestion and overall energy levels
Another 2015 spearmint study published in the journal Neurology looked at 90 subjects with an average age of 59. All participants showed age-associated memory impairment at the study outset. Subjects received either 600 mg or 900 mg of spearmint extract daily. They all showed dramatic improvements in spacial working memory as well as their sleep patterns.
Other health benefits of spearmint include improved digestion and relief from sore throat, toothache, cramps, arthritis symptoms, headache, fatigue and the common cold.
If you’re looking for a healthier alternative to coffee without the caffeine crash, consider switching to spearmint tea, extracts or herbal supplements. In addition to the energy boost you’ll receive, you’ll also be helping to improve memory, attention, concentration and brain health naturally
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