• Chocolate on the Brain
    by BERKELEY WELLNESS  |  

    The news keeps getting sweeter about dark chocolate and other cocoa products. Since we last reviewed the research, several studies have further highlighted its potential for bettering cardiovascular health—by improving arterial function, for instance, which can help lower blood pressure. The latest research finds that cocoa can also aid the brain.

    Chocolate’s health benefits are largely attributed to compounds called flavonoids—related to those in tea, red wine, grape juice and many other plant foods. The new study, done by Italian researchers and published in Hypertension, involved 90 people over 65 with mild cognitive impairment (MCI).

    This condition causes memory problems more serious than those seen with normal aging, but less severe than those of dementia. It’s estimated that 20 percent of people over 70 have MCI and that 5 percent of those with MCI progress to dementia each year.

    Every day the subjects drank a cocoa beverage, which contained either high, intermediate or low levels of flavanols (a key subclass of flavonoids). Their diets were controlled to eliminate other sources of flavanols. After eight weeks, the high-flavanol group did better on a series of memory, verbal fluency and other cognition tests, followed by the intermediate-flavanol group. Their blood pressure, blood sugar control and oxidative stress levels also improved.

    Though flavonoids may have direct effects on neurons and neurodegenerative processes, the researchers concluded that the cognitive benefits were related primarily to better insulin sensitivity, which affects blood sugar control as well as brain function.

    But the benefits may also derive from the cocoa’s effects on cardiovascular health in general—and blood pressure and blood flow in particular—since so much of what’s good for the heart is also good for the brain.

    What to keep in mind

    Not all chocolate or cocoa is rich in flavonoids. In general, the darker the chocolate, the more flavonoids, but it’s hard to judge. The “percent cocoa” listed on some labels is not a reliable gauge. When cocoa powder is highly processed—called Dutch or alkali processed—flavonoids are destroyed. The low-flavonoid drink used in the study contained such highly processed cocoa. The flavonoid-rich cocoa, supplied by Mars, was processed to retain more of these compounds. (Mars also funded the study, and one author worked for the company.)

    Other flavonoid-rich foods and beverages, such as grape juice and tea, have also been linked to cognitive benefits in observational, lab and animal studies. The new study may be the best clinical trial so far testing the effect of a specific food on cognitive function.

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    But don’t assume that chocolate is the only, let alone best, way to protect your aging brain or that it’s a cure for MCI. No one knows what level of flavonoids are needed to improve or maintain brain health, or if the effect would continue in the longer term.

    Bottom line: This research is even more reason to like dark chocolate. Just keep an eye on the calories and sugar content.

  • Exercise Your Body to Benefit Your Brain
    by BERKELEY WELLNESS  |  

    Accumulating research shows that staying physically active is good for the aging brain. The latest study to support this is an analysis of data on 3,700 participants (average age 70) in the well-known Framingham Heart Study, published in the Journals of Gerontology: Medical Sciences. People who were least active were 50 percent more likely to develop dementia during the 10-year follow-up; those who did even “a modest amount” of physical activity had a marked reduction in risk.

     

    In addition, physical activity was associated with increased total brain volume, particularly of the hippocampus, which is involved in short-term memory. One way that exercise may benefit the brain is by boosting cerebral blood flow, which declines with aging. “The brain is a highly metabolic organ that accounts for 20 percent of the oxygen and 25 percent of the glucose consumed even though it is only 2 percent of body weight, which makes it particularly vulnerable to alternations in blood flow,” the researchers noted.

    More support for exercise comes from an analysis of 10 high-quality studies, published in Mayo Clinic Proceedings in August 2016. It concluded that people in their seventies or eighties who engage in regular physical activity “seem to have a 40 percent lower chance of developing Alzheimer’s disease than their physically inactive peers.”

  • Keeping Your Memory in Shape
    by BERKELEY WELLNESS  |  

    As we grow older, we all worry about having “senior moments” that last more than a moment. That’s why brain-training programs have become a big business. Can mental workouts really “improve memory by 10 years” and prevent age-related cognitive decline and even dementia, as the programs claim? (more…)

  • Bringing Mindfulness to Work

    Jason Marsh is director of programs for the Greater Good Science Center (GGSC) at UC Berkeley. In this age of constant distractions and long hours, it’s difficult to find even a few minutes of time to reflect. Yet finding that time and space can help ease the stresses of your demanding working life. Marsh discusses the benefits of mindfulness at work.

    First, what exactly is mindfulness?

    Mindfulness describes a moment-to-moment awareness of your thoughts, feelings, and bodily sensations. It’s a state of being attuned to what’s going on in your body and in the surrounding environment—being in the present moment without thinking about the future or what happened in the past. An essential component of mindfulness is acceptance. Whatever you’re thinking and feeling at that moment is neither right nor wrong. You notice it, and accept it, and move onto the next moment without getting caught up in judging what you’re thinking or feeling.

    How is mindfulness different from meditation?

    They’re practically synonymous but they’re not exactly the same. Mindfulness meditation is one form of meditation, but it’s not the only form. And formal meditation is one way to practice mindfulness, but it’s not the only way. Once you learn mindfulness skills, you can practice them at almost any moment of the day—sitting at your computer, stuck in traffic, even eating. In fact, there has been a lot of interest in promoting mindful eating as a way to help people be more aware of what they eat, to enjoy each bite more, and even to control how much they eat. And there’s also growing interest in using the practice of mindfulness in the workplace to provide a buffer against stress.

    Let’s talk about mindfulness in the workplace. What are the benefits?

    There are many. Some of the earliest studies, which involved the Mindfulness-Based Stress Reduction program founded by Jon Kabat-Zinn at the University of Massachusetts Medical School, showed that mindfulness can help ease stress.Mindfulness fosters positive emotions and helps provide resilience against negative experiences.

    There’s also evidence that the practice of mindfulness promotes empathy and a sense of compassion. Indeed, brain imaging research shows that a half hour of mindfulness meditation a day increases the density of gray matter in parts of the brain associated with memory, stress, and empathy. Finally, mindfulness seems to increase concentration and focus. Research looking specifically at mindfulness in the workplace is relatively new. But there’s good reason to think it makes employees more satisfied and less stressed. A 2014 study of employees at the Dow Chemical Company, for instance, showed that mindfulness training increased vigor, lowered stress, and gave employees a greater sense of resiliency. Preliminary studies suggest that a program in mindfulness also can increase productivity and reduce the number of sick days.

    Are there specific health benefits to mindfulness practice?

    An early, small study suggests that mindfulness may help boost the immune system. By serving as a buffer against stress, mindfulness may also lower the risk of heart disease. A 2015 study looked at people who score high on a mindfulness awareness test and found that they had a healthier cardiovascular risk profile than people with lower scores. One small pilot program also found that mindfulness training helped decrease depression.

    How is mindfulness practice taught?

    There are many different approaches, from apps that provide audio of guided meditations to on-site workplace training programs run by outside facilitators. A growing number of companies are offering mindfulness workshops. The earliest model, developed by Kabat-Zinn, is an eight-week course run by a trained facilitator, with mindfulness exercises that participants practice on their own. But people can learn mindfulness on their own. Simply learning to focus your attention on your breathing in the present moment is a big part of mindfulness. At a new website we’ve created, called Greater Good in Action, we offer several step-by-step guides to mindfulness practices.

    What kinds of companies are taking an interest in mindfulness training?

    Here in the San Francisco Bay area, we’re seeing growing interest. Initially, that was among tech and social media companies. Google has been a pioneer in providing mindfulness practice training for its employees. In fact, an engineer at Google first instituted a mindfulness training program there, which has now become the Search Inside Yourself Leadership Institute, offering mindfulness training for companies around the world. Facebook has its own in-house mindfulness program. Pixar, the animation company, recently set aside a meditation room where employees can go to practice mindfulness. Nationally, General Mills, Ford, insurance giant Aetna and other more traditional companies have also started to offer mindfulness training programs. So have financial firms like Goldman Sachs and BlackRock.

    Some tech companies have been criticized for harsh working conditions. Could mindfulness training become a “Band-Aid” fix to serious workplace problems?

    I think that’s definitely a risk. But given that stress is a reality in many people’s working lives, I think mindfulness can be an effective tool to buffer its negative effects. And ideally, mindfulness may even help change workplaces for the better. Research suggests that mindfulness training helps make people more compassionate and empathetic toward others. By improving the way people relate to one another, ideally it can change corporate culture for the better, creating a more supportive, friendlier workplace with better relationships. In many organizations, there are bigger, systemic changes that need to be made, but I don’t think that instituting a mindfulness program will prevent those changes from happening. At the least, a mindfulness program provides workers with some relief from stress and anxiety while they campaign for systemic changes; at best, it helps to catalyze those bigger systemic changes.

    What advice would you offer someone who works in a company that doesn’t offer mindfulness training?

    You can start by learning how to practice mindfulness yourself, perhaps by taking a class, checking out a mindfulness app, or reading a book with instructions. If you’re happy with the benefits, you can build a community at work by telling your co-workers. If it’s appropriate, you can approach human resource or training departments to see if they have any interest in sponsoring workshops or providing a quiet place where people can go to practice mindfulness.

    How do you use mindfulness training at the Greater Good Science Center?

    We had the idea a few years ago to institute five minutes of silent meditation before staff meetings. People were enthusiastic about the idea, and we’ve been doing it ever since. It helps people have a break with whatever they were doing before the meeting, and to focus their thoughts and respond to one another in a way that’s more thoughtful and respectful.

    This opinion does not necessarily reflect the views of the UC Berkeley School of Public Health or of the Editorial Board at BerkeleyWellness.com.

  • Long Work Hours Take a Toll
    by BERKELEY WELLNESS  |  

    If you work long hours, you may be at increased risk for cardiovascular disease and should thus be extra vigilant in con­trolling risk factors such as high blood pres­sure or undesirable cholesterol levels.

    In a study in the Journal of Occu­pational and Environmental Medicine, researchers from the University of Texas followed a representative sample of 1,926 initially healthy American workers for 25 years. They found a dose-response relation­ship between average hours worked per week for at least 10 years and increasing risk of heart attack, strokehypertension, angina, and other cardiovascular events.

    (more…)