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The Positive Impact of Healthy Plant Based Diets

The plant-based diet has been around for over 2000 years, one of the earliest records of vegetarianism was from the Jain population in India in 500 BCE. This is a practice in many cultures and religions now, mostly due to the ethical implications of consuming meat products. Recent studies have shown there are many other environmental and health benefits associated with consuming a plant-based diet.

 

Researchers at Harvard recently published an article with our MASALA Study data that determined the impact of both a healthful and an unhealthful plant-based diets on disease risk. They measured the PDI (plant-based diet index), HPDI (healthful plant-based diet index), and UPDI (unhealthful plant based diet index) for each participant and analyzed the effect on fasting glucose levels, insulin sensitivity, low density cholesterol levels, weight, BMI (body mass index), hemoglobin A1C levels, fatty liver, and future risk of developing diabetes. The best results were seen in participants with high HPDI levels. This means people who consume lots of food like fruits, veggies, whole grains, nuts, daal, or beans. Some examples of unhealthy plant foods are fruit juices, refined grains, potatoes, sugar sweetened beverages, and other sweets and desserts. People who ate a healthy, plant-based diets were likely to have lower fasting glucose, less insulin sensitivity, lower cholesterol levels, lower weight, lower BMI, less fatty liver, and lower hemoglobin A1C levels. Moreover, these individuals were less likely to develop diabetes after 5 years of follow-up. These results show that chronic disease risk can be lowered significantly by simply eating a healthy plant-based diet.  

What have we learned about how Religion/Spirituality may affect Health in the MASALA Study?

What have we learned about how Religion/Spirituality may affect Health in the MASALA Study?

By Blake Victor Kent, PhD

 A lot of research has looked at the relationship between religion and health. Researchers have been interested not only in religious activities like frequency of attending religious services, praying, and meditating, but also in things such as yoga practice, feelings of closeness to God or the divine, and whether people’s interactions with others who practice their religion are positive or negative. Broadly speaking, researchers have investigated not just “religion” per se, but also “spirituality.” Questions related to religion tend to focus more on organizational aspects, while questions on spirituality tend to be about personal experiences outside the confines of institutional religion.

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Thousands of studies have been conducted on religion/spirituality and health, and what constitutes “health” has ranged anywhere from depression to hypertension to cancer to mortality. Most of this research has been conducted in the U.S., typically on samples that are predominantly white and Christian. These studies have often found positive relationships between religion/spirituality and health or no relationship at all. However, in some cases, religion and spirituality have been linked with negative outcomes. Researchers have been able to demonstrate that when the relationship is positive it is often because religion and spirituality provide ways of coping with problems, and when it is negative it is often because of negative perceptions of the divine or negative experiences with others in their religion.

Prior to MASALA there were only two studies examining religion/spirituality and health among U.S. South Asians. Our team of researchers, in cooperation with scholars at Harvard Medical School, published three new papers looking at the associations between religion/spirituality and health in the MASALA study. These studies provide an important foundation for future work in the South Asian population.

The first study focused on religious group involvement, and looked at religious affiliation, religious attendance, participation in group prayer outside of religious services, giving and receiving love and support to and from fellow congregants, experiencing neglect by fellow congregants, and being criticized by fellow congregants. The second study examined private religious and spiritual practices and beliefs, which included frequency of prayer, yoga practice, belief in God/the divine, gratitude, non-theistic daily spiritual experiences (i.e., connections with the transcendent not specific to a religion or god), theistic daily spiritual experiences, feelings of closeness to God/the divine, positive religious coping (i.e., God/the divine provides comfort and support during times of stress), negative religious coping (i.e., feeling punished by God/the divine when things go wrong), religious and spiritual struggles (i.e., stress causes doubt about religious beliefs), and feelings of hope in God/the divine. The third short study looked at one variable: the degree to which people consider themselves to be religious or spiritual.

We examined four different health outcomes for each study: self-rated health (“rate your overall health on a scale of 1-5”), mental health (i.e., depressive symptoms), feelings of anxiety, and feelings of anger.

What did we find? First, for group religion, we found that Jains reported better self-rated health than Hindus and Muslims. Group prayer outside of religious services was associated with better self-rated health and mental health, along with lower anxiety and anger (these were strongest for regular participants). Giving and receiving love and care in the congregation was linked to better self-rated and mental health, along with lower anxiety. Congregational criticism was associated with higher anxiety and anger. Finally, religious service attendance was associated with higher levels of anxiety. Many of these results follow the patterns identified in other studies, largely indicating that participating in group religious practices is related to good health. Congregations provide places for friendship, acceptance, reinforcement of cultural norms and beliefs, and experiences of the transcendent. They also provide relationships that can lead to practical forms of material support, such as financial assistance in hard times or rides to the doctor.

One finding, however, was different than much of the existing literature: here, religious attendance was associated with increased anxiety rather than less anxiety. We suspect this could have something to do with something called “resource mobilization.” In short, when people experience distress they turn to religious sources of support to find help. This means it is possible that increased anxiety might lead to increased religious attendance (rather than the other way around). It is important to note that this finding could emerge since the largest group in the sample – Hindus – tended to report lower levels of attendance (which is expected given differences in organization and practice for this group). About 23% of Hindus attended religious services weekly or more, compared to 66% of Muslims. Evangelicals and Catholics examined in other studies had similar rates of attendance as Muslims. This reinforces the explanation that those who attend services less often sometimes turn to religious resources for support in times of distress.

The second study, which focused on individual (or private) religious and spiritual practices, had a number of interesting findings: yoga, gratitude, non-theistic spiritual experiences, closeness to God, and positive coping were associated with better self-rated health. Gratitude, non-theistic and theistic spiritual experiences, closeness to God, and positive coping were associated with better mental health; negative coping was associated with poorer mental health. Gratitude and non-theistic spiritual experiences were associated with less anxiety; negative coping and religious/spiritual struggles were associated with greater anxiety. Non-theistic spiritual experiences and gratitude were associated with less anger; negative coping and religious/spiritual struggles were associated with greater anger.

The most consistent of these variables was non-theistic daily spiritual experiences, which was beneficially associated with all four of the outcomes. This measure assesses the degree to which the individual lives in the moment and makes spiritual connections between themselves and the world around them. For example, one item states, “I experience a connection to all of life,” and another reads “I am touched by the beauty of creation.” Such “in-the-moment” presence appears strongly related to well-being, regardless of one’s religious affiliation, and we have found that the measure may be especially suited for examining Dharmic faiths (i.e., Hinduism, Jainism, Sikhism, and Buddhism). Many of the other results reflect positive associations for gratitude, yoga practice, and closeness to God/the divine, but negative associations for negative religious coping and religious/spiritual struggles.

Lastly, the third study examined how religious or spiritual people considered themselves to be. Interestingly, we found that being both “very” religious/spiritual or “not at all” religious/spiritual were associated with lower levels of anxiety and higher levels of self-rated health, whereas those identifying as “slightly” or “moderate” religious/spiritual reported higher levels of anxiety and lower levels of self-rated health. This pattern has been seen in a small number of studies of religion/spirituality and health.. Those who are very secure in their faith or those who have no faith at all often appear very similar in terms of health. It is those who are uncertain of their faith, however, those who are “somewhere in the middle” that tend to report worse health. This makes a good deal of sense, since experiences of doubt or frustration in one’s faith are likely to be associated with various forms of ill health, particularly poorer mental health. Of course, in most cases people don’t choose to believe or not believe in their faith for the sake of mental health, but this information provides some insight for religious adherents to examine themselves, their beliefs, and their practices, perhaps in conversation with family members or trusted spiritual advisers.

In summary, religious and spiritual beliefs and practices in the MASALA study appear to be associated with better health. However, these data are preliminary! The riches of the MASALA study will provide many more opportunities in the future to examine religion and spirituality, along with a host of other mental and physical health outcomes.  

Relation of Ectopic Fat with Atherosclerotic Cardiovascular Disease Risk Score in South Asians Living in the United States (from the MASALA Study)

Photograph from Mayo Foundation for Medical Education and Research

Photograph from Mayo Foundation for Medical Education and Research

It is well known that obesity is a risk factor for heart disease. Increasingly we are learning that where that fat is stored also has implications for heart disease risk. The most obvious differences in fat storage location can be seen in the fat distributions of men compared to women, or between those who are apple shaped versus pear shaped. In MASALA, fat has been measured from around the heart (pericardial), in the liver (hepatic), in the muscle (intermuscular), in the body cavity (visceral), and under the skin (subcutaneous). The area under the skin is traditionally considered the primary location of fat storage in healthy normal weight individuals. Fat stored in other locations is generally considered to be an indication of obesity or excess fat. We looked at whether fat stored in these different areas had different associations with heart disease risk using the ASCVD risk score.

In MASALA, we found that more fat around the heart and in the body cavity had the strongest associations with heart disease risk, followed by fat in the muscle. The relationships we observed for heart disease risk with fat in the liver and under the skin were different, suggesting that fat stored in these areas may have a different function. These findings support prior research reporting that fat stored in different locations has different properties, functions, and contributions to heart disease risk. More work is needed to understand why fat gets stored in different locations and how we can use this knowledge to reduce heart disease risk.

Please click here for manuscript.

South Asians may cope with discrimination by consuming more sweets

In a recent analysis of MASALA data, we found that experiences of discrimination, or perceiving unfair treatment in social settings, was associated with poorer dietary intake. Specifically those who experienced the highest amount of discrimination had higher consumption of sweets, both South Asian sweets and American sweets. Experiences of discrimination were not related to fruit and vegetable consumption. 

One explanation for the findings is that experiences of discrimination are shown to be stressful for individuals and eating sweets may be one way South Asians cope with these experiences.  Advanced studies are needed to explore relationships between discrimination and health behaviors among South Asians. Ours is the first known study to demonstrate such links. 

 

Full article: Are Experiences of Discrimination Related to Poorer Dietary Intakes Among South Asians in the MASALA Study?

 

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Acculturation Strategies and Symptoms of Depression

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Culture refers to the symbolic and learned aspects of human groups or societies, including language, beliefs, attitudes, values, norms, and behaviors.  Immigrants who move to the United States (US) from other countries use different strategies to adapt to US culture, which is oftentimes quite different from the culture in which they grew up.  We found that some South Asian immigrants in the MASALA study prefer to combine aspects of US and South Asian cultures, while others show a strong preference for either US or South Asian culture.  We refer to these ways of adapting to life in the US as “acculturation strategies.”  While there is no right or wrong way to adapt to life in a new country, we wanted to know whether people who use different acculturation strategies have different levels of depressive symptoms.  Depression, which is characterized by feelings of sadness and hopelessness and problems with sleeping and eating, is a common mental health problem that is not always recognized or adequately treated by health care providers.  After accounting for some important factors that might cause people to use different acculturation strategies and to have different levels of depressive symptoms, we found that immigrants in the MASALA study who showed a strong preference for South Asian culture had more symptoms of depression than those who showed either a preference for combining South Asian and US cultures or a strong preference for US culture.  Future studies can help us understand why this is the case.  If you or someone you know may be struggling with depression, you should know that effective treatments, including medications and talk therapy, are available.  You can learn more about depression–and how to get help–on this website from the National Institutes of Health:  https://www.nimh.nih.gov/health/publications/depression/index.shtml.

Type 2 diabetes after gestational diabetes mellitus in South Asian women in the United States

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There are a multitude of risk factors for type 2 diabetes. In many women, a history of gestational diabetes mellitus (GDM) has been shown to be a major additional risk factor for type 2 diabetes. GDM is a particular kind of diabetes that is diagnosed in women during pregnancy, which requires treatment with a strict diet and sometimes with medications in late pregnancy. Without proper prenatal care, GDM may remain undiagnosed. Similarly, a history of GDM may not be discussed when screening a woman for type 2 diabetes risk factors many years after a pregnancy.

South Asians are at particularly high risk for both gestational diabetes and type 2 diabetes. In this study, we wanted to determine if South Asian women had a higher risk of type 2 diabetes if they previously had a pregnancy complicated by gestational diabetes.  We found that South Asian women with a history of GDM were three times more likely to have type 2 diabetes than women without a history of GDM.

Our findings underscore the need to support efforts to identify a history of GDM while screening for type 2 diabetes.