Milly Gaines
The decline of America's health has been a topic of discussion for several decades. While the nation's dietary habits don't change much annually, a comparison over 40 years reveals significant changes. The average American consumed 23% more calories in 2010 than in 1970, with a notable increase in grains, corn products, and added sugars. This shift in diet, coupled with sedentary lifestyles, has resulted in high obesity rates and diet-related chronic illnesses, including cardiovascular disease, hypertension, type 2 diabetes, and certain cancers. The issue is further exacerbated by the prevalence of fast food and processed foods, which are typically high in calories, fats, sugars, and sodium. These dietary choices have contributed to rising healthcare costs and mortality rates, with diet-related deaths accounting for over 45% of deaths from heart disease, stroke, or diabetes.
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What You'll Learn
Obesity and diabetes
Poor diet is a significant contributor to obesity. The average American diet tends to be high in calories, saturated fats, trans fats, added sugars, sodium, and refined grains, while lacking in essential nutrients like vitamin D, calcium, potassium, and fiber. The consumption of packaged and fast foods, which are often high in these negative components and low in beneficial ones, is a particular concern. Additionally, the Western diet, characterized by high fat and sugar intake, has been linked to weight gain and various health issues in animal and human studies.
The link between obesity and diabetes is well-established. Obesity is a leading modifiable risk factor for the prevention of type 2 diabetes, which is the most common form of diabetes. Research suggests that obesity contributes to up to half of new type 2 diabetes cases annually in the United States. People with obesity are nearly three times more likely to develop type 2 diabetes compared to those without. The prevalence of diabetes increases with weight classes, with the highest prevalence in individuals with obesity class 3.
Type 2 diabetes is more prevalent among certain racial and ethnic groups, including Black, Hispanic or Latino, American Indian, Alaska Native, Pacific Islander, and Asian American populations. It is worth noting that while obesity is a significant risk factor, the development of type 2 diabetes is influenced by a combination of genetic, lifestyle, and environmental factors. Social determinants of health, such as income and access to nutritious food, also play a role in the higher prevalence of type 2 diabetes among certain racial and ethnic groups.
Addressing obesity and diabetes requires a multifaceted approach. Public health initiatives that promote healthy lifestyles, improve access to nutritious foods, encourage physical activity, and develop community programs to prevent obesity can significantly reduce the burden of these diseases. Additionally, understanding the social and economic factors that contribute to obesity and type 2 diabetes is crucial for developing effective interventions and policies.
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Diet and mental health
The typical American diet is high in fat and sugar, which is associated with cardiac dysfunction, decreased insulin sensitivity, and worsened symptoms of asthma. This dietary pattern has been linked to a greater incidence of depression and depressive symptoms, impaired learning and memory, and an increased risk of developing α-synuclein clumps, a hallmark of Parkinson's disease.
The gut-brain connection is a critical aspect of understanding the link between diet and mental health. Serotonin, often referred to as the "feel-good" neurotransmitter, is primarily produced in the gastrointestinal tract and plays a crucial role in regulating mood, sleep, appetite, and pain tolerance. The production of serotonin and other neurotransmitters is influenced by the intestinal microbiome, which consists of billions of "good" bacteria that protect the intestines, improve nutrient absorption, and activate neural pathways between the gut and the brain.
Nutrition plays a significant role in supporting mental well-being and managing stressors. A healthy gut microbiome, achieved through a diverse and nutritious diet, is essential for maintaining overall health and mental wellness. Studies have found that a diet rich in refined sugars and processed foods can harm the brain and worsen symptoms of mood disorders. On the other hand, a diet that includes whole grains, fruits, vegetables, and healthy fats found in olive oil, rapeseed oil, nuts, seeds, oily fish, avocados, milk, and eggs is beneficial for mental health.
Additionally, social aspects of eating should not be overlooked. Sharing meals with family and friends provides psychological, social, and biological benefits. It gives us a sense of connection, improves digestion, and slows down our eating pace.
While the understanding of the relationship between diet and mental health is evolving, it is evident that dietary choices can influence mental wellness. Improving nutrition can directly impact mental health symptoms and overall mental health.
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Nutritional deficiencies
The most common nutrient deficiencies in the US include vitamin D, calcium, vitamin A, vitamin K, zinc, iodine, folate, iron, potassium, and fiber. Vitamin D deficiency, for instance, affects around 50% of the population, leading to potential issues like bone health, wound healing, and infertility. Similarly, insufficient calcium intake can result in osteoporosis, causing bones to become brittle and fragile. Vitamin A deficiency is also prevalent, impacting vision, skin health, and fertility. Micronutrient malnutrition, caused by a lack of essential vitamins and minerals, affects overall health and increases hunger as the body seeks out these missing nutrients.
Dietary choices play a significant role in this crisis. The Standard American Diet is characterized by high consumption of processed foods, refined grains, added sugars, saturated fats, trans fats, and sodium. This diet is energy-rich but nutrient-poor, leading to weight issues and chronic health conditions. Obesity, cardiovascular disease, type 2 diabetes, and certain types of cancers are among the top health risks affecting Americans and have been strongly linked to dietary choices.
The abundance of processed foods and the high cost of nutritious options contribute to the problem. Grocery stores offer a wide variety of packaged foods that are often more affordable than fresh fruits, vegetables, and lean meats. Additionally, modern agricultural practices can affect the nutrient content of the soil, influencing the nutritional quality of the food grown.
To address these nutritional deficiencies, experts recommend increasing the consumption of nutrient-dense foods such as fruits, vegetables, certain meats, eggs, dairy, and whole grains. Dietary diversity is crucial, and specific diets like Paleo, Nutritarian, Whole 30, and Pegan have gained attention for their potential health benefits. Consulting with healthcare providers and using high-quality supplements can also help address nutrient absorption issues and improve overall well-being.
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Ultra-processed foods
The health risks associated with UPFs are extensive. A recent umbrella review of 45 distinct pooled meta-analyses involving 9.9 million people found direct associations between UPF consumption and 32 harmful health effects. These adverse outcomes span mortality, cancer, mental health, respiratory, cardiovascular, gastrointestinal, and metabolic health.
Specifically, UPFs have been linked to an increased risk of cognitive impairment, strokes, metabolic syndrome, obesity, type 2 diabetes, and abnormal blood lipid levels. The effect of UPFs on stroke risk was found to be greater for individuals who identified as Black compared to those who identified as white. Additionally, UPF consumption is associated with higher blood pressure, which is a key risk factor for cardiovascular disease.
The negative impact of UPFs on health is due in part to their poor nutritional value. UPFs are typically composed of processed carbohydrates that quickly break down into simple sugars, causing spikes in insulin levels, which can disrupt normal brain cell function. As a result, people may experience hunger shortly after consuming UPFs, leading to overeating and subsequent health consequences.
To maintain better brain health and overall well-being, it is advisable to minimise the consumption of ultra-processed foods and prioritise unprocessed or minimally processed alternatives. A healthy diet, such as the Mediterranean diet, that includes fish, olive oil, avocados, whole fruits and vegetables, nuts, beans, and whole grains, can promote improved health outcomes and reduce the risk of chronic diseases associated with UPF consumption.
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Food policy and access
The health of Americans has been declining due to their diet for several decades. Obesity, for example, has become increasingly prevalent, with its prevalence doubling between the 1976-1980 and 1999-2000 National Health and Nutrition Examination Surveys.
One of the most influential pieces of legislation on the US food system is the Farm Bill, which is renewed approximately every five years. The bill addresses various aspects, including providing nutrition assistance to low-income families, insuring farmers against crop loss, and encouraging farmers to adopt sustainable practices. However, the bill's effectiveness in promoting healthy dietary patterns and addressing nutritional challenges is a matter of ongoing debate.
Inequality, poverty, and location are significant barriers to fulfilling the right to food in the United States. Rural or urban food deserts contribute to limited access to nutritious food options. Additionally, financial constraints may lead individuals to make nutritional sacrifices, opting for cheaper, less healthy alternatives. This issue is exacerbated by the higher cost of nutritious foods like fresh fruits, vegetables, and lean meats compared to packaged foods, which often contain excessive amounts of sodium, refined grains, sugar, and unhealthy oils.
The United States Department of Agriculture's (USDA) Economic Research Service (ERS) plays a pivotal role in researching food security and its impact on the well-being of diverse populations. Their studies encompass food security in US households, its relationship to public policies and assistance programs, and its connection to economic factors. However, it is worth noting that the right to food is not federally recognized in the United States, with Maine being the only state to codify this right in its constitution.
The Supplemental Nutrition Assistance Program (SNAP), administered by the USDA, has been a focal point of discussion among lawmakers, with some advocating for more stringent eligibility requirements and others striving to expand access to those in need. These policy debates reflect the ongoing challenges in ensuring equitable access to nutritious food for all Americans.
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Frequently asked questions
America's health has been in decline since the 1970s, with the average American consuming 23% more calories in 2010 than they did in 1970.
The decline in America's health has been attributed to a variety of factors, including increased consumption of processed foods, fast foods, added sugars, and sodium, as well as a lack of fresh fruits and vegetables in their diets.
The American diet has shifted towards more processed and packaged foods, with an increase in added sugars and unhealthy oils. Americans also consume more grains, mostly in the form of refined grains, and less dairy than recommended.
The American diet has been linked to weight gain, obesity, and chronic illnesses such as cardiovascular disease, cancer, type 2 diabetes, and asthma. It has also been associated with mental health issues such as depression and impaired learning and memory.
To improve the American diet, individuals can make small changes such as choosing whole grain bread over white bread, increasing fruit and vegetable intake, and reducing consumption of processed and fast foods.
