My journey into this realm of nutritional research began in 2022, driven by my own struggles with chronic health issues that mainstream medicine failed to adequately address. Frustrated by the lack of solutions, I turned to a Functional Medicine Practitioner, which set me on a transformative path that fundamentally challenged my previous beliefs about what constitutes a healthy diet. This exploration has been particularly eye-opening, considering my background includes graduate-level education in food science, food engineering, biochemistry, and a bit of human nutrition. For over 40 years, I dedicated my career to commercial food processing, initially believing that our industry held the key to feeding a growing global population. However, my views have since evolved, leading me to question whether the very industry I once championed—alongside big agriculture, big grocery, and big pharma—might be contributing to significant health problems.
This shift in perspective has been further reinforced by the experiences of family members and friends who adhere to strict vegetarian or vegan diets. Despite the popular belief within my own extended family that plant-based diets are the healthiest choice, I have observed concerning patterns of dangerously low body mass index (BMI), heart problems, anxiety, depression and premature cognitive decline, including Alzheimer’s disease and early death among those following these diets. In contrast, those family members who have consumed a more balanced diet, including animal products, seem to generally maintain more robust health and live well into their 90s and even longer.
From January 2013 to May 2024, I was deeply involved in establishing and launching the Food Shed Co-op in Woodstock, Illinois, a project that includes a commercial kitchen designed to offer prepared food items. Due to the overwhelming demands of building a business from the ground up, we outsourced the creation of recipes, paying little attention to ingredient selection. Shortly after opening, however, we received feedback from nutritionally informed customers criticizing our use of seed oils in our prepared foods. Upon reflection, I realized that even if we had scrutinized our ingredient choices more closely, it is unlikely that seed oils would have been flagged as problematic, given the long-standing narrative in America that has promoted them as healthy alternatives to saturated fats. This narrative, largely shaped by big agricultural processors, the pharmaceutical industry, and the American Heart Association (which gained significant support from Procter & Gamble during the rise of Crisco in the 1950s), is now being increasingly challenged by emerging scientific evidence.
At the request of the General Manager of the Food Shed Co-op, I have compiled this position paper, summarizing what I have learned since embarking on this journey in 2022. Not only has my investigative research improved my own metabolic health, it has also deepened my understanding of the profound impact that dietary fats, particularly seed oils, can have on health. My hope is that this paper will inspire the removal of seed oils from the prepared foods offered at the Food Shed Co-op and perhaps encourage other co-ops to consider similar changes. Co-ops are uniquely positioned to lead societal change, and with its commitment to fostering better food choices, the Food Shed Co-op has the potential to take meaningful steps towards eliminating seed oils, starting in our own kitchen and eventually influencing the broader grocery landscape.
Introduction
In recent decades, the American diet has undergone a significant transformation, with seed oils such as soybean, corn, sunflower, safflower, grapeseed and canola (aka culinary rapeseed) oils becoming ubiquitous in processed foods, fast foods, and even in home cooking. These oils, often marketed as heart-healthy alternatives to saturated fats, have raised growing concerns among nutritionists, healthcare professionals, and consumers. This paper explores the potential hazards associated with the pervasive use of seed oils in the American diet, examining the implications for health and well-being, particularly in the context of cholesterol and its impact on health.
The Composition of Seed Oils
Seed oils are rich in polyunsaturated fatty acids (PUFAs), particularly omega-6 fatty acids. While omega-6 fatty acids are essential for health, they must be balanced with omega-3 fatty acids to maintain optimal bodily functions. However, the modern American diet has seen an unprecedented increase in the ratio of omega-6 to omega-3 fatty acids, largely due to the overconsumption of seed oils.
Health Risks Associated with Seed Oils
1. Inflammation and Chronic Diseases
An imbalanced intake of omega-6 fatty acids, as seen with the heavy use of seed oils, can promote chronic inflammation. Chronic inflammation is a key contributor to a range of diseases, including heart disease, cancer, type 2 diabetes, and autoimmune conditions. Studies have shown that a high omega-6 to omega-3 ratio is linked to an increased risk of these chronic diseases.
2. Oxidative Stress and Free Radical Formation
Seed oils are highly prone to oxidation due to their high PUFA content. When these oils are exposed to heat during cooking or processing, they can form harmful compounds, such as aldehydes, which have been linked to cellular damage and increased cancer risk. The oxidative stress caused by these compounds is a significant concern, particularly given the widespread use of seed oils in fried and processed foods.
3. Cardiovascular Health and the Cholesterol Debate
Although seed oils have been promoted as heart-healthy due to their ability to lower LDL cholesterol, the overall impact on cardiovascular health is more complex. Some studies suggest that while these oils may reduce LDL cholesterol, they do not necessarily translate to a lower risk of heart disease. Moreover, the inflammatory and oxidative properties of seed oils may counteract their cholesterol-lowering benefits, potentially contributing to cardiovascular problems. Recent discussions by experts like Dr. Paul Saladino and Dr. Georgia Ede have challenged the conventional view that LDL cholesterol is a significant concern for most healthy individuals. Saladino argues that LDL cholesterol is not inherently harmful and that the focus should instead be on reducing oxidative stress and inflammation, which are exacerbated by the consumption of seed oils. Ede supports this perspective by highlighting the role of inflammation in various chronic diseases, including those affecting mental health.
4. Potential Role in Obesity
The high omega-6 content of seed oils may also play a role in the obesity epidemic. Research has suggested that omega-6 fatty acids can influence fat storage in the body by activating certain genes involved in adipogenesis (the formation of fat cells). Given the prevalence of seed oils in processed and fast foods, this could be a contributing factor to the rising rates of obesity in the United States.
5. Impact on Brain Health
Dr. Georgia Ede is a Harvard-trained psychiatrist specializing in nutritional and metabolic psychiatry. In her 2024 book Change Your Diet, Change Your Mind, Dr. Ede has specifically highlighted the dangers of seed oils in the context of brain health. Ede explains why nearly everything we think we know about brain-healthy diets is wrong and how high levels of omega-6 fatty acids in these oils can lead to chronic brain inflammation, which is a known contributor to mental health disorders such as depression, anxiety, and cognitive decline. Furthermore, the oxidative stress caused by the consumption of seed oils can damage brain cells, exacerbating these conditions.
The Rise of Seed Oils in the American Diet
The widespread adoption of seed oils in the American diet can be traced back to several key developments:
1. Industrialization and Agricultural Policies
The industrialization of agriculture in the 20th century, supported by government subsidies for crops like soybeans and corn, led to an oversupply of these crops. This surplus was channeled into the production of inexpensive seed oils, making them a cost-effective option for food manufacturers.
2. Promotion by Health Organizations
The American Heart Association (AHA) played a significant role in promoting seed oils as a healthier alternative to saturated fats. In the late 1940s, Procter & Gamble, a major producer of Crisco (a product made from partially hydrogenated cottonseed oil), made a substantial donation to the AHA, which helped transform the organization into a national force. This financial support coincided with the AHA’s endorsement of polyunsaturated fats, including those found in seed oils, as part of a heart-healthy diet.
3. Marketing and Consumer Trends
Seed oils were heavily marketed as modern, healthy alternatives to traditional animal fats. As a result, they became deeply ingrained in the American diet, particularly as consumers sought to follow the AHA’s recommendations for reducing saturated fat intake. As one author put it: America’s have been polyunsaturating themselves since the 1950’s.
Alternatives to Seed Oils
Given the potential hazards associated with seed oils, there is a growing interest in alternative fats and oils that may offer health benefits without the associated risks. Options such as olive oil, avocado oil, coconut oil, and butter, which contain more stable monounsaturated and saturated fats, are being re-evaluated for their roles in a balanced diet. Additionally, increasing the intake of omega-3-rich foods, such as fatty fish and flaxseeds, can help to restore a healthier omega-6 to omega-3 ratio.
Conclusion
The pervasive use of seed oils in the American diet represents a significant public health concern. While these oils have been promoted for their cholesterol-lowering effects, the potential risks associated with their high omega-6 content, propensity for oxidation, and contribution to chronic inflammation cannot be ignored. Furthermore, the current understanding of cholesterol suggests that it may not be the health concern it was once thought to be for most healthy individuals, shifting the focus toward the quality of fats consumed rather than simply managing cholesterol levels. To mitigate these risks, it is essential to consider alternatives to seed oils and to promote a diet that emphasizes whole, unprocessed foods with a balanced fatty acid profile. Public health initiatives should focus on educating consumers about the potential hazards of seed oils and encouraging dietary patterns that support long-term health and well-being. Marketing opportunities exist for seed oil free kitchens to attract eaters looking for seed oil free dining options. Websites and apps now exist to help find seed oil free dining, e.g., https://www.seedoilscout.com/ and https://localfats.com/browse/US/Illinois/Chicago.
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