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The inspiration for this article was some questions from someone on Facebook on the topic of a live interview on the Cancer Summit with Dr. Natasha Campbell McBride, author of Gut and Psychology Syndrome. The topic is whether consumption of an exclusively plant-based diet versus one that includes animal-foods is optimal, and the impact those dietary choices have on health.

The reader asks about Dr. McBride’s claim that plants are indigestible. The reader understands that this recommendation runs contrary to advise with which she has been most familiar from mainstream medical and health authorities and that the reduction of animal foods and increase of vegetables and other plant foods is the preferable recommendation for optimal health.

We are presented with these questions:

  1. Is there a correlation between eating more plants in the diet and better health?
  2. Are plant-based diets superior to animal foods for health?

Because there are misconceptions regarding plant-based and animal diets, I thought it would be helpful to post this question and the answer to it here.


“I’m listening to Natasha Campbell-McBride on the Cancer Summit. She says we are to eat animals-meat, fish, eggs, dairy, which are foods that FEED us and build the body. She says plants are indigestible in the stomach, do not feed us, but CLEANSE us. This is the first I am hearing this said in this particular way. I have not read her GAPS book yet. What about phytonutrients, ORAC, bioflavonoids, etc. that supposedly keep us healthy?! How can she throw all that out the window? Can you explain? This summit is available until 10 a.m. tomorrow.” (NOTE: interview is no longer available to hear at no cost, but this site periodically makes promotional content available for a limited time)

Before I post the answer: I want to talk a bit about recommendations from health authorities which call for plant-centered diets and advise reducing intake of animal foods.

Movies such as Forks Over Knives, books such as The China Study authored by Dr. T. Colin Campbell, and campaigns such as the Environmental Working Group’s Meatless Mondays have popularized the idea that eating a plant-centered diet is healthier than one that includes animal foods.

Some arguments which favor plant-based diets include:

I won’t address all bullet items above. Instead, I will focus on the presence of nutritional deficiencies of an exclusively plant-based diet. Later in this article, I will explain why we would want to consume animal foods in our diet, which includes eating plant foods using traditional preparation methods to maximize digestibility and nutritional benefits of those foods.

As another example of a widely recognized source for dietary guidelines which recommend consuming more plant and less animal foods, USDA Dietary Guidelines, (formerly My Plate), provides these suggestions:

Some notes regarding USDA Dietary Guidelines:

Conventionally-sourced plant foods

My Plate as well as other proponents of plant-based diets do not acknowledge the sourcing or production methods of vegetables, grains, legumes, fruits, or other foods. There are clear differences in conventionally-grown plant foods, and those produced by organic and sustainable methods.

Pesticides, herbicides, and chemical fertilizers

Most plants and other foods such as grains and nuts are sourced from conventional growing facilities which likely use herbicides and pesticides, and chemical fertilizers. Use of these chemicals has been linked to higher incidence of chronic health issues. Pesticide application has been linked to an increase in various forms of cancer including breast, and prostate as well as leukemia and non-Hodgkins lymphoma, reproductive harm, an increase in autism spectrum disorders, and is particularly dangerous for children who are more vulnerable to health risks due to their smaller body size and faster metabolisms.

One paper shows a possible increase in prostate cancer among farmers, while another published in Environmental Health Perspectives shows that infants whose families reside in close proximity to crops treated with widely used pesticides were more likely to develop autism.

The use of chemical fertilizers is also problematic as the addition of synthetic nutrients creates an imbalance in the soil and contributes to health issues including thyroid problems and cancer.

Herbicides such as Monsanto’s Roundup have been linked to various health problems including Alzheimer’s disease, birth defects, cancer, obesity, Celiac disease and gluten intolerance, depression, and diabetes. For more information, visit Ecowatch.

For more information on the risks of pesticides, visit Toxics Action and Beyond Pesticides.

Mono crops

Growing environments for many plants and grains produce crops using mono-crop methods. The practice of mono cropping reduces nutrient values of food. According to Sustainable Table, “Monocropping refers to the practice of growing only one type of agricultural product in a large area of land, year after year. In industrial crop production, monocropping is used to facilitate planting and harvesting across large pieces of land (as well as the application of pesticides and fertilizers), often using specialized farm equipment.” Corn, soybeans, and wheat are examples of 3 common crops that are grown using mono crop techniques.

For more information on how mono cropping can affect nutrient levels in soil, refer to this study and this article from Natural Resources Management and Environment Department on practices that influence the amount of organic matter present in soil. Mono crop farming lowers bacterial diversity and nutrient levels that are critical to the health of crops.

Genetically-modified plant foods and reasons to avoid

Another concern not typically addressed in standard recommendations is the consumption of genetically-modified plant foods. Some of the most widely produced plant foods such as the canola plant, corn, soy, cottonseed, are grown with genetically modified seeds and sprayed with herbicide or contain built-in pesticides (corn) which have been cited as a culprit for various chronic health issues. Conventional wheat which has currently not been approved yet for genetic modification is usually sprayed with herbicides. 

Research reveals the active ingredient in Roundup, Glyphosate, disrupts soil as well as gut bacteria, and also contributes to various chronic health issues. In 2015, The World Health Organization published research in the respected medical journal, The Lancet that shows the use of Roundup is probably carcinogenic.

For more information on how these chemicals alter soil and gut bacteria, see this study from Dr. Stephanie Seneff, MIT scientist and researcher.

What about saturated fat?

In more than several instances, USDA Dietary Guidelines recommend consuming vegetables since they contain fewer calories and fat, which is reiterated as a way to achieve optimal health. One recommendation advises to “go light on the salad dressing”.

Salad dressing typically contains some type of fat. However, not all fats are created equal. Many salad dressings contain modern fats such as canola, soybean, and cottonseed. All of these have been recommended in favor of animal fats since the 1980s via the USDA dietary guidelines.

These fats are not traditional, and are produced using industrial farming methods. Not only are they produced in ways that render them indigestible to the human body, but these fats are also usually sourced from genetically-modified crops.  The Institute for Responsible Technology explains how these products are produced by introducing “foreign genes forced into the DNA of the plants they come from. The inserted genes come from species such as bacteria and viruses, which have never been in the human food supply.” Consumption of these foods has been linked to reproductive issues, liver disease, increase in allergies, cancer, and death. For more information on how industrial fats have taken precedent over animal fats, see The Oiling of America.

Real fats used in salad dressings such as olive and coconut oil, although not primary sources of saturated fat from animal foods are real, traditional fats that are optimal for health.

What are the health benefits of saturated fat for optimal health?

Coconut oil is a nourishing, non-animal based traditional fat which contains Vitamin E, K and iron.

Examples of traditional animal foods include meats, eggs, organs and full-fat dairy products. It is of critical importance to select foods from animals that consume a natural diet, such as meat from grassfed cows. These animals are typically not administered antibiotics, hormones, or consume feed treated with herbicides, pesticides or other harmful chemicals, or consume genetically-modified feed such as grains, corn, or alfalfa. Grassfed meat, pastured eggs and dairy from pasture-raised animals contain more of the nutrients listed above than their industrially-raised counterparts.

Although typically grassfed and pasture raised animal foods are produced without chemicals, antibiotics, genetically-modified feed, it is advisable to always know how your food is produced. Ask questions of the farmer from where you purchase your food.

Here are a few papers showing the importance to human health of nutrients found in foods from animals raised on pasture:

Effect of feeding systems on omega-3 fatty acids, conjugated linoleic acid and trans fatty acids in Australian beef cuts: potential impact on human health. EN Ponnampalam, et al

Effect of pasture vs. concentrate feeding with or without antioxidants on carcass characteristics, fatty acid composition, and quality of Uruguayan beef, C.E. Realini, et al.

A review of fatty acid profiles and antioxidant content in grass-fed and grain-fed beef, Cynthia A Daley, et al.

Among helpful attributes of cholesterol and fat including digestive and immune support, anti-cancer development, brain, mood and neurological support, cell and hormone production. Saturated fat found in animal foods and other fats such as coconut oil has been observed to not only increase levels of HDL (beneficial cholesterol) in the body, but also aids in conversion of the LDL (unfavorable cholesterol) into beneficial cholesterol.

Nina Teicholz, author of The Big Fat Surprise: Why Butter, Meat, and Cheese Belong in a Healthy Diet and Dr. Mary G. Enig, PhD, co-author of Eat Fat Lose Fat, and scientist and lipid researcher have written about the necessity of saturated fats for health.

Consuming animal foods does not increase the risk of heart disease and increased cholesterol

In recent years, a number of scientific studies showing an inverse correlation between heart disease and consumption of saturated fat have become more visible. These studies are not new, but have been largely ignored and censured by mainstream dietary and health authorities. For decades, these sources have incorrectly claimed that saturated fat and cholesterol are harmful to human health.

The questionable role of saturated and polyunsaturated fatty acids in cardiovascular disease, U. Ravnskov.

A systematic review of the evidence supporting a causal link between dietary factors and coronary heart disease, Mente A, et al.

Meta-analysis of prospective cohort studies evaluating the association of saturated fat with cardiovascular disease, Patty W Siri-Tarino, et al.

Let’s review the question I started with: 

“I’m listening to Natasha Campbell-McBride on the Cancer Summit. She says we are to eat animals-meat, fish, eggs, dairy, which are foods that FEED us and build the body. She says plants are indigestible in the stomach, do not feed us, but CLEANSE us. This is the first I am hearing this said in this particular way. I have not read her GAPS book yet. What about phytonutrients, ORAC, bioflavonoids, etc. that supposedly keep us healthy?! How can she throw all that out the window? Can you explain? This summit is available until 10 a.m. tomorrow.”


I did not have an opportunity to hear the cancer interview mentioned by the commenter, but have read Gut and Psychology Syndrome and have taught workshops on preparing healing foods for the GAPS protocol. Here is my response:

McBride does not advise against eating plants, but discusses ideal ways to prepare for maximum nutrient intake. Plants, grains, legumes, nuts, corn, and soy all contain phytic acid.  As two examples of traditional preparation, fermentation and and acid-soaking before cooking both neutralize phytic acid. Consuming phytates can cause mineral loss in the body that can leach minerals from our bones.

In modern industrial societies, populations have consumed these foods in not only larger quantities than our ancestors, but also in the ways of convenience rather than traditional preparation. In other words, we consume these foods in their processed forms rather than how our ancestors would have done. These practices contribute to digestive compromise and chronic disease of many types.

Dr. McBride recommends juicing only for short term detox. Other considerations may include those with oxalate-sensitivities or those with thyroid issues. In those cases, a person would avoid chocolate, seeds, nuts, spinach, beets, chard, okra, parsley, leeks, blackberries strawberries, celery, collards, and purple fruits such as plums and grapes, and also figs. Thyroid challenges would call for avoiding cruciferous vegetables such as broccoli, cauliflower, bok choy, cabbages, mustard plants, and Brussels sprouts. McBride advises preparing any plants a person may be having sensitivities to after healing by slow-cooking and using low-heat temperatures, served with animal fats such as butter, ghee, lard, tallow or schmaltz (chicken fat), and/or fermented.

In another interview, Dr. McBride confirms from her clinical experience that fats are essential for the healing process. The molecular structure of fats is so similar to our own and easy to absorb, especially considering the nutrient-dense quality of fats. She recommends that some patients who experience severe intestinal tract damage can eat a diet of 90% fat. The more fat they eat, the more quickly they heal. Hear this interview with Dr. Mercola for more details.

Other authors such as Ramiel Nagel have also discussed how even fermentation and souring in grains, nuts, and other foods does not sufficiently reduce phytic acid levels to justify consuming them. This would be especially true of anyone with compromised digestive systems and chronic disease, which is becoming more visible in industrial populations due to poor dietary habits and lifestyles.

For more information on this topic, I recommend reading Ramiel Nagel’s book Cure Tooth Decay.

To recap, plant-based diets lack supportive properties necessary for human health due to the following:

Recommendations to consume animal fats for optimal health are supported by practitioners and experts such as Dr. Natasha Campbell McBride and other respected experts including Dr. Thomas Cowan, M.D., author of The Fourfold Path to Healing, Nora Gedgaudas, NC and author of Primal Body, Primal Mind, Louisa L. Williams, MS, DC, ND, author of Radical Medicine, and The Vegetarian Myth by Lierre Keith.

Consuming plant foods that are produced organically and without pesticides, herbicides, are not genetically-modified, and are prepared traditionally either served with traditional fats raw or cooked, or fermented is recommended when also consumed in conjunction with a diet that includes mindfully-sourced animal foods from beef, lamb, pork, poultry, dairy from pastured sources and / or wild game meats.

The bottom line:  recommendations to seek out phytonutrients, antioxidants, ORAC, bioflavinoids, and other properties found in plants for optimal for health have not taken into consideration the methods by which these foods have been historically grown or raised, prepared and consumed. Consuming raw plants and other foods without traditional preparation can actually cause harm to consume due to phytic acid, food sensitivities and digestive compromise. Foods from animals raised on pasture are naturally produced and contain nutrients needed to support optimal health.

I highly recommend Gut and Psychology Syndrome  by Dr. Natasha Campbell McBride, even if you do not follow the GAPS diet. Her research into how the digestive tract functions, what can go awry under conditions of less-than optimal lifestyle and diet, as well as the healing protocol she developed, is eye-opening. Although many, many people have seen great benefit and healing from this diet, it is not a cure-all for everyone. I also encourage you to hear her interviews. Listen to this recent interview with Dr. McBride and Acres USA.