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Superfoods - From Dr. Scherger’s Book: Lean and Fit

A Doctor’s Journey to Healthy Nutrition and Greater Wellness


There are many lists of “superfoods”, known as the healthiest of all foods to eat.  Most of these lists overlap with nuts, seeds, many vegetables, avocados and berries taking center stage.  I compiled the following list from several of the authors cited in this book, especially the list of superfoods from Daniel Amen in his books, Change Your Brain, Change Your Life (2015) and Memory Rescue (2017).  I have organized this list into sections for you to choose your foods from. You could eat only the foods listed here and have a nice variety in your diet and achieve optimal health from the nutrition dimension.

I have only included foods that are commonly known and widely available.  There are recognized superfoods that are exotic and some can only be found as supplements.  Since these are not necessary for an optimal diet I have excluded them to avoid excessive costs and keep a superfood diet accessible to everyone.

There are good and healthy foods not listed here and you may eat them for a healthy diet.  The most important thing to remember is to strive to eat only the foods of nature in their healthy natural state, organic is preferable. Avoid processed foods whenever you can.

Nuts and Seeds

Tree nuts are the only foods that scientific studies have shown to prevent both cancer and heart disease.  Each of the nuts listed here contain different minerals and other nutrients so having several of these types every week, eating some nuts every day you can, is recommended.  

Eat these nuts raw and organic if possible.  Dry roasting nuts changes the health fat into a trans-fat, eliminating much of the healthy nutrition.  Also do not buy these nuts salted to avoid the excessive consumption of salt.

Peanuts are not a nut but a legume and while peanuts have some health benefits, they are not a superfood.

The first three nuts below are the ones I use most commonly in my morning bowl.

Almonds – contain healthy fats, protein and fiber.

Walnuts – along with healthy fats, including omega-3 fatty acids and fiber, contains vitamin E, selenium, magnesium and other anti-oxidants.

Brazil nuts – these are so high in selenium that only 4-6 nuts should be eaten daily.  That is good since they are more expensive than other tree nuts.  They also contain zinc, magnesium, thiamine, healthy fat and fiber.

Pecans – similar to walnuts.

Cashews – a fruit-nut rich in phosphorus, magnesium, zinc and anti-oxidants.

Macadamia nuts – high in healthy fats and lower in protein than other nuts listed here.

Seeds rank up with tree nuts as superfoods for a great source of healthy fats including omega-3 fatty acids, fiber and protein.  The following four seeds are widely available and make a great addition to many foods, including your morning bowl.  Like tree nuts, the various seeds have different nutrients so look for all of them at different times.

Flaxseed – a layer of these go into my bowl every morning.  Use ground flaxseed since we cannot digest the shell of the seed.

Chia seeds – the energy food of the great long distance runners of Mexico, the Tarahumara (read Born to Run by Christopher McDougall).  Chia seeds are now widely available in the US.

Hemp seeds – from the hemp plant, rich in protein, healthy fats, fiber and vitamins.  The seeds have no cannabis.

Sesame seeds – despite their simple and pale appearance, this tiny seeds are a rich source of copper, manganese and other nutrients.


Your daily vegetables should be multi-colored with green being the most important.  There are two types of common vegetable superfoods, cruciferous and leafy.  There is much overlap among these two categories.

The cruciferous vegetable superfoods include: Broccoli, Brussel sprouts, Cauliflower, Horseradish, Radish, and Turnips.  

Broccoli deserves special mention because of its role in DNA methylation, a process of bodily repair, brain health and cancer prevention.  Broccoli should be eaten as often as possible.  If you do not like broccoli, remember the expression, “There is no such thing as a food you do not like, only foods you do not like yet!”  Learn to like what is most healthy.

The green leafy vegetable superfoods include: Arugula, Spinach, Kale, Swiss chard, Watercress, Onions, Cabbage, and Collard greens.

Asparagus does not fit into either of these categories of vegetable, but is one of the best superfood vegetables.

Legumes are a controversial group of vegetables that are healthy for some and toxic for others.  As pointed out by Dr. Steven Gundry in his popular book, The Plant Paradox (HaperCollins, 2017), legumes are loaded with lectins used by plants to avoid being eaten.  These lectins are inflammatory to some people.  These include beans and the nightshade vegetables such as tomatoes and eggplant.  Be mindful if these vegetables give you acne, rosacea, fatigue or other symptoms and avoid them if they do, or prepare them as recommended by Dr. Gundry.  If they do not bother you, they may be among your superfoods.  The Blue Zones all consume legumes and Dr. John Day who I follow (www.drjohnday.com) credits legumes as being among the most important foods for healthy longevity. 


Berries are leading fruits on the superfood list because of their many anti-oxidants and fiber for our microbiome.  Blueberries, Blackberries, Raspberries and Strawberries are all superfoods.  There are other more exotic superfood berries from around the world such as Acai berries, Goldenberry, and Gogi berries.  Have your berries fresh or frozen whenever possible.  Dried berries usually have too much sugar and should be eaten sparingly.

Kiwi and Pomegranates are superfood fruits.

Vegetables grow in the ground and fruit grow in trees.  Hence avocado is actually a fruit and one of the healthiest foods you can eat because it is so filled with healthy fats and protein.  Eat one or more avocados every week.

Because most fruits are high in sugar, they are best eaten whole and limited to 2-3 daily.  All fruit juice is to be avoided because of the high sugar content.  Whole fruits such as oranges, other citrus, peaches, plums, prunes, banana and melons are okay to eat but do not rise to the nutrient level of superfoods.


Olives and Coconut are healthy fruits found in different parts of the world and are most known for their healthy oils. Extra virgin olive oil is a mainstay of the Mediterranean diet while coconut oil is enjoyed in Asia.  These healthy fruits and oils help explain why 3 of the 5 Blue Zones are in the Mediterranean (Ikaria and Sardinia) and in Asia (Okinawa). Cook with coconut oil since it remains stable in the skillet while olive oil breaks down into a trans-fat.  Grapeseed and Avocado also provide superfood oils.  

Animal Products

We humans have been omnivores (eating plants and animals) since the beginning of the human species.  We should eat mostly plants and that is why these foods are listed first.  The only required nutrient that comes from animals is vitamin B12, and vegetarians need to supplement that vitamin. The experts I reference in this book all recommend with good science that an optimal diet usually requires some animal based foods.  Vegetarians have to work hard to get adequate protein, healthy fats and all the micronutrients only from plants, but it is doable.  Also, vegetarians have the lowest rate of cancer and are generally healthier if they focus on the nutrition and avoid refined carbohydrates.  In my Blogs on www.leanandfitlife.com I discuss why I do not agree with many of the leading nutrition experts who promote only a whole food plant-based diet.

When eating animal products you have to be very careful to eat only high quality.  As Michael Pollan states, with animal foods, “you are what you eat”.  Too much animal feed from farming is based on grains, hormones and other artificial chemicals making the product less healthy and are not superfoods.  The foods list below all assume you are buying organically raised foods.  Beef should only be grass fed and fish wild caught and low on pollutants. 


Eggs may be eaten every day!  David Perlmutter, author of Grain Brain and Brain Maker, considers eggs as possibly the best food for the brain, which is mostly made out of cholesterol.  Eggs do not cause heart disease as previously thought.  Eggs are not expensive but spend extra to get healthy eggs from an organic supplier with true free range chickens eating their natural foods.


Healthy seafood has an advantage over meat since they are not associated with increased cancer rates.  Fish from the ocean are healthier than most fresh water fish with the exception of fresh trout or bass from high altitude.  Because our oceans are contaminated with mercury, large fish that eat smaller fish are no longer considered healthy, such as tuna, sea bass, halibut and swordfish.  Dale Bredesen in The End of Alzheimer’s recommends the SMASH fish.  These are:


Mackerel (there are 21 species of Mackerel all named a type of Mackerel plus Wahoo.  See Wikipedia for Mackerel





Other fish may be healthy depending on location.  I also eat shrimp and scallops often.


There are lots of debates which meats are healthiest.  Some favor poultry such as turkey and chicken, and Daniel Amen favors lamb for its omega-3 content.  Grass fed organic beef and pork may be eaten once or twice a week and the serving size should be small, 4-6 ounces.

The healthiest meats are organ meats assuming the source is organic and not contaminated with pesticides or other chemicals.  Our ancestors thrived on organic meat such as liver and bone marrow.  The Inuit in the far North lived on caribou and got their vitamins and micronutrients mostly from the bones and organ meat, and fed the muscle meat to their dogs.  Dr. Terry Wahls (The Wahls Protocol) credits organ meat with helping to reverse her multiple sclerosis.

Bone broth contains many micronutrients and makes an ideal snack or food that may be used during a prolonged fast.


The information presented in this book is the result of many years of practice experience and clinical research by the author. The information in this book, by necessity, is of a general nature and not a substitute for an evaluation or treatment by a competent medical specialist. If you believe you are in need of medical intervention, please see a medical practitioner as soon as possible.
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