Book summary “The Green Pharmacy”: summary

Introduction

You often rely on processed foods and synthetic drugs when health problems strike, yet these single-ingredient pharmaceuticals frequently trigger unwanted side effects. Modern diets strip away vital nutrients, leaving your body vulnerable to chronic ailments and minor illnesses alike.

James A. Duke introduces you to the green pharmacy, where everyday culinary herbs and whole plant foods provide safer, more effective healing alternatives. You learn how complex phytochemicals work synergistically within plants to match pharmaceutical efficacy without the associated dangers.

The book guides you through adopting a plant-rich diet, mastering top healing foods, and applying specific botanical remedies for everyday and chronic conditions.

You will discover answers to questions such as:

• Which everyday kitchen foods contain powerful medicinal compounds?
• How do you prepare plants to maximize their healing potential?
• What natural remedies effectively target chronic pain and infections?
• Which whole food combinations protect your cardiovascular and immune systems?

1. How Foods Heal

Modern medicine often looks for a single active ingredient and discards the rest. Plant foods instead provide complex mixtures of phytochemicals that have co-evolved with humans. You can rely on these whole foods as safer alternatives to pharmaceuticals.

Whole plant foods provide complex phytochemicals that work synergistically to treat illness and match pharmaceutical efficacy.

In the United States in 2005, pharmaceuticals caused 140,000 deaths. Herbs and supplements caused an estimated 29 deaths that same year. You find a better living through chemistry by avoiding the silver bullet approach of commercial drugs.

Ginger has consistently beaten the drug Dramamine for motion sickness in studies. A half-pomegranate provides phytoestrogens equivalent to a daily dose of hormone replacement therapy.

Food versus Pharmaceuticals

Ancient medical systems utilize foods as fundamental therapies to treat illness and restore internal balance. Ayurveda utilizes healing spices like turmeric for arthritis, Alzheimer's, and cancer. Traditional Chinese Medicine views foods through the lenses of yin and yang, prescribing specific items to correct internal imbalances.

Practitioners of Traditional Chinese Medicine treat a yin-skewed mucus-producing cough with warming and drying foods like ginger tea and hot vegetable soups.

Limitations of Supplements

Isolated vitamin supplements and megadoses do not replicate the health benefits of whole foods. High doses of vitamin C above 1,200 milligrams can cause diarrhea. Pure beta-carotene supplements can increase lung cancer risk in smokers and drinkers.

The HOPE study gave more than 10,000 heart disease patients 400 IU of vitamin E or a placebo daily for six years. The study concluded it did not significantly prevent adverse heart disease outcomes.

Plant foods provide a vast array of micronutrients and phytochemicals, including antioxidants and specialized flavonoids. Researchers have identified 4,000 different flavonoids to date. Three Brazil nuts supply 200 micrograms of the antioxidant selenium.

2. Eating for Optimal Health

Adopting a modified plant-rich diet avoids the dangers of processed foods and supplies necessary medicinal diversity.

Processed Diet Dangers

The modern American diet relies heavily on processed foods and simple carbohydrates. This contributes significantly to widespread obesity and chronic illness. Processed white foods cause rapid blood sugar spikes. Artificial trans fats created via hydrogenation elevate bad LDL cholesterol while lowering good HDL cholesterol. These unhealthful foods displace nutrient-dense whole foods on the plate.

Centers for Disease Control and Prevention data show two-thirds of all Americans are overweight and half of overweight Americans are obese. Almost 20 percent of American children are overweight. Children born in 2000 or later face a 1 in 3 chance to develop type 2 diabetes.

Practical Eating Strategies

Strict vegetarianism can be difficult to maintain. It risks dangerous protein and vitamin B12 deficiencies if not executed carefully. Following historical precedent allows you to make vegetables the foundation of your diet while using small amounts of animal food strictly as a condiment.

Thomas Jefferson described his temperate diet in 1819 as eating little animal food and using it not as nourishment but as a condiment for vegetables.

Incorporating diverse healing foods into daily life requires specific eating patterns:

• Eat like your ancestors by matching your food intake to your body's needs and including a blend of fruits, vegetables, whole grains, and meat if craved.
• Be a Jeffersonian vegetarian by using meat as a smaller component to flavor a vegetable-based dish rather than as the main course.
• Stick to the S's by incorporating healthful fruits, vegetables, and herbs into soups, stews, and salads.
• Go grazing by eating five or six small meals throughout the day and keeping the house stocked with nuts and dried fruits instead of cookies and crackers.
• Utilize restaurant salad bars and buffets by taking very small portions of dozens of different fruits, vegetables, and salad items to maximize chemical diversity.

3. Duke's Dozen and Making the Most of Food

Dr. Duke's top twelve healing food categories offer profound disease-fighting benefits and can be easily incorporated into the daily diet.

The top twelve disease-fighting foods provide the best nutritional value. They contain healers for Alzheimer's, arthritis, cancer, colds, gout, heart disease, and menopause. Often entire food families are included because related items share beneficial traits.

• Incorporate beans, bulbs, caffeinators, celery, cinnamon, citrus fruits, ginger, mints, peppers, pomegranates, turmeric, and walnuts into your daily meals.

Garlic contains sulfur compounds like alliin that convert to allicin, which prevents blood clotting, boosts immunity, and fights cancer. Cooking garlic diminishes its potency, so it is best used raw or added near the end of cooking.

Larry Lawson, PhD, a garlicologist, advised Dr. Duke that the skin of a garlic clove should be broken before entering the GI tract. Cooking garlic for 10 minutes causes a 40 percent loss of original potency. Garlic contains over a dozen immunity-boosting compounds.

• Nick the surface of a garlic clove before eating it instead of swallowing it intact.
• Add garlic near the end of cooking soups or stews to minimize potency loss.
• Eat parsley, coriander, or green tea to help quell the smell of garlic.

Chocolate, coffee, and tea are packed with polyphenol antioxidants that act as super antioxidants and protect against heart disease and cancer. These three foods contain potent polyphenols that scavenge free radicals, boost mood, and improve alertness. Worldwide caffeine consumption reaches 120,000 tons per year.

• Limit coffee and tea intake to 2 cups a day or less.
• Limit dark chocolate intake to no more than 3 ounces a day.
• Choose dark chocolate with 60 percent or higher cocoa content.

Pure cinnamon contains a flavonoid compound that activates cellular insulin receptors, helping to regulate blood sugar effectively. The compound methylhydroxy chalcone polymer mimics the action of diabetes medications.

• Add cinnamon to oatmeal or coffee instead of mixing it with sugar on toast.
• Use a nonnutritive sweetener like stevia if a sweetener is needed with cinnamon.
• Suck on a cinnamon quill as a substitute for smoking when an urge arises.
• Stick to a teaspoon or less of cinnamon daily to avoid large toxic doses.

Creative Cooking Methods

Buying local produce and understanding plant stress factors can maximize the intake of medicinal secondary metabolites and avoid pesticides.

Modern farming practices and long transport distances diminish nutrient density and volatile medicinal compounds in produce. Stressed plants actually produce higher levels of beneficial secondary metabolites. Donald Davis, PhD, a biochemist at the University of Texas, reported significant declines in 6 of 13 major nutrients over the past 50 years. Potatoes lost vitamin A, vitamin C, iron, and calcium during this time.

An Environmental Working Group study found that 97.3 percent of nectarines tested positive for pesticides. In contrast, only 0.7 percent of onions tested positive.

• Buy as much produce as possible locally from farmers' markets.
• Grow fruits, vegetables, and herbs in a modest yard, indoor containers, or a garden.
• Choose organic options for the most pesticide-heavy foods identified by environmental guides.

Cooking methods, leaving peels on, and adding fats or black pepper significantly enhance the absorption and potency of food nutrients. A half cup of chopped red pepper contains 142 milligrams of vitamin C.

• Undercook vegetables to retain a mix of raw and cooked nutrients.
• Consume the cooking broth or pot-liquor from boiled vegetables to avoid losing leached nutrients.
• Leave the skins on potatoes, eggplants, and apples to retain phytochemicals.
• Put onion skins and carrot shavings into mesh bags or directly into soups and stews.
• Grind fresh black pepper onto turmeric dishes to enhance curcumin absorption.
• Add a little oil like olive oil to salads or stir-fries to aid carotenoid absorption.

4. Healing Everyday Ailments

Specific botanical remedies and kitchen foods relieve common conditions from altitude sickness to canker sores.

High elevations cause fluid retention and dehydration as the body struggles against decreased oxygen density. Blood-thinning and diuretic herbs, along with high-carbohydrate foods and aggressive hydration, help alleviate and prevent symptoms. Dr. Duke successfully prevented altitude sickness at Machu Picchu using coca leaves, and Japanese mountain climbers use oil of thyme.

• Limit ascents to 300 feet a day to allow the body to adapt.
• Drink at least 3 to 4 quarts of water a day to maintain hydration.
• Eat small meals of high-carbohydrate, low-fat foods prior to and during high-altitude climbs.
• Steep cloves, allspice, bay leaf, cinnamon, and marjoram to make Altitude Adjustment Tea.
• Consume 60 to 240 milligrams of standardized ginkgo extract a day.

Angina involves chest pain signaling restricted blood flow to the heart due to arterial plaque. Nutrients like CoQ10, L-carnitine, L-arginine, anthocyanins, and bromelain help dilate blood vessels, reduce blood viscosity, and improve cellular energy production. In a study of 73 people with serious heart disease, those taking 120 milligrams of CoQ10 had significantly fewer angina attacks than those taking a placebo. In another study, 94 percent of people receiving an herbal mixture containing angelica experienced total disappearance of angina.

• Eat at least two fishy meals a week, including codfish.
• Consume foods high in L-arginine such as avocados, sunflower seeds, and almonds.
• Eat bilberries, blackberries, blueberries, and cherries for anthocyanins.
• Drink two 8-ounce glasses of cantaloupe juice daily.
• Follow a low-fat vegetarian diet similar to Dr. Dean Ornish's program for a month.

Travel and Circulatory Ailments

Vitamin C stops histamine release, which causes wheezing and runny noses, while flavonoids in these foods provide additional anti-inflammatory protection for the bronchial tubes. A 2004 study of over 4,000 children showed that those with lower vitamin C levels were more likely to be diagnosed with asthma.

• Eat bell peppers, broccoli, Brussels sprouts, butternut squash, cantaloupe, grapefruit, kiwifruit, oranges, papayas, strawberries, sweet potatoes, and tomatoes.
• Grate lemon, orange, and grapefruit peel into stir-fries, bread and cake batter, salad dressings, and rice, or use marmalade.

Caffeine and theophylline found in coffee, tea, and dark chocolate work as well as or better than prescription inhaler drugs at opening bronchial tubes. Data from the Second National Health and Nutrition Examination Survey revealed that adults over 30 who drank coffee regularly had 29 percent fewer asthma symptoms.

• Drink two or three cups of coffee when feeling an asthma attack coming on if an inhaler is missing.
• Consume coffee, tea, caffeinated soda, cocoa, or dark chocolate in moderation to supplement pharmaceutical treatments.

Whole garlic provides a broad spectrum of natural antifungal chemicals that attack superficial fungi responsible for tinea pedis when applied topically or consumed. In a study of 47 soldiers with athlete's foot, those treated with garlic were entirely fungus free after 60 days.

• Place crushed, diced garlic in a basin with warm water and a little rubbing alcohol, then soak feet for up to 30 minutes.
• Crush garlic cloves, steep them in olive oil for 1 to 3 days, strain, and apply the oil to affected areas once or twice a day.
• Put crushed garlic in a pair of clean, dry socks and wear them while sleeping.

Common Physical Discomforts

Topical applications and dietary adjustments offer safe relief from localized pain and infections.

Topical application of tea tree oil solutions directly inhibits fungal growth and cures infections more effectively than placebos. Australian researchers gave 158 people with athlete's foot varying tea tree oil solutions for 4 weeks, resulting in a 64 percent cure rate for the 50 percent solution group.

• Dilute tea tree oil with an equal amount of water or vegetable oil.
• Apply directly to affected areas with a clean cloth or cotton band three times a day.

Capsaicin empties nerve endings of the chemical responsible for transmitting pain sensations, offering a natural and inexpensive alternative to commercial pain creams. Commercial topical creams containing 0.025 to 0.075 percent capsaicin are widely used to treat painful conditions like back pain.

• Apply commercial topical cream containing 0.025 to 0.075 percent capsaicin to the aching back three or four times a day.
• Alternatively, buy a chile pepper, mash it, and apply directly or mix it with a skin cream such as cold cream.
• Thoroughly wash hands after application to avoid contact with eyes, nose, or mouth.

Ginger provides proteolytic enzymes and anti-inflammatory compounds that target pain conditions without the severe side effects associated with pharmaceutical COX-2 inhibitors. Soccorro Guerrero brewed a traditional Amazonian salve made of ginger, honey, rum, and dragon's blood for pain relief.

• Steep three or four slices of fresh ginger in a cup of boiling water to make tea.
• Sprinkle 0.5 teaspoon of powdered ginger into foods or eat about an ounce of fresh ginger daily.

Beneficial probiotic organisms crowd out foul-smelling bacteria in the mouth and throat, decreasing oral malodor and plaque. When Japanese researchers gave study participants 3 ounces of unsweetened yogurt twice a day for 6 weeks, hydrogen sulfide levels decreased in over half of those with confirmed halitosis.

• Eat unsweetened plain yogurt with active cultures.
• Check labels to ensure they state active yogurt cultures or living yogurt cultures rather than being heat-treated after culturing.

Essential oils like cinnamaldehyde actively destroy stinky bacteria at the back of the tongue rather than merely masking underlying breath odors. A University of Chicago study found that chewing gum with cinnamaldehyde for 20 minutes reduced mouth bacteria by 50 percent.

• Chew gum containing the essential oil cinnamaldehyde for at least 20 minutes to reduce oral bacteria populations.

Active compounds in cranberry juice inhibit bacterial adhesion, making it difficult for pathogens to colonize the urinary tract and cause infections. In a University of Washington study, women who drank 8 ounces of cranberry juice cocktail experienced a significant reduction in bacteria adhesion to human bladder cells.

• Drink 8 ounces of cranberry juice as an optimal protective dose.
• Consume up to 17 ounces of cranberry juice daily as suggested by naturopaths to treat UTIs.

Sweat-munching bacteria thrive in alkaline environments, whereas acidic vinegar and antimicrobial chamomile neutralize this environment and suppress bacterial growth. Researchers at the University of California, Berkeley, and Rockefeller University demonstrated the complex physiological and genetic perceptions of human body odors.

• Put chamomile in a cloth bag and add it to bathwater or apply spent tea bags directly to armpits.
• Pour white distilled vinegar on a soft cloth and wipe underarms to neutralize alkalinity.

5. Targeting Chronic Conditions and Infections

Targeted nutritional changes and botanical compounds manage chronic diseases, pain syndromes, and persistent infections.

Infections and Respiratory Care

Americans experience an estimated 1 billion colds per year and 36,000 deaths from the flu annually. Chicken soup acts as an effective remedy for respiratory symptoms and cold prevention by reducing inflammation in the respiratory tract. Research demonstrates that chicken soup reduces the activity of neutrophils, which are white blood cells that defend against infection. Dr. Stephen Rennard and his researchers at the University of Nebraska Medical Center tested diluted variations of chicken soup on blood samples in the laboratory and observed the reduced movement of neutrophils.

Vitamin C intake reduces cold symptoms and duration, and helps prevent infections in individuals under extreme physical stress. A review of 21 studies using 1 to 8 grams of vitamin C daily found an average 23 percent reduction in cold symptoms. Studies on subarctic runners, skiers, and soldiers showed a 50 percent lower risk of catching a cold. Many experts recommend 1,000 milligrams of C daily.

Adjusting the ratio of dietary amino acids by increasing lysine and moderating arginine helps suppress herpes simplex virus replication and speeds recovery. High tissue levels of arginine help the herpes virus replicate, whereas lysine suppresses this replication. Pork loin chops provide 3.7 grams of lysine, and Swiss cheese offers an almost 3:1 ratio of lysine to arginine. Lima, small white, kidney, or black beans contain 1.4 grams of lysine in 100 grams. Winged beans supply 2.1 grams of lysine in 100 grams. A single broiled, boneless pork loin chop provides 3.7 grams of lysine. An ounce of Swiss cheese contains 73 milligrams of lysine and 26 milligrams of arginine.

Pain and Metabolic Support

Combining high-fiber foods with adequate water intake prevents and relieves chronic constipation by softening stools and promoting bowel motility. Over-the-counter laxatives cost the US $140 million annually, while 4 million Americans cope with chronic constipation. Italian researchers studied constipated groups and found that those who consumed 25 grams of fiber daily alongside 2 quarts of mineral water experienced better results than those who drank water only to their liking. You should drink 6 to 8 full glasses of water daily.

• Mix 0.5 cup applesauce, 0.5 cup unprocessed bran cereal, and 0.25 cup 100 percent prune juice together.
• Eat this mixture with your evening meal and repeat as needed.

Dark chocolate contains theobromine, which can help suppress coughs by inhibiting vagus nerve activity. Researchers at the National Heart and Lung Institute in London found that theobromine effectively stopped coughs in guinea pigs and raised the threshold for capsaicin-induced coughing in humans without side effects. Researchers gave study volunteers 1,000 milligrams of theobromine, whereas a 1.45-ounce Hershey's Special Dark chocolate bar contains 184 milligrams and 218 calories with 13 grams of fat. Up to 519 milligrams of theobromine are found in 1.76 ounces of dark chocolate.

Parents of 105 children asked to treat nighttime coughs found buckwheat honey to be more effective than a honey-flavored over-the-counter suppressant or no treatment. Honey effectively treats nighttime coughs in children due to its coating, antioxidant, and antimicrobial properties. You must never give honey to children under age 1 due to the risk of infant botulism.

6. Advanced Remedies for Major Systems

Whole food synergy protects cardiovascular health, joint mobility, prostate wellness, and immune function.

Cardiovascular and Digestive Care

Magnesium prevents and relieves migraines. Researchers assigned migraine patients to take either 600 milligrams of magnesium a day or a placebo for 12 weeks, leading to a 42 percent symptom reduction in the magnesium group and a 15.8 percent reduction for the placebo group.

• Eat 1 cup of cooked spinach for about 40 percent of the daily value.
• Consume a 3-ounce fillet of baked or broiled halibut for 23 percent.
• Use 1 cup of buckwheat flour for 75 percent.

Researchers at Odense University in Denmark used 0.33 teaspoon of fresh or powdered ginger a day to prevent migraines as effectively as standard drugs.

Researchers at Bowman Gray School of Medicine found that chocolate caused acid reflux for up to an hour, and high-fat meals increased the risk of acid reflux fourfold. A Swedish study found that people who regularly salted their food were 70 percent more likely to experience GERD.

• Eat slowly and chew food thoroughly instead of eating on the run.
• Avoid high-fat foods, fried items, chocolate, coffee, alcohol, onions, and excess salt.
• Try substituting onions with Maui, Texas sweet, or Walla Walla varieties if prone to heartburn.

In a Spanish study of 372 people at high risk for cardiovascular disease, LDL oxidation levels dropped significantly after 3 months for those following Mediterranean diets with olive oil or nuts. In a study of 81 people who had recent heart attacks, those receiving 4 grams of L-carnitine a day for 4 months had a 12-fold improvement in survival compared to a placebo group. A Dutch study of nearly 5,000 people found that drinking a cup and a half of tea daily cut the risk of heart attack in half compared to non-drinkers. Post-heart attack patients drinking 14 or more cups a week were 44 percent less likely to suffer mortality.

Joints, Bones, and Immunity

Prunes contain about 15 percent sorbitol and a dihydroxyphenyl isatin compound that stimulates intestinal contractions. An estimated 75 million Americans are affected by hemorrhoids.

• Gradually increase dietary fiber over the course of several weeks or months.
• Consume unpeeled apples, high-fiber beans, berries, ground flaxseed, and prunes.
• Drink eight full glasses of water daily alongside fiber intake.
• Apply cold, moistened conventional tea bags topically as a compress for soothing relief.

Researchers found that the equivalent of about four stalks of celery a day lowered blood pressure by 2 to 14 percent in rats and about 7 percent in humans. Human garlic studies showed average reductions of 7.7 mmHg in systolic and 5 mmHg in diastolic blood pressure.

• Munch on celery stalks or make celery seed tea by pouring boiling water over a teaspoon of seeds.
• Slice, mash, or mince garlic and wait 10 minutes before consuming to let allicin form.
• Consume one to two cloves of raw garlic daily or use standardized extracts.

10 Key Ideas

1. Whole plant foods provide complex phytochemicals that work synergistically to treat illness and match pharmaceutical efficacy.
2. Adopting a modified plant-rich diet avoids the dangers of processed foods and supplies necessary medicinal diversity.
3. Dr. Duke's top twelve healing food categories offer profound disease-fighting benefits and can be easily incorporated into the daily diet.
4. Buying local produce and understanding plant stress factors can maximize the intake of medicinal secondary metabolites and avoid pesticides.
5. Specific botanical remedies and kitchen foods relieve common conditions from altitude sickness to canker sores.
6. Topical applications and dietary adjustments offer safe relief from localized pain and infections.
7. Targeted nutritional changes and botanical compounds manage chronic diseases, pain syndromes, and persistent infections.
8. Whole food synergy protects cardiovascular health, joint mobility, prostate wellness, and immune function.
9. Whole food plant diets help suppress herpes virus replication and speed recovery by adjusting dietary amino acid ratios of lysine and arginine.
10. Whole food dietary modifications and botanical treatments effectively manage cardiovascular disease risks, blood pressure, and chronic joint pain.