Book cover of How Not to Die by Michael Greger

Michael Greger

How Not to Die

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“What we eat determines how long and how well we live.” Could changing your diet save your life?

1. Poor Diet: The Leading Cause of Early Death

A poor diet is the leading factor behind chronic diseases and premature death. Today, many people live longer lives, but they often suffer from diseases like heart problems, diabetes, or cancer. This stems largely from food choices dominated by processed foods and animal products like meat, eggs, and dairy. These foods contribute to high cholesterol, clogged arteries, and other health risks.

Even cultural shifts in diet show the impacts of poor nutrition. When Japanese individuals adopted a typical American diet, their risk of heart disease at a younger age shot up significantly compared to their counterparts in Japan. Yet, the connection between diet and health is frequently ignored in medical practices. Physicians are typically trained to prescribe medications instead of focusing on nutritional education.

Medical institutions have even opposed efforts to integrate nutritional studies into their training. For instance, a California bill in 2001 pushing for nutritional training for doctors was met with resistance. Instead, the focus often remains on pharmaceuticals, with 70% of Americans taking at least one prescription drug regularly.

Examples

  • The Permanente Journal study confirmed diets rich in meat and processed foods elevate risks for chronic diseases.
  • Japanese-Americans adopting an American diet showed greater heart disease risks at younger ages.
  • California’s medical board opposed adding nutritional training to doctors’ education requirements but mandated training in pain management.

2. Plants Can Heal What Medicine Cannot

Switching to a plant-based diet not only prevents disease but can reverse it. Cultures that embrace a plant-heavy diet—such as some rural Chinese populations—experience far fewer cases of heart disease than societies consuming meat-heavy diets. Studies confirm the healing effects of plants on chronic issues.

For instance, individuals with advanced heart disease saw tremendous recovery when put on a near-vegan, plant-centric diet. Plaque buildups in their arteries dissolved naturally over time. Similarly, smokers who quit for 15 years eventually achieved lung health similar to non-smokers.

While over-relying on medication introduces risks, such as diabetes from certain drugs, plants offer safe alternatives. Lipitor, a widely prescribed cholesterol-lowering drug, carries risks of liver and muscular damage. Yet a plant-based menu offers the same health benefits without such side effects.

Examples

  • The rural Chinese, with low meat consumption, show extraordinarily low heart disease rates.
  • Smokers rebuilding lung health after quitting proves the body’s healing capacity with proper conditions.
  • Heart patients reversing artery damage by switching to a plant-based diet.

3. Berries: Small But Mighty

Fruits—specifically berries—hold incredible benefits for health. Daily servings of fruit improve lung health, lower the risk of type-2 diabetes, and combat chronic inflammation. Unlike sugary fruit juices, whole fruits provide a balance of fiber and antioxidants, which regulate blood sugar naturally.

Berries stand out for their anti-cancer properties. Research showed that black raspberries reduced hereditary colon polyps by half within nine months of regular consumption. They also protect the brain and liver from degenerative diseases.

What makes berries so special are their rich antioxidants, ten times higher than those in apples or bananas. Their pigmentation contains these disease-fighting compounds, making them an ideal addition to daily meals.

Examples

  • Harvard studies linked whole fruits to reductions in type-2 diabetes risks versus fruit juice.
  • Black raspberry intake halved colon polyp growth in high-risk patients over a nine-month study.
  • A cup of blackberries contains 650 antioxidant units, far outshining most other fruits.

4. Vegetables Are DNA’s Best Friend

Vegetables do more than stay the spotlight food your parents encouraged you to eat. Leafy greens, cruciferous veggies, and other vegetables help protect DNA by keeping telomeres intact, slowing cellular aging. These greens also combat inflammation and reduce risks of cancers like lymphoma and prostate cancer.

For example, broccoli significantly aids liver detoxification and combats DNA mutations caused by smoking. In one study, smokers who consumed large portions of broccoli showed a 41% reduction in DNA damage within ten days.

Cooking methods matter, however. Heat destroys certain enzymes in vegetables that activate anti-cancer molecules. For instance, chopping broccoli triggers a reaction that protects its nutrients, allowing you to cook it after a short wait without losing its power.

Examples

  • Leafy greens preserve telomeres, slowing cellular aging to prevent disease.
  • Broccoli intake led to 41% fewer DNA mutations in studied smokers.
  • Cruciferous vegetables produce sulforaphane, a cancer-fighting molecule activated through correct preparation.

5. Beans and Whole Grains: Unsung Heroes

Beans and whole grains are often overlooked but are powerhouses of nutrition. Beans provide fiber-rich, plant-based protein, whereas whole grains deter diseases such as diabetes and obesity. Together, they form the foundation for a longer, healthier life.

Lentils, for example, regulate sugar levels even hours after meals, preventing unexpected spikes. Meanwhile, research shows that whole grains, whatever the type, lower mortality risk by combating diseases like heart disease and cancer.

The simple rule? Add color to your grains. Brightly-colored options pack antioxidants, making them both tasty and healthy. Even unexpected options, like air-popped popcorn, qualify as healthy whole grains!

Examples

  • Lentils prevent sugar spikes after eating by slowing sugar absorption.
  • Grains high in color contain more antioxidants and health benefits.
  • A 2015 analysis confirmed whole-grain consumers live longer, regardless of other habits.

6. The Power of Nuts and Seeds

Nuts and seeds hold life-extending benefits, protecting against diseases like cancer and even lowering cholesterol levels faster than drugs. Brazil nuts, for instance, show immediate results by slashing cholesterol in as little as 24 hours.

Their phytates positively impact bone strength and detoxify iron buildup, a risk factor for certain cancers. On top of that, adding these to your diet doesn’t cause weight gain despite their calorie count—because the body absorbs some of the fat poorly while burning even more.

Pair nuts and seeds with meals creatively to take full advantage. Tahini, made from sesame seeds, is an easy addition to salad dressings or sauces. Meanwhile, walnuts reign supreme for omega-3 levels and antioxidizing potential.

Examples

  • A single serving of brazil nuts lowers cholesterol immediately, as shown in studies.
  • Phytates in seeds detox excess iron linked to certain cancers.
  • Sesame and sunflower seeds make rich bases for tastier, healthier salads.

7. Herbs and Spices: Tiny Powerhouses

Herbs and spices amplify disease-fighting properties in any meal. Packed with the highest antioxidants per gram, flavorsome ingredients like oregano and cinnamon transform the health impact of an otherwise ordinary meal.

The standout, turmeric, carries powerful anti-cancer properties, especially for colon and pancreatic cancers. Adding just a quarter teaspoon of turmeric daily strengthens its benefit while pairing it with black pepper enhances its absorption in the body.

Spices like saffron have also shown strong mood-enhancing effects. Studies with Alzheimer’s patients show cognitive improvements when saffron is added to their diet over placebos.

Examples

  • Adding oregano to marinara sauce doubles its antioxidant content.
  • Turmeric intake curbs colon and lung cancer rates based on numerous studies.
  • Alzheimer participants improved cognition with saffron extract.

8. Water Beats All Beverages

The simplest and healthiest beverage is water. Hydration directly impacts brain function, physical health, and even mood. Five glasses of liquids a day—mainly water—support optimal health.

Beyond water, unsweetened coffee and tea also pack benefits. Coffee reduces risks for liver diseases and some mental health struggles, while teas like hibiscus also help lower blood pressure naturally.

What to avoid? Almost every other common drink, like soda, milk, and alcohol. Excessive sugar, cancer risks, and calorie counts from these beverages outweigh their minimal benefits.

Examples

  • Research shows daily water consumption improves overall organ function.
  • Hibiscus tea lowered blood pressure among prehypertensive patients in one study.
  • Milk and soda ranked poorly in studies for health metrics.

9. Pair Exercise with Healthy Eating

A balanced diet can save you, but it works best when paired with physical activity. Studies reveal that sedentary lifestyles—spanning over six hours of sitting daily—increase premature death risks even if you exercise sporadically.

By moving for at least an hour or taking up interval activities like tennis or hiking, you amplify health gains. Exercise boosts metabolism, strengthens immunity, and cuts risks of obesity that often stem from daily sedentary behaviors.

Combining food with movement forms an unbeatable strategy for staying healthy. As research shows, small daily changes in physical activity shave percentage points off your mortality risk.

Examples

  • Sedentary individuals face up to 20% greater mortality risks even with occasional exercise.
  • Walking daily for an hour cuts overall mortality risks by 24%.
  • Recommendations suggest 90 minutes of moderate or 40 minutes of vigorous exercise each day.

Takeaways

  1. Add variety to your meals by including nuts, seeds, berries, and whole grains daily.
  2. Drink water throughout the day and incorporate natural beverages like tea and plain coffee.
  3. Aim to move your body consistently—try fast walking, hiking, or other forms of moderate exercise for an hour daily.

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