Eat the Rainbow, Even When the Stores Are Empty
By Larry Betz | Prepared Not Paranoid https://www.preparednotparanoid.com/
When a storm is coming, watch what disappears from the grocery store first. Bread, milk, water, and the produce section. When the power goes out, fresh fruit and vegetables are usually the first thing families lose, and the last thing they think to stock.
That matters more than most people realize.
When most people think about nutrition, they think about calories, protein, carbs, fat, vitamins, and minerals. But plants carry another layer of protection that never shows up on a Nutrition Facts panel: phytonutrients. They give a blueberry its deep blue, a tomato its red, and garlic its bite. They help protect the plant, and when you eat them, research shows they help protect you too.
You don't need to memorize chemical names to get the benefits. You only need one habit: eat a wide variety of colors every day. And yes, you can do it from your pantry and freezer in an emergency, not just from a farmers market in summer.
What Are Phytonutrients?
Phytonutrients, also known as phytochemicals, are naturally occurring compounds found in plants. ("Phyto" comes from the Greek word for plant.) Unlike vitamins and minerals, phytonutrients are not essential for basic human survival, but they play a significant role in maintaining optimal health and preventing disease. These compounds are responsible for the vibrant colors, flavors, and aromas of fruits and vegetables. There are thousands of phytonutrients, each with unique properties and health benefits.
You'll hear a few family names over and over:
Carotenoids (beta-carotene, lycopene, lutein): orange, red, yellow, and green foods
Flavonoids and other polyphenols: berries, onions, apples, tea, coffee, and cocoa
Glucosinolates: cruciferous vegetables like broccoli and cabbage
Allium compounds (like allicin): garlic, onions, and leeks
Why We Need Phytonutrients
Antioxidant protection. Phytonutrients are crucial for their antioxidant properties, which help protect the body from oxidative stress caused by free radicals. Free radicals are unstable molecules that can damage cells, and that damage is linked to chronic diseases such as cancer, heart disease, and neurodegenerative disorders. By helping neutralize free radicals, phytonutrients may lower the risk of these diseases and promote overall health.
Calming inflammation. Additionally, phytonutrients have anti-inflammatory properties. Chronic inflammation plays a role in many health issues, including arthritis, diabetes, and cardiovascular diseases. Consuming a diet rich in phytonutrients can help manage and reduce inflammation in the body.
Immune support. Phytonutrients also support the immune system. Certain phytonutrients, such as flavonoids and carotenoids, have been shown to support immune function, which helps the body fight off infections and illnesses more effectively.
Cancer protection. Furthermore, some phytonutrients, like glucosinolates found in cruciferous vegetables, have been linked to lower cancer risk. In lab and animal research, these compounds stimulate the body's detoxification enzymes, slow cancer cell growth, and help the body clear carcinogens. Human studies are more mixed, but people who eat more vegetables and fruits consistently tend to have a lower risk of several chronic diseases.
Food beats pills. Large studies of antioxidant supplements, like high-dose beta-carotene or vitamin E pills, have generally not shown the same benefits as eating antioxidant-rich foods, and a few showed harm, such as a higher lung cancer risk from beta-carotene pills in smokers. The benefits seem to come from the whole food, with its fiber and thousands of compounds working together. Eat the rainbow. Don't swallow it in a capsule.
Eat the Rainbow: What Each Color Brings
Different colors usually mean different phytonutrients, so the more colors you eat, the more ground you cover.
Make it a family game. Ask your kids to count the colors on their plate at dinner. Kids who help choose and wash the produce are more likely to eat it.
Best Sources of Phytonutrients
To reap the benefits of phytonutrients, it's essential to consume a varied diet rich in fruits, vegetables, whole grains, nuts, seeds, and legumes. Here are some of the best sources of phytonutrients:
Fruits and Vegetables: Brightly colored fruits and vegetables are some of the richest sources of phytonutrients. Berries (such as blueberries, strawberries, and raspberries), citrus fruits (like oranges and grapefruits), and dark leafy greens (such as spinach and kale) are particularly high in these beneficial compounds.
Two medication cautions: grapefruit can interact with some medications, including certain cholesterol drugs (statins) and blood pressure medicines. Dark leafy greens are high in vitamin K, which affects how blood thinners like warfarin work. You don't have to avoid greens on warfarin, but keep your intake steady and talk to your doctor.
Cruciferous Vegetables: Vegetables like broccoli, Brussels sprouts, cabbage, and cauliflower are rich in glucosinolates. Chop, then wait: chopping broccoli or cabbage and letting it sit a few minutes before cooking helps the protective compounds form, and light steaming keeps more of them than boiling.
Nuts and Seeds: Almonds, walnuts, flaxseeds, and chia seeds are excellent sources of phytonutrients.
Whole Grains: Whole grains like quinoa, brown rice, and oats contain phytonutrients that contribute to better digestion, heart health, and blood sugar control. Much of that value is in the outer layers, which refined grains lose.
Herbs and Spices: Many herbs and spices, such as turmeric, ginger, garlic, and oregano are loaded with phytonutrients that offer powerful anti-inflammatory and antioxidant benefits. However, it's important to note that herbs and spices can often be contaminated with pesticides, heavy metals, or even mold, especially when imported from bulk suppliers with low oversight.
This isn't theoretical. In 2024, the FDA issued public alerts about elevated lead in certain ground cinnamon products sold at discount stores, after cinnamon applesauce pouches were recalled in 2023 for lead poisoning in children.
For this reason, it's highly recommended to buy organic from a reputable source whose growing and processing practices you trust. Even better, homegrown herbs are easy to cultivate, offer a longer shelf life, and can be dried or frozen for year-round use, ensuring both quality and freshness.
Tea and Coffee: Both tea (especially green tea) and coffee are rich in polyphenols, a type of phytonutrient that provides powerful antioxidant effects. However, it's important to be selective about your source. Conventionally grown coffee can be treated with pesticides, and coffee can also be contaminated with mold toxins (mycotoxins), which may contribute to inflammation or other health issues over time. Whenever possible, choose organic, mold-tested, and sustainably sourced coffee and tea to maximize their health benefits without unwanted toxins. When a brand says "mold-free" or "mycotoxin tested," treat it as a company claim unless it shows independent lab results.
Incorporating a wide variety of these foods into your daily diet can help ensure you get an ample supply of phytonutrients. Aim to include a rainbow of colors in your meals to maximize your intake of different types of phytonutrients and their unique health benefits. By doing so, you can enhance your overall well-being and reduce the risk of chronic diseases.
Getting More From Every Plant
A few simple kitchen habits help you get more out of the food you already buy.
The Rainbow in Your Emergency Pantry
Fresh produce is often the first thing families lose in an emergency. Plan ahead so your family still gets color when the stores are empty or the power is out. Frozen, canned, dried, and freeze-dried foods all count.
Keep it rotating. New cans and bags go to the back, older ones move to the front, and you eat from the front.
Ask Yourself
How many colors did my family eat yesterday?
Where do my herbs, spices, and coffee come from, and do I trust that source?
If fresh produce disappeared for two weeks, could my pantry and freezer still give us a rainbow?
Remember
Fill your plate with color. Choose clean sources, and keep the rainbow stocked in your pantry and freezer, so your family is covered on ordinary days and hard ones.
Get Started Today
[FREE DOWNLOAD: TO BE CHOSEN AFTER THE BINDER REVIEW]
Go Deeper
The Prepared Not Paranoid Family Nutrition Guide. This post shows you why color matters. The guide shows you how to keep it on your family's table every day: a full chapter on fiber and gut health, how to build a plate for every age in your family, a shelf-life chart for your pantry, a chapter on medications and food in an emergency, and 15 shelf-stable recipes that taste like real meals. [Get it here: LINK]
Tools I recommend: The food storage containers, herb planters, and kitchen tools I recommend are in my Amazon store. https://amzn.to/4yM747h
Related reading:
Nutrition Basics, Part 1: Macronutrients and Micronutrients https://www.preparednotparanoid.com/pnp-library/nutrition-lesson-1
Nutrition Basics, Part 5: Omega-3, 6, and 9 [LINK: new post]
Nutrition Basics, Part 16: Shop for Emergencies the Smart Way https://www.preparednotparanoid.com/pnp-library/nutrition-lesson-10
Toxic Chemicals to Avoid: Introduction https://www.preparednotparanoid.com/pnp-library/toxic-chemicals-intro
References
Liu RH. Health-promoting components of fruits and vegetables in the diet. Advances in Nutrition 4(3):384S to 392S, 2013.
Linus Pauling Institute, Oregon State University. Micronutrient Information Center: Phytochemicals. https://lpi.oregonstate.edu/mic/dietary-factors/phytochemicals
National Center for Complementary and Integrative Health (NIH). Antioxidant Supplements: What You Need to Know. https://www.nccih.nih.gov/health/antioxidant-supplements-what-you-need-to-know
National Cancer Institute. Cruciferous Vegetables and Cancer Prevention. https://www.cancer.gov/about-cancer/causes-prevention/risk/diet/cruciferous-vegetables-fact-sheet
U.S. Food and Drug Administration. Alerts on elevated lead levels in ground cinnamon (2024) and the investigation of lead in cinnamon applesauce pouches (2023 to 2024).
European Food Safety Authority. Risk assessment of ochratoxin A in food. EFSA Journal, 2020.
U.S. Food and Drug Administration. Grapefruit Juice and Some Drugs Don't Mix. https://www.fda.gov/consumers/consumer-updates/grapefruit-juice-and-some-drugs-dont-mix
National Institutes of Health, Office of Dietary Supplements. Vitamin K Fact Sheet. https://ods.od.nih.gov/factsheets/VitaminK-Consumer/
Dewanto V, et al. Thermal processing enhances the nutritional value of tomatoes by increasing total antioxidant activity. Journal of Agricultural and Food Chemistry 50(10):3010 to 3014, 2002.
Disclaimer
This article is for general informational and educational purposes only. It is not medical advice and is not a substitute for guidance from your physician or a registered dietitian. If you take blood thinners, statins, blood pressure medication, or any medication with a grapefruit warning, talk to your doctor or pharmacist about these foods. Affiliate disclosure: I've linked to products from my Amazon store that I personally recommend. As an Amazon Associate, I earn from qualifying purchases, at no extra cost to you. Thank you for supporting my work.
In a medical emergency, call 911.
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