Polyphenols are a class of chemicals found naturally in plants, including fruits, veggies, herbs and spices, teas, cocoa, and even wine.
These chemicals are designed to protect plants from threats, like UV radiation and insects. Not surprisingly, they help protect your health as well. This is mainly due to their antioxidant and anti-inflammatory power.
Can an apple a day really keep the doctor away? How about red wine and chocolate? They might! All three contain compounds called polyphenols — plant compounds with very strong antioxidant properties that are quite beneficial to your health.
So pour that glass of wine and chop up an apple, here’s what polyphenol foods can do for you.
There are hundreds of foods that contain polyphenols in some form. Here are some simple foods to add to your plate to get some polyphenol goodness.
If foods could wear accessories, blueberries would wear a crown. Berries in general are loaded with 200 to 220 mg of hydroxycinnamic acids and 500 mg of anthocyanins (both are types of polyphenols) per 100 grams.
The polyphenols in blueberries can help protect your nervous system from damage. And, they may enhance cognitive functioning and help prevent cardiovascular disease by way of their antioxidant and anti-inflammatory properties.
Both are great for heart health and reducing LDL cholesterol (the “bad” kind) and triglyceride levels (also bad at high levels). EGCG in particular may help you feel more calm, less fatigued, and even help prevent cancer cell growth and Alzheimer’s disease.
Beans are a great source of polyphenols. A 200 mg serving contains about 70 to 110 mg of monomeric polyphenols. In addition to being a rich source of nutrients like protein and fiber, they’re packed with antioxidants and may help keep blood sugar levels under control.
Soybeans are full of isoflavones, a type of flavonoid. A 200 mg serving of soybeans contains about 40 to 180 mg of polyphenols. They’re the compounds that give soy its antioxidant muscle, scavenging free radicals and reducing inflammation (you go, soybeans).
The Dietary Guidelines for Americans suggests two drinks or less in a day for men and one drink or less in a day for women. Some research shows that moderate alcohol consumption may help protect against coronary disease and stroke. A 100 mL serving (under half a cup) contains about 20 to 35 mg of polyphenols.
Resveratrol may also be beneficial in the prevention of blood clots by making platelets less likely to stick together and form a clot. Plus, studies show resveratrol can improve HbA1c, a measure of how well-managed blood sugar has been over a period of time.
Note that human studies have been pretty inconsistent with some studies showing improvements while others showed minimal effects. More research is needed to really be sure.
Unlike regular olive oil, EVOO is made of cold-pressed olives (not a mix with processed oils) that helps you reap its natural benefits.
Virgin olive oil contains about 50 to 1000 mg of polyphenols per kilogram.
Spinach is packed with powerful antioxidants like vitamins A and C, fiber, and even some protein.
Ellagitannins have been studied for their potential role to reduce the risk of certain diseases including cancer, cardiovascular diseases, and neurodegenerative diseases.
Walnuts have very high concentrations of polyphenols, with about 1,591 mg per 100 gram serving.
And, it’s particularly beneficial for your ticker by helping to prevent heart disease, high cholesterol, and high blood pressure.
Studies have shown cinnamon also helps to reduce blood sugar levels in patients with type 2 diabetes.
Foods rich in polyphenols are safe to eat for most people (unless you have an existing allergy or intolerance). Supplements are available that provide polyphenols, but they are a whole different ball game.
Some supplement brands recommend doses 100 times higher than what is typically consumed through foods.
Risks associated with high-dose polyphenol supplements include:
- damage to the liver and kidneys
- inhibiting thyroid function
- acting as anti-nutrients (blocking absorption of important nutrients we need)
- potential medication interactions
- potential carcinogenic effects
Foods rich in polyphenols are fantastic for health and should be included as part of a balanced, healthy diet. The best way to reap the rewards of these nutrition gems is through whole foods, hands down.
There’s no scientific consensus around appropriate dosing for these compounds as of yet, so supplements should be considered with caution.
The supplement industry remains unregulated, and some products may provide excessive amounts of polyphenols, potentially causing harm.
If you’re thinking about trying a polyphenol supplement, be sure to speak with your healthcare provider or pharmacist first.