What are antioxidants and where are they found?
Antioxidants: you hear the term everywhere. In food, supplements, skincare, superfoods and health blogs. But what exactly are antioxidants? What do antioxidants do in your body? And should you take extra supplements, or do you already get enough from your everyday diet?
The short answer: antioxidants is a collective term for substances that can react with free radicals. They occur in your body, but also in foods such as fruit, vegetables, coffee, tea, cocoa, nuts, seeds and whole grains. Some antioxidants are vitamins or minerals, such as vitamin C, vitamin E and selenium. Others are bioactive plant compounds, such as polyphenols and carotenoids.
Still, more isn't always better. Antioxidants from food fit well into a healthy lifestyle, but high doses from supplements aren't automatically a good idea. In this article, you'll learn what antioxidants are, which foods contain antioxidants and how to take a sensible approach to them.
What are antioxidants?
Antioxidants is a collective term for substances that can react with free radicals. Free radicals are reactive particles that are produced during normal processes in your body, such as energy production, exercise and immune responses. They can also increase due to external factors such as air pollution, smoking, UV radiation, alcohol and prolonged stress.
Free radicals aren't just bad. Your body also uses them, for example, in immune responses and cellular signaling processes. They become a concern only when there are too many free radicals relative to your body's antioxidant capacity. This is called oxidative stress.
Antioxidants play a role in this balance. They can neutralize free radicals, often together with other antioxidant systems in your body.
Examples of antioxidants include:
- Vitamin C
- Vitamin E
- Selenium
- Zinc
- Carotenoids, such as beta-carotene and lycopene
- Polyphenols, such as flavonoids in tea, cocoa and berries
- Glutathione, a substance produced by the body
Vitamin C, vitamin E, selenium and zinc are vitamins and minerals that your body uses for many other processes. Carotenoids and polyphenols are plant compounds.
What do antioxidants do?
The question of what antioxidants do mainly revolves around oxidative stress. When free radicals are present in excessive amounts, they can react with fats, proteins and DNA in cells. This process is studied scientifically in relation to natural aging processes and overall vitality.
That doesn’t mean antioxidants from food are a miracle cure. It does mean that a diet rich in vegetables, fruit, legumes, nuts, seeds, whole grains, coffee, and tea is often rich in these compounds.
So the best way to think about it isn’t that antioxidants are soldiers that solve everything. A better comparison is that antioxidants are one part of a broader system in the body. Sleep, exercise, a healthy diet, enough protein, water, and rest are just as important.
Antioxidant-rich foods: where are antioxidants found?
Eating antioxidant-rich foods doesn’t have to be complicated or expensive. Antioxidants are found in many everyday foods. Variety is what matters most. Rather than relying on one superfood, a varied diet provides the widest range of antioxidants.
1. Berries and red fruit
Berries, blackberries, raspberries, strawberries, and blueberries contain vitamin C, polyphenols, and anthocyanins, among other compounds. Anthocyanins are pigments that give berries their purple, red, or blue color and are widely researched.
For example, add berries to yogurt, oatmeal, or smoothies, or use them as a topping for a breakfast bowl.
2. Coffee and tea
Coffee and tea are important sources of polyphenols in many Western diets. Green tea contains catechins, and black tea contains theaflavins, among other compounds. Coffee contains chlorogenic acids, a group of polyphenols that is widely studied.
That doesn’t mean you should drink unlimited amounts of coffee. Caffeine sensitivity varies from person to person. But coffee and tea can certainly be part of a mindful lifestyle, as long as you don’t use them as a substitute for sleep or water.
3. Cocoa and dark chocolate
Cocoa contains flavanols, a group of polyphenols. The higher the cocoa percentage and the lower the amount of added sugar, the better the product usually is as part of a healthy diet.
You can add pure cocoa to oatmeal, smoothies, or hot drinks. When choosing chocolate, opt for dark varieties and treat it as an extra, not a staple food.
4. Tomatoes
Tomatoes contain lycopene, a carotenoid that gives them their red color. Interestingly, lycopene from heated tomato products, such as tomato sauce or tomato paste, may often be more bioavailable than lycopene from raw tomatoes. Pair tomatoes with a little fat, such as olive oil, because carotenoids are fat-soluble.
5. Green leafy vegetables
Spinach, kale, arugula, and other leafy greens contain various antioxidants, vitamins, and minerals. They provide, among other things, vitamin C, carotenoids, and folate.
Leafy greens are easy to add to salads, smoothies, soups, omelets, and hot meals.
6. Whole grains, nuts, and seeds
Whole-grain foods contain more nutrients than refined grain products. Examples include whole-grain bread, oatmeal, buckwheat, barley, and brown rice. Nuts and seeds also provide vitamin E, selenium, zinc, and polyphenols.
7. Herbs, spices, and plant-based supplements
Herbs and spices such as turmeric, cinnamon, ginger, and cloves contain bioactive plant compounds. Botanicals such as ashwagandha are also being studied for their various traditional uses. For our ashwagandha powder, we use these claims: Ashwagandha helps the body cope with stress* and Ashwagandha helps maintain mental balance*.
Want to explore natural products for a mindful routine? Browse the GOYU shop. For botanicals, you could look at ashwagandha powder. Products such as apple cider vinegar capsules are also often used as part of a mindful lifestyle. Just think of them as a supplement to a healthy foundation.
*Health claim pending approval by the European Commission.
Should you take antioxidant supplements?
In many cases, it is wise to get antioxidants primarily from food. Food provides not just one isolated substance, but a combination of fiber, vitamins, minerals, and plant compounds. This combination is precisely what makes a varied diet different from taking a single substance.
High doses of antioxidant supplements are not automatically better. In fact, there are indications that high doses of beta-carotene may carry risks for certain groups, such as smokers. Large studies and analyses have shown that supplements do not always have the same effects as antioxidant-rich foods.
That doesn't mean every supplement is unnecessary. Sometimes supplementation may be beneficial, for example in the case of a specific deficiency or increased need. But taking extra antioxidants without a clear reason is not necessarily necessary. Consult a qualified professional if you are unsure, especially if you take medication, are pregnant, or have specific medical circumstances.
Conclusion
Antioxidants are substances that can react with free radicals and are widely studied in relation to oxidative stress. They occur in your body and in foods such as berries, vegetables, coffee, tea, cacao, tomatoes, whole grains, nuts and seeds.
The key takeaway is simple: focus on antioxidants from food instead of relying solely on high doses of individual supplements. A varied diet provides different types of antioxidants, along with fiber and other nutrients. This is a better fit for a sustainable lifestyle than relying on a single isolated product as a quick fix.
If you want to be more mindful about antioxidants, start with your plate: more color, more variety, and above all, foods you can easily keep eating every day.
FAQ
What are antioxidants?
Antioxidants are substances that can react with free radicals. They are widely studied in relation to oxidative stress.
What do antioxidants do?
Antioxidants are part of the balance between free radicals and your body's antioxidant systems. The precise role a substance plays varies from one substance to another.
Where are antioxidants found?
Antioxidants are found in foods such as berries, vegetables, green tea, black tea, coffee, cacao, tomatoes, whole grains, nuts, seeds, herbs and spices.
Are antioxidant supplements necessary?
Usually not if you eat a varied diet. High doses of antioxidant supplements are not automatically better and may be unfavorable in some situations. Consult a qualified professional if you are unsure.
References
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Free radicals, antioxidants and functional foods: Impact on human health
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Pham-Huy et al. (2008), review on free radicals and antioxidants
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CARET study on beta-carotene and vitamin A (Omenn et al., 1996)
Disclaimer: This article is intended for informational purposes only. Dietary advice and the use of dietary supplements are not a substitute for medical advice. If you have health concerns or are unsure, always consult a doctor or qualified professional.
