Like blueberries, blackberries contain vitamins C and K as well as manganese, along with B vitamins. Their antioxidant compounds may help to reduce inflammation and aging of the arteries, thereby providing protection from heart disease, cancer, inflammation, neurological diseases and other chronic conditions.
3. Acai Berry
Low in sugar but high in calcium, fiber, fatty acids and vitamin A, acai is considered a superfruit and has the highest Oxygen Radical Absorbance Capacity (ORAC), which measures a food's antioxidant power.
The antioxidants in acai berries may prevent certain health issues such as arthritis, inflammation, obesity, neurological diseases and inflammation. Furthermore, these powerful berries contain anthocyanin compounds, including resveratrol — even more than red wine — which gives acai its rich color and also helps protect against free radicals.
It's also high in antioxidants, including lycopene, carotenoids and cucurbitacin E. Lycopene, in addition to protecting against cancers of the digestive system, also works to reduce cholesterol and blood pressure, improving heart health.
Just one cup of carrots provides a whopping 428 percent of the daily RDA. Beta carotene, an antioxidant, is responsible for that bright orange color and may protect against certain cancers, particularly prostate and lung cancers. The body converts beta carotene to a form of vitamin A called retinal, an important molecule for maintaining normal vision.
7. Sweet Potatoes
Sweet potatoes are an excellent source of potassium and fiber as well as carotenoids, the plant pigments behind the red, yellow and orange hues in some fruits and vegetables. Carotenoids provide antioxidant and immune system benefits and may protect against cardiovascular disease. Additionally, some carotenoids are converted in the body to vitamin A in the form of retinal.
Containing vitamins C and K, folate, manganese and potassium, broccoli is in the cruciferous vegetable family (and it's one of the healthiest vegetables). It's rich in the plant compound glucosinolate, as well as sulforaphane, a glucosinolate byproduct that may provide anti-cancer benefits. Sulforaphane has been shown to cause apoptosis (cell death) in colon, prostate, breast and lung cancer cells.
Additionally, sulforaphane may be helpful as a weight-management aid. In a 2017 study in the journal Diabetes, researchers compared mice fed with high-fat food alongside those fed high-fat food supplemented with sulforaphane. The latter group of mice gained weight at a rate 15 percent lower than that of the mice fed without sulforaphane.
What makes kale one of the healthiest vegetables? Among the cruciferous family, kale is filled with vitamins A, C and K as well as folate, potassium, magnesium, calcium, iron, and fiber.
It's one of the most nutrient-dense vegetables you can eat, but it's also low in calories. Like other leafy greens, kale has antioxidant compounds such as beta carotene, flavonoids and polyphenols that offer anti-inflammatory, anti-viral, anti-depressant and heart-protective effects and may lower blood pressure.
Although you might not consider garlic to be a vegetable, given its herb-like ability to add flavor to many dishes, it's actually more vegetable-like because it grows underground, like onions and shallots.
Not only is garlic a versatile cooking staple, but it's also beneficial for heart health and blood sugar regulation. It contains allicin, a plant compound that may inhibit the growth of human mammary endometrial and colon cancer cells. Moreover, garlic has historically been used medicinally for preventive and curative remedies, with roots tracing back to ancient China and Egypt.
Tips to Boost Fruit and Vegetable Intake
There are many simple ways to increase your consumption of fruits and vegetables. Here are just a few:
- Start by replacing sugary and processed snacks with chopped fruits and vegetables, and make them easily accessible.
- Keep them on-hand in the refrigerator, pack them in to-go pouches, and add a fruit or vegetable to every meal or snack.
- Stock up on a variety of produce every time you hit the grocery store, and experiment with creating vegetable-based meals such as soups and salads.
Little by little, you'll crowd out unnecessary foods with little nutritional value in favor of the healthiest fruits and vegetables.
- CDC: The CDC Guide to Strategies to Increase the Consumption of Fruits and Vegetables
- Harvard School of Public Health: The Nutrition Source
- Live Science: What Are Carotenoids?
- Mercola: What Is Acai Good For?
- Pathology & Oncology Research: Blueberry as a Potential Radiosensitizer for Treating Cervical Cancer
- Healthline: The 20 Healthiest Fruits on the Planet
- Medical News Today: How blueberries help to kill cancer cells
- Mercola: What Are Blackberries Good For?
- Center for Science in the Public Interest: 10 Best Foods
- Science Daily: Sulforaphane, a phytochemical in broccoli sprouts, ameliorates obesity
- Berkeley Wellness: Do Carrots Really Improve Eyesight?
- National Center for Biotechnology Information: Garlic: a review of potential therapeutic effects
- National Center for Biotechnology Information: Extracts from the history and medical properties of garlic
- Healthline: 10 Health Benefits of Kale
- Healthline: The 14 Healthiest Vegetables on Earth
- Organic Facts: Is Garlic A Vegetable Or An Herb
- Mercola: The Health Benefits of Fiber
- Diabetes: Glucoraphanin Ameliorates Obesity and Insulin Resistance Through Adipose Tissue Browning and Reduction of Metabolic Endotoxemia in Mice