Tomatoes: Health Benefits, Facts, Research
Whether you refer to a tomato as a fruit or a vegetable, there is no doubt that a tomato is a nutrient-dense, super-food that most people should be eating more of.
The tomato has been referred to as a “functional food,” a food that goes beyond providing just basic nutrition, additionally preventing chronic disease and delivering other health benefits, due to beneficial phytochemicals such as lycopene.
Despite the popularity of the tomato, only 200 years ago it was thought to be poisonous in the U.S., likely because the plant belongs to the nightshade family, of which some species are truly poisonous.
Possible health benefits of tomatoes
High fruit and vegetable intake is also associated with healthy skin and hair, increased energy and lower weight. Increasing consumption of fruits and vegetables significantly decreases the risk of obesity and overall mortality.
As an excellent source of the strong antioxidant vitamin C and other antioxidants, tomatoes can help combat the formation of free radicals known to cause cancer.
2) Prostate Cancer
Lycopene has been linked with prostate cancer prevention in several studies.7 According to John Erdman, Ph.D., Professor Emeritus of the department of food science and human nutrition at the University of Illinois, “There’s very good, strong, epidemiological support for increased consumption of tomato products and lower incidence of prostate cancer.”7
3) Colorectal Cancer
Beta-carotene consumption has been shown to have an inverse association with the development of colon cancer in the Japanese population. High fiber intakes from fruits and vegetables are associated with a lowered risk of colorectal cancer.
According to the American Cancer Society, some studies have shown that people who have diets rich in tomatoes may have a lower risk of certain types of cancer, especially cancers of the prostate, lung, and stomach. Further human-based research is needed to find out what role lycopene might play in the prevention or treatment of cancer.
4) Blood pressure
Maintaining a low sodium intake is essential to lowering blood pressure, however increasing potassium intake may be just as important because of its vasodilation effects. According to the National Health and Nutrition Examination Survey, fewer than 2 percent of U.S. adults meet the daily 4700 mg recommendation.3
Also of note, a high potassium intake is associated with a 20 percent decreased risk of dying from all causes.3
5) Heart health
The fiber, potassium, vitamin C and choline content in tomatoes all support heart health. An increase in potassium intake along with a decrease in sodium intake is the most important dietary change that a person can make to reduce their risk of cardiovascular disease, according to Mark Houston, M.D., M.S., an associate clinical professor of medicine at Vanderbilt Medical School and director of the Hypertension Institute at St. Thomas Hospital in Tennessee.3
In one study, those who consumed 4069 mg of potassium per day had a 49 percent lower risk of death from ischemic heart disease compared with those who consumed less potassium (about 1000 mg per day).3
High potassium intakes are also associated with a reduced risk of stroke, protection against loss of muscle mass, preservation of bone mineral density and reduction in the formation of kidney stones.3
Studies have shown that type 1 diabetics who consume high-fiber diets have lower blood glucose levels and type 2 diabetics may have improved blood sugar, lipids and insulin levels. One cup of cherry tomatoes provides about 2 grams of fiber.
The Dietary Guidelines for Americans recommends 21-25 g/day for women and 30-38 g/day for men.
Collagen, the skins support system, is reliant on vitamin C as an essential nutrient that works in our bodies as an antioxidant to help prevent damage caused by the sun, pollution and smoke, smooth wrinkles and improve overall skin texture.5
Eating foods that are high in water content and fiber like tomatoes can help to keep you hydrated and your bowel movements regular. Fiber is essential for minimizing constipation and adding bulk to the stool.
Adequate folic acid intake is essential for pregnant women to protect against neural tube defects in infants.
The folic acid in tomatoes may also help with depression by preventing an excess of homocysteine from forming in the body, which can prevent blood and other nutrients from reaching the brain. Excess homocysteine interferes with the production of the feel-good hormones serotonin, dopamine, and norepinephrine, which regulate not only mood, but sleep and appetite as well.4
Scientific evidence reports that the phytochemicals found in blueberries have potential as effective inhibitors of several types of cancer.
Animal studies have suggested that blueberries could reduce the damaging effects of age related disorders like Alzheimer’s disease. The research found that blueberries help with protecting the brain from oxidative stress and when older rats received blueberries each day, they exhibited significant improvements in motor skills and learning capacity.
Blueberries improve vision and help to protect against age related macular degeneration. Several studies have shown that blueberry extract also improves night time vision by allowing for faster adjustment to darkness after exposure to bright light.
Other studies also indicate that blueberries could protect against glaucoma and cataracts.
Blueberries contain the same compounds that are found in cranberries which prevent the bacteria that cause urinary tract infections from adhering to the bladder wall.
Research has shown that bioactive compounds found in blueberries known as anthocyanins protect against high blood pressure. In comparison to those who consumed no blueberries, individuals consuming one or more helping of blueberries each week were 10% less likely to get high blood pressure.
Blueberries are a superb source of antioxidant compounds. They are also an excellent source of vitamin C, insoluble and soluble fiber. They are also a good source of vitamin E, manganese, and riboflavin.