Recent studies have found that watermelon seeds are also wonderfully nutritious, especially if they are sprouted and shelled. They are hig...
Recent studies have found that watermelon seeds are also wonderfully nutritious, especially if they are sprouted and shelled. They are high in protein, magnesium, vitamin B and good fats, according to an analysis by the International Journal of Nutrition and Food Sciences.
Here are the nutrition facts for the watermelon, according to the U.S. Food and Drug Administration, which regulates food labeling through the National Labeling and Education Act:
Nutrition facts
Calories: 80 (Calories from Fat 0)
*Percent Daily Values (%DV) are based on a 2,000 calorie diet.
Dietary Fiber: 1g (4%)
Sugars: 20g
Sodium: 0mg (0%)
Potassium: 270mg (8%)
Protein: 1g
Vitamin C: (25%)
Calcium: (2%)
Iron: (4%)
Calories: 80 (Calories from Fat 0)
*Percent Daily Values (%DV) are based on a 2,000 calorie diet.
Dietary Fiber: 1g (4%)
Sugars: 20g
Sodium: 0mg (0%)
Potassium: 270mg (8%)
Protein: 1g
Vitamin C: (25%)
Calcium: (2%)
Iron: (4%)
Serving size: 2 cups diced (10 oz / 280 g)
Amount per serving (and %DV*)
Total Fat: 0g (0%)
Total Carbohydrate: 21g (7%)
Cholesterol: 0mg (0%)
Vitamin A: (30%)
Health benefits
Heart health
Watermelon's high levels of lycopene are very effective at protecting cells from damage and may help lower the risk of heart disease, according to a study at Purdue University. A study published in the American Journal of Hypertension found that watermelon extracts helped reduce hypertension and lower blood pressure in obese adults.
Watermelon may be especially important for older women. A study published in Menopause found that postmenopausal women, a group known to have increased aortic stiffness, who took watermelon extract for six weeks saw decreased blood pressure and arterial stiffness compared to those who did not take watermelon extract. The authors of the study attributed the benefits to citrulline and arginine.
Arginine can help improve blood flow and may help reduce the accumulation of excess fat.
Anti-inflammatory properties
"The lycopene in watermelon makes it an anti-inflammatory fruit," Jarzabkowski said. Lycopene is an inhibitor for various inflammatory processes and also works as an antioxidant to neutralize free radicals. Additionally, the watermelon contains choline, which helps keep chronic inflammation down, according to a 2006 article published in Shock medical journal.
Reducing inflammation isn't just good for people suffering from arthritis. "When you're sick, you have cellular damage, which can be caused by a variety of factors including stress, smoking, pollution, disease, and your body becomes inflamed," Jarzabkowski said. "It's called 'systemic inflammation.'" In this way, anti-inflammatory foods can help with overall immunity and general health.
Hydration
"Watermelons help with overall hydration, and that is a great thing," said Lemond. "They say we can get 20-30 percent of our fluid needs through our diet alone, and foods like these certainly help." Additionally, their juice is full of good electrolytes. This can even help prevent heat stroke.
Digestion
The watermelon contains fiber, which encourages a healthy digestive tract and helps keep you regular.
Skin and hair benefits
Vitamin A is stellar for your skin, and just a cup of watermelon contains nearly one-quarter of your recommended daily intake of it. Vitamin A helps keep skin and hair moisturized, and it also encourages healthy growth of new collagen and elastin cells, according to the Cleveland Clinic. Vitamin C is also beneficial in this regard, as it promotes healthy collagen growth.
Muscle soreness & athletic performance
Watermelon-loving athletes are in luck: drinking watermelon juice before an intense workout helps reduce next-day muscle soreness and heart rate, according to a 2013 study published in the Journal of Agricultural and Food Chemistry. This can be attributed to watermelon's amino acids citrulline and arginine, which help improve circulation.
A 2015 study published in the Journal of Applied Physiology suggests that watermelon's citrulline may also help improve athletic performance. Study participants who took citrulline supplements saw a boosted performance with more power production in high-intensity exercise like cycling and sprinting.
Cancer prevention
Like other fruits and vegetables, watermelons may be helpful in reducing the risk of cancer through their antioxidant properties. Lycopene in particular has been linked to reducing prostate cancer cell proliferation, according to the National Cancer Institute.
Health risks
If eaten in reasonable amounts, watermelons should produce no serious side effects. If you eat an abundance of the fruit daily, however, you may experience problems from having too much lycopene or potassium.
The consumption of more than 30 mg of lycopene daily could potentially cause nausea, diarrhea, indigestion and bloating, according to the American Cancer Society.
People with serious hyperkalemia, or too much potassium in their blood, should probably not consume more than about one cup of watermelon a day, which has less than 140 mg of potassium. According to the National Institutes of Health, hyperkalemia can result in irregular heartbeats and other cardiovascular problems, as well as reduced muscle control.
Loading up on water-dense foods like watermelon can be tempting for those looking to lose weight because they help you feel full, but Lemond cautions against going to extremes. "Eating more fruits and vegetables of any kind naturally helps decrease overall calories (energy) of the diet," she said. "We know that people that eat higher quantities of fruits and vegetables typically have healthier body weights However, I do not recommend eating only watermelon … You will lose weight, but that weight will be mostly muscle."
Jarzabkowski also warned watermelon lovers to be mindful of their sugar intake. "Though watermelon's sugar is naturally occurring, [watermelon] is still relatively high in sugar."
"My recommendation is always to vary your selections," said Lemond. "Watermelon is a great hydrating food, so keep it in along with other plant foods that offer other benefits. Variety is always key."
Watermelon facts
Some fun facts about watermelons, from the National Watermelon Promotion Board and Science Kids:
The watermelon (Citrullus lanatus) is related to cucumbers, pumpkins and squash.
The watermelon probably originated in the Kalahari Desert in Africa.
Egyptians placed watermelons in the burial tombs of kings to nourish them in the afterlife. The first recorded watermelon harvest is depicted in Egyptian hieroglyphics from about 5,000 years ago.
Merchants spread the use of watermelons along the Mediterranean Sea. By the 10th century, watermelons had found their way to China, which is now the world's top producer of watermelons.
The Moors in the 13th century brought watermelons to Europe.
The watermelon likely made its way to the United States with African slaves.
Early explorers used watermelons as canteens.
The first cookbook published in the United States in 1776 contained a recipe for watermelon rind pickles.
About 200 to 300 varieties are grown in the United States and Mexico, but only about 50 varieties are very popular.
By weight, watermelon is the most consumed melon in the United States, followed by cantaloupe and honeydew.
The watermelon is the official state vegetable of Oklahoma.
All parts of a watermelon can be eaten, even the rind.
Guinness World Records says the world's heaviest watermelon was grown by Lloyd Bright of Arkadelphia, Arkansas, in 2005. It weighed 268.8 lbs. (121.93 kg).
The United States ranks fifth in the worldwide production of watermelons. Forty-four states grow watermelons, with Florida, Texas, California, Georgia and Arizona leading the country in production.
A seedless watermelon is a sterile hybrid, which is created by crossing male pollen for a watermelon, containing 22 chromosomes per cell, with a female watermelon flower with 44 chromosomes per cell. When this seeded fruit matures, the small, white seed coats inside contain 33 chromosomes, rendering it sterile and incapable of producing seeds.
