Watermelons are a rich source of essential nutrients, such as potassium, vitamin C, and magnesium, and are known for their high bioavailability of antioxidants like lycopene and l-citrulline. Previous studies have shown that watermelon supplements and extracts can reduce blood pressure and cholesterol levels.
While there is a limited amount of research on the health effects of consuming raw watermelon, the existing studies indicate positive outcomes, often involving large quantities of over 2 pounds per day. These studies have reported associations between watermelon consumption and lowered cholesterol levels, body weight, and a reduced risk of prostate, lung, and breast cancers.
Further investigations into the health effects of raw watermelon could lead to improvements in dietary guidelines and preventive strategies for cardiometabolic health.
Two recent studies shed light on the potential benefits of watermelon consumption. The first study, published in the journal Nutrients, examined the dietary habits of children and adults who consumed watermelon. The researchers found that watermelon consumers had higher intakes of dietary fiber, magnesium, and potassium compared to non-consumers. They also had lower intakes of added sugars and saturated fatty acids.
The second study, also published in Nutrients, focused on the vascular function of individuals who consumed watermelon juice for two weeks. The findings suggested that drinking watermelon juice had a protective effect on vascular function.
Dr. John A. Galat, a cardiac surgeon at Novant Health in Charlotte, North Carolina, who was not involved in the studies, commented on their implications. He noted that these studies, funded by the National Watermelon Promotion Board, suggest that regular consumption of watermelon might have health benefits. He also emphasized that overindulging in watermelon is unlikely to have adverse effects, unlike many other enjoyable foods.
However, Dr. Galat cautioned that based solely on these two studies, he would not necessarily recommend watermelon consumption to individuals who do not already enjoy the fruit.
The first study analyzed data from the National Health and Nutrition Examination Survey (NHANES), including information from 56,133 individuals between 2003 and 2018. By comparing the dietary recalls of watermelon consumers and non-consumers, the researchers estimated overall nutrient intake. They accounted for various factors, such as physical activity, income ratio, smoking status, alcohol intake, and consumption of other foods.
While these studies provide valuable insights into the potential benefits of watermelon, further research is needed to establish concrete recommendations and fully understand its effects on diet quality and cardiometabolic health.