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Whole grains deliver many important nutrients. These include:
One of the biggest health benefits of whole grains is that they lower your risk of heart disease, which is the leading cause of death worldwide.
A review of 10 studies found that three 1-ounce (28-gram) servings of whole grains daily may lower your risk of heart disease by 22%.
Similarly, a 10-year study in 17,424 adults observed that those who ate the highest proportion of whole grains in relation to their total carb intake had a 47% lower risk of heart disease.
Researchers concluded that heart-healthy diets should include more whole grains and fewer refined grains.
Most studies lump together different types of whole grains, making it hard to separate the benefits of individual foods.
Still, whole-grain breads and cereals, as well as added bran, have been specifically linked to reduced heart disease risk.
Whole grains may also help lower your risk of stroke.
In an analysis of 6 studies in nearly 250,000 people, those eating the most whole grains had a 14% lower risk of stroke than those eating the fewest.
Furthermore, certain compounds in whole grains, such as fiber, vitamin K, and antioxidants, can reduce your risk of stroke.
Whole grains are also recommended in the DASH and Mediterranean diets, both of which may help lower your risk of stroke.
Eating fiber-rich foods can help fill you up and prevent overeating. This is one reason high-fiber diets are recommended for weight loss.
Whole grains and products made from them are more filling than refined grains, and research suggests that they may lower your risk of obesity.
In fact, eating 3 servings of whole grains daily was linked to lower body mass index (BMI) and less belly fat in a review of 15 studies in almost 120,000 people.
Another study reviewing research from 1965 to 2010 found that whole-grain cereal and cereal with added bran were associated with a modestly lower risk of obesity.
Eating whole in place of refined grains may lower your risk of type 2 diabetes.
A review of 16 studies concluded that replacing refined grains with whole varieties and eating at least 2 servings of whole grains daily could lower your risk of diabetes.
In part, this is because fiber-rich whole grains can also help with weight control and prevent obesity, a risk factor for diabetes.
Moreover, studies have linked whole grain intake to lower fasting blood sugar levels and improved insulin sensitivity.
This could be due to magnesium, a mineral found in whole grains that helps your body metabolize carbs and is tied to insulin sensitivity.