A recent study suggests that incorporating whole grains like oatmeal, brown rice, and whole-grain bread into your diet might significantly benefit your heart health. Eating four to six servings of whole grains each day could lower body weight, cholesterol, blood sugar, and blood pressure, according to a comprehensive meta-analysis published in the European Heart Journal.
This analysis examined data from 87 randomized trials involving over 6,500 participants from various regions including Asia, Europe, America, Canada, Australia, and Brazil. Researchers discovered that the strongest health benefits were seen when individuals consumed approximately 60 to 100 grams of whole grains a day. This roughly equates to one bowl of oatmeal, two slices of whole-grain bread, and a serving of brown rice.
Lead author Helda Tutunchi from Tabriz University of Medical Sciences in Iran remarked that this study is the largest of its kind that reviews the relationship between whole-grain intake and cardiovascular risk factors.
Participants who increased their whole grain intake experienced reductions in body weight, waist size, blood pressure, total cholesterol, LDL (“bad”) cholesterol, triglycerides, blood sugar levels, and even levels of interleukin-6, which is a marker of inflammation. Tutunchi noted that the positive effects of whole grains seem to be due to multiple small improvements working together rather than a single impactful change.
However, the researchers pointed out that many studies included were of short duration and did not directly measure heart attacks or strokes. They emphasized the need for longer-term research to fully understand the impact.
Interestingly, four to six servings of whole grains surpass the current Dietary Guidelines for Americans, which recommend two to four servings. In fact, many people don’t even meet the lower end of that suggestion, as said by Lauren Manaker, a registered dietitian from South Carolina. She advised that transitioning from no servings to six daily might be overwhelming, so it’s better to start slowly—perhaps aiming for two servings to begin with.
Simple changes, such as opting for oatmeal in the morning or substituting refined grains for whole grains could make a difference. Yet, consumers should be cautious; not all brown-colored breads are whole grain. Manaker stressed the importance of checking ingredient lists to ensure whole grains are near the top and that there’s sufficient fiber present.
The essence of whole grains is that they contain all parts of the grain kernel—bran, germ, and endosperm—unlike processed grains, which may have lost some components. While further research is warranted, the findings suggest that increasing whole-grain consumption is an accessible and cost-effective way to bolster heart health alongside other healthy habits.
In an accompanying editorial, Cecilie Kyro from the Danish Cancer Institute and her colleagues advocated for policies promoting access and affordability of whole-grain foods while discouraging reliance on ultra-processed items.
