The Benefits of Whole Grains
There’s a growing consensus: whole grains are beneficial for our health.
Recent studies over the last twenty years have linked a diet rich in whole grains to a reduced likelihood of developing heart disease, hypertension, high cholesterol, and type 2 diabetes. Plus, it seems to help with maintaining a healthy weight.
A new analysis has taken a deeper look into how whole grains impact cardiovascular and metabolic health at a molecular level, particularly focusing on how much you need to consume to see real benefits.
The findings, which appeared in the European Heart Journal, indicate that the positive effects can begin with around 90 grams or three servings per day. That’s roughly equivalent to two slices of whole wheat bread and a bowl of oatmeal. Interestingly, consuming four to six servings may enhance the benefits even further.
Researchers discovered that individuals who included three to six servings of whole grains in their diets for periods ranging from two weeks to two years noticed slight improvements in various health markers. These included total cholesterol, LDL cholesterol, blood pressure, body weight, and waist circumference—factors closely tied to cardiovascular health risk. Although the effects were subtle, they supported what larger population studies had previously indicated, according to Dagfinn Aune, a coauthor of the meta-analysis.
Aune summarized the study’s implications by suggesting a “likely causal effect” of whole grains in potentially reducing cardiovascular disease risk.
However, it’s important to note that simply adding whole wheat toast to your breakfast of bacon and eggs won’t magically boost your heart health.
Healthcare professionals advocate for prioritizing whole grains over refined options to better support heart health.
Whole grain foods—including oatmeal, brown rice, whole wheat bread, farro, popcorn, and quinoa—contain all parts of the grain as they are found in nature. On the flip side, refined grains (think white rice and products made with white flour) undergo processing that removes the less desirable components, where most of the fiber and essential nutrients actually lie.
While eating whole grains is important, experts emphasize that a single dietary change is unlikely to prevent heart disease entirely. Alice Lichtenstein, a professor at the Friedman School of Nutrition Science and Policy at Tufts University, mentioned that simply switching to a whole grain cinnamon bun over a refined version might not yield noticeable benefits.
She also pointed out that indiscriminately increasing carbohydrate intake to meet a whole grain quota could inadvertently lead to weight gain.
In fact, most people in the U.S. aren’t hitting the two to four servings of whole grains recommended in the latest Dietary Guidelines for Americans. A serving size could be one slice of whole wheat bread or half a cup of cooked oats, brown rice, or quinoa.
The American Heart Association encourages the consumption of whole grain foods but doesn’t set a specific daily target, as there’s no one-size-fits-all answer that suits everyone’s body or lifestyle. Instead, Lichtenstein highlighted the importance of a general dietary pattern over specific quantities of any single food.
The guidelines also emphasize the inclusion of a variety of fruits and vegetables while recommending limits on saturated fats, added sugars, salt, ultraprocessed foods, and alcohol.
If you’re looking for a place to start, consider replacing refined grains in your diet with whole grains. Aiming to substitute three servings each day could be a feasible goal.
Lichtenstein advised gradually swapping items in your pantry as they run out for whole grain alternatives.
Of course, this transition may not always be straightforward. Products labeled as “multigrain” or “made with whole grain” can often still be mainly composed of refined flour.
She suggested checking the ingredient list on packaging, ensuring that whole grain is listed as the first ingredient. If it isn’t, it’s probably best to leave it on the shelf.
