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New study looks at refined grains – and may cause confusion

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Quick Summary: Refined Grains vs. Whole Grains

Topic: Educational guide on grain types and health implications
Key Components: Whole grains (endosperm, germ, bran with fiber intact); Refined grains (fiber removed, often enriched with vitamins/minerals); Enriched products (added folic acid, B vitamins, iron)
Main Finding: While a recent meta-analysis of 32 studies showed refined grains not associated with disease, established research demonstrates whole grains protect against type 2 diabetes, cardiovascular disease, and support healthy weight and inflammation markers
Recommended Approach: Prioritize whole grains (≥3 servings daily) while minimizing refined grain products like pastries, donuts, and cake; enriched breads are acceptable occasional choices but lack beneficial fiber
Best For: Anyone seeking evidence-based guidance on making whole grain choices for optimal long-term health and disease prevention
Key Takeaway: Nutrition science is nuanced; the preponderance of evidence supports whole grains as superior for maintaining healthy microbiota, immune function, and reducing chronic disease risk

Don’t desert your high-fiber choices, because they have proven – and needed – health benefits.

You may have heard about a new study just published in a scientific journal that said that eating refined grains is not associated with negative health consequences like obesity, heart disease and type 2 diabetes or mortality. This study compiled and evaluated results from 32 published studies that looked at dietary patterns and their relationship to diseases.

This was quite a sweeping conclusion and a surprising revelation to me, as a registered dietitian nutritionist, and here’s why.

Research in the study of whole grains shows people whose diets are higher in fiber and whole grains have less chronic disease and less premature death. So how do we make sense of these new conclusions? Can we just eat as many refined grains now as we want? And what are refined grains, anyway?

The answer lies somewhere in between. Let me give you some perspective as you consider the new study conclusions and determine what, if any, changes you should make in your eating habits for optimal health. Nutrition is a science, and rarely is science black and white.

It is well accepted in the scientific community that whole grains are one of the healthiest foods we can eat, and generally speaking, have been considered superior to refined grains. Population studies of eating patterns show that higher intakes of whole grains protect against many diseases, like type 2 diabetes and cardiovascular disease, and they even help lower inflammation. People who eat at least three servings of whole grains a day have lower body weights and lower amounts of body fat, as well as lower waist circumference numbers, an accurate marker for chronic diseases. These are the amazing health benefits we can receive if we eat whole grains.

Fiber is essential to keeping the microbiota (colony of bacteria) in our guts healthy, and it also supports a healthy immune system. Whole grains contain all three parts of the grain: the endosperm, germ and bran — the outer fibrous part of the wheat kernel. In whole grains, the fiber stays intact and whole, but in refined grain products, such as white flour, the fiber is removed in the milling process. Certain vitamins and minerals are also destroyed in the milling process.

Products called “enriched” contain vitamins and minerals that have been added to increase their nutrient content. Examples are folic acid, some B vitamins and oftentimes iron. Fiber is not added back, so all refined products are devoid of fiber. Are enriched grain products better than eating a chocolate chip cookie? Absolutely. How much and how often you eat refined grain products vs. how many whole grain products make up your daily eating pattern will determine the health benefits — as well as the important nutrients — you get.

Health organizations suggest we eat less refined grains by swapping them out for whole grains. Refined grains like pastries, donuts, cake are poor choices, while enriched breads and cereals are better refined choices. It makes sense to separate these two camps and eat fewer of the high calorie, nutrient-poor refined grains and try to eat half of our grain choices as whole grains to increase our fiber intake and get the documented health benefits they provide.

More randomized, controlled studies are obviously needed, and this conclusion may be jumping the gun. Don’t desert your high-fiber choices, because they have proven — and needed — health benefits.

First published in The Daily Herald

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*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. Always consult with a qualified healthcare professional before starting any new supplement or health program, especially if you have existing medical conditions or take prescription medications.