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Research Weighs the Whole30 Diet

Nina Ghamrawi, MS, RD, CDE
May 27, 2023
December 8, 2023

The Whole30 diet is a popular dietary approach that has gained attention in recent years for its claims to improve overall health and wellness. It involves eliminating certain food groups for 30 days, including grains, dairy, legumes, and processed foods.

This diet has been touted as a way to reset the body and improve gut health, but is it safe for everyone? Let's dive into the origins of the Whole30 diet, its relationship to the paleo (caveman) diet, and the research behind its safety and potential benefits.

Origins and Rules of the Whole30 Diet

The Whole30 Diet was created by Dallas and Melissa Hartwig, a married couple with a background in nutrition and physical therapy. The diet was first introduced in 2009 as a 30-day program to help people identify food sensitivities and improve their health.

On the Whole30 diet, you're encouraged to eat whole, unprocessed foods, including (non-cured) meat, seafood, eggs, vegetables, fruits, root vegetables like potatoes and yams, and healthy fats. Foods that are not allowed include grains, dairy, added sugars, and processed foods. In some versions of the whole30 diet, beans and other legumes are not allowed.

The Whole30 diet is often compared to the caveman diet, as it emphasizes the consumption of whole, unprocessed foods that were available to our ancient ancestors. However, unlike the paleo diet, the Whole30 diet eliminates certain food groups, including grains, legumes, and dairy, which are allowed on the paleo diet.

Research on the Safety of the Whole30 Diet

While there is limited research specifically on the Whole30 diet, some studies suggest that eliminating certain food groups may have potential health benefits.

The Good

One study found that eliminating dairy may improve symptoms of acne in some individuals. Another study found that a diet low in fermentable carbohydrates, similar to the Whole30 diet, may reduce symptoms of irritable bowel syndrome (IBS) in some people.

The Bad

However, some health professionals are concerned about the potential risks of eliminating entire food groups for an extended period of time. Eliminating grains and legumes, for example, may lead to nutrient deficiencies, while eliminating dairy may increase the risk of osteoporosis in some individuals.

The Whole30 diet may not be safe for people with certain chronic conditions, such as kidney disease or diabetes. People with these conditions may need to be cautious about restricting certain food groups, such as carbohydrates, which are a major component of grains and legumes.

Takeaways

The Whole30 diet may have potential benefits for some individuals, but it is important to consider the potential risks and limitations before embarking on this dietary approach. The diet's emphasis on whole, unprocessed foods is generally a positive aspect, but eliminating entire food groups may lead to nutrient deficiencies or other health risks. If you are going to try the Whole30 diet, choose a less-restrictive version, like one that also includes legumes. And definitely speak with a Dietitian or Diabetes Specialist to see how the diet and each meal should be balanced for your own specific needs, BEFORE making any major dietary changes.

If you are interested in exploring other popular diets, check out our articles on the Mediterranean Diet and the Keto Diet.

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