Nutritional recommendations and dietary fads are constantly changing. “There is widespread chaos in the world of nutrition,” says Andrew Freeman, the director of cardiovascular prevention and wellness at National Jewish Health in Denver. “It seems recommendations swing back and forth all the time.”
In an attempt to prove which food fads actually constitute healthy eating, Freeman, along with 11 other researchers, analyzed nearly 150 nutrition studies. In doing so, they were able to determine which food fads are backed by science and which are not. Their results have been published in the Journal of the American College of Cardiology.
Below covers fads ranging from gluten to juicing. Check out which ones are worth trying!
COOKING OILS
Coconut has stepped into the limelight. All of a sudden, coconut oil has achieved the trendy superfood status. However, when it comes to heart health, studies show that olive oil trumps coconut oil. Ultimately, Freeman concludes that there’s simply not enough data to confirm the health benefits of coconut oil. As the review says, “Current claims of documented health benefits of the tropical oils are unsubstantiated and use of these oils should be discouraged.”
ANTIOXIDANTS
After being featured on “The Oprah Winfrey Show,” acai berries received wide acclaim for being rich in antioxidants. Despite its growing popularity, acai has just as many health benefits as blueberries, raspberries, and strawberries, says Freeman. Acai possesses nothing special. Additionally, Freeman points out that there’s no evidence that antioxidant supplements benefit heart health. If you want antioxidants, it’s best to consume them directly from fruits and vegetables.
NUTS
Once shunned for being high in fat, nuts are now making a comeback. Since they contain heart-healthy fats, nuts make a great snack. However, Freeman warns readers of the risks in eating too many nuts, which are high in calories. “A lot of people are eating loads — you can easily eat several hundred calories in one sitting, so people need to be careful that they don’t overdo it,” says Freeman.
JUICES
Juice cleanses are so popular that many pay between $150 and $200 for the high-end brands. Though consumers are investing in this trend, the verdict is still out on its heart health benefits. Freeman and his team hesitate to support juicing because it leads to a high consumption of calories and natural sugars before getting full. “Until comparative data become available,” the review concludes, “whole food consumption is preferred, with juicing primarily reserved for situations when daily intake of vegetables and fruits is inadequate.”
GLUTEN
Not including the 6% of the population with celiac disease or other gluten-related sensitivities, there’s little evidence supporting a gluten-free diet. Whether gluten causes negative health effects like weight gain is still in question. “There’s a lot of controversy, not a lot of data,” says Freeman.
For those without a gluten sensitivity, it’s best to eat unprocessed grains instead of removing gluten from one’s diet altogether. Gluten-free does not constitute healthy eating. For instance, removing the gluten from pizza doesn’t remove the carbohydrates and the cheese.
Remain Mindful
While these healthy food fads can feel good in the moment, there are dangers associated with over-fixating on a perfectly “clean and healthy” diet. An obsession with clean eating can lead to a condition known as orthorexia nervosa. This is not to be confused with other eating disorders in which the goal is to lose weight. Instead, those suffering from orthorexia focus on the quality of the foods eaten, not the quantity. This results in an unhealthy obsession with labeling foods as “dirty” or “clean”. It can also create great bouts of anxiety over what types of foods are going to be available to them to eat. And while the goal is not to lose weight, any diet with extreme restrictions is bound to result in weight loss and some malnutrition. Therefore, it is crucial to enjoy healthy eating in moderation. As they say, “too much of a good thing can be a bad thing”.
The Bottom Line about Food Fads
Ultimately, there is no magical “superfood” that can counteract the effects of an unhealthy diet. No food singlehandedly leads to weight loss. The key to a heart-healthy diet is simple: eat a lot of fruits, vegetables, whole grains, and legumes, and a moderate amount of nuts, lean meats, vegetable oils, and low-fat dairy products. Healthy eating is about moderation, says Freeman. It may not be ground-breaking advice, but it is backed by science.
For more questions about healthy eating, your best resource is a nutritional specialist. Before scheduling a visit, make sure it is covered by your health plan! Don’t have health insurance? Contact a licensed agent today to discuss your plan options!
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This article was updated on September 19, 2025.