5 “Healthy” Foods That May Be Worse for You Than You Think

Supermarket shelves are packed with products carrying labels and claims that suggest they are healthy choices. However, research and real-world experience show that some foods with a healthy reputation may not live up to it.

“Nutrition science is constantly evolving, and foods that were once considered healthy sometimes turn out to be less beneficial than we thought,” explains dietitian Jessica Cording.

Following are five popular products that have long been viewed as healthy, and why they may deserve a second look.

1. Plant-Based Meat Alternatives

When plant-based products first became popular, many consumers assumed that meat substitutes were automatically healthier simply because they did not come from animals.

“When plant-based foods became a big trend, I remember thinking that fake meat products were healthy just because they weren’t animal-based,” Cording says.

However, many plant-based meat alternatives contain high levels of sodium and numerous processed additives. A 2022 study published in the Journal of Nutritional Science examined their effects and found results that differed from the researchers’ expectations. They had anticipated improvements in inflammatory markers among people consuming plant-based meat alternatives, but those benefits were not clearly demonstrated.

2. Fat-Free Cheese

Fat-free cheese may sound like the healthier option, but these products are often highly processed and may not provide the same feeling of fullness as higher-fat varieties.

A study published in Neurology in January 2026 followed approximately 28,000 people over 25 years. According to the study, consumption of full-fat dairy products was associated with up to a 17% lower risk of cognitive disease later in life.

The findings challenge the long-standing assumption that removing all fat from dairy products necessarily makes them healthier.

3. Diet Drinks

“Diet drinks containing aspartame once seemed like a healthier choice to me,” Cording says.

The World Health Organization has classified aspartame as “possibly carcinogenic to humans.” In addition, a 2023 review published in Cureus linked high consumption of diet beverages with a variety of health concerns.

While diet drinks may contain fewer calories than sugary beverages, that does not necessarily make them an ideal everyday choice.

4. Reduced-Calorie Yogurt

Low-calorie yogurt is often marketed as a healthier alternative, but some varieties contain significant amounts of artificial sweeteners while providing relatively little protein. As a result, they may also be less satisfying and leave you hungry sooner.

A better option may be a plain, unsweetened yogurt with a simpler ingredient list, allowing you to add your own fruit or other toppings if desired.

5. Frozen Yogurt

Frozen yogurt has long enjoyed a reputation as a healthier dessert. “I used to think of frozen yogurt as a ‘healthy’ treat,” Cording says.

However, a 2017 study published in Nutrition Research found that frozen-yogurt consumers may take in dozens or even hundreds of additional calories compared with those eating regular yogurt, particularly because of toppings and larger serving sizes.

In other words, frozen yogurt is still best viewed as a dessert rather than as a health food.

The Bottom Line

A “healthy” label does not always tell the whole story. Food trends change, research develops, and products marketed as lighter or more natural can still be highly processed or contain ingredients that may not offer the benefits consumers expect.

The best approach is to look beyond the marketing and pay attention to the ingredient list, nutritional value, level of processing, and how satisfying a food actually is.