Are protein bars safe for people with heart disease?

A 2026 study published in the Journal of Applied Physiology suggests that the non-nutritive sweetener erythritol, commonly found in protein bars and supplements, may increase the risk of cardiovascular and cerebrovascular issues. However, experts emphasize that the problem lies not in protein bars themselves but in the additional ingredients, frequency of consumption, and overall dietary context.

Dr. Chirag D, an Interventional Cardiologist at Aster Whitefield Hospitals, clarifies that protein bars do not directly cause heart attacks, but rather, it's the combination of other components and overconsumption that could be problematic. He advises consumers to scrutinize the nutritional information on product labels, focusing on saturated fat, added sugar, sodium content, calories, and fiber levels.

Dr. Chirag recommends prioritizing whole foods over highly processed options and meeting protein requirements through sources like beans, soy, nuts, seeds, fish, low-fat dairy, and lean meats. For those with pre-existing heart conditions, he recommends exercising caution with stimulant-containing products, such as caffeine supplements, which can potentially raise blood pressure and heart rate.

Additionally, individuals with kidney issues, diabetes, or other diseases should consult healthcare providers before incorporating high-protein nutrition plans or supplements into their diets.