Protein bars are a convenient way to supplement daily protein intake, but people living with heart disease may need to look beyond the prominent “high protein” label on the packaging. Ingredients such as saturated fat, added sugar, sodium and certain non-nutritive sweeteners can influence the nutritional value of a product, making it important to check the complete nutrition label before choosing a bar.

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A 2026 study published in the Journal of Applied Physiology examined concerns surrounding erythritol, a non-nutritive sweetener used in some protein bars and nutritional supplements. The study reported an association between erythritol and an increased risk of cardiovascular and cerebrovascular events. However, an association does not automatically establish that consuming erythritol causes heart attacks or strokes, and the findings should not be interpreted as proof that all protein bars are unsafe.

Dr Chirag D, Consultant in Interventional Cardiology at Aster Whitefield Hospitals in Bengaluru, cautioned against describing protein bars and protein supplements as foods that directly cause heart attacks. The safety of a particular product depends on its ingredients, nutritional composition, the amount consumed and the individual’s overall health.

For people with heart disease, saturated fat is one of the key details to check. Some bars contain ingredients such as chocolate coatings, palm oil or other fats that can increase their saturated fat content. Regularly consuming too much saturated fat can raise LDL cholesterol, a risk factor for cardiovascular disease.

Added sugar is another consideration. Protein bars marketed as fitness or health products may contain sweeteners, syrups or other ingredients that increase their sugar content. Choosing options with less added sugar can help people avoid unnecessary excess, particularly when managing other cardiovascular risk factors.

Sodium also deserves attention, as excessive sodium intake can contribute to high blood pressure. People who have been advised to limit sodium should compare labels carefully rather than assuming that a protein-rich product is automatically suitable for them.

Calories and fibre are equally useful points of comparison. Some bars provide substantial calories in a small serving, while others contain useful amounts of fibre. Checking the serving size alongside the nutritional values can help consumers understand what they are actually eating.

People with heart disease do not necessarily need to avoid every protein bar. Instead, they should compare ingredients and nutritional information, avoid relying solely on front-of-pack health claims and discuss suitable choices with their cardiologist or dietitian. Those with additional dietary restrictions or specific medical needs may require more individualised guidance.

Ultimately, protein bars are best viewed as a convenient food option rather than a guaranteed health product. A balanced diet, appropriate portion sizes and attention to overall nutritional quality remain important considerations for people looking after their heart health.