Food experts warn that mayo can quietly undo tuna’s health benefits.

Tuna sandwiches have long been marketed as a healthy lunch, but food experts say one common ingredient quietly undermines that reputation. Mayonnaise, often added by habit rather than thought, can turn an otherwise lean, protein-rich meal into something far less heart-friendly.
The concern isn’t just calories. Nutrition specialists point to the type of fat in traditional mayo and how easily it pushes meals into unhealthy territory without people realizing it. Portion sizes also tend to creep up far beyond what labels suggest.
As a result, experts say it may be time to rethink what you mix into tuna. The good news is there are alternatives that keep the sandwich satisfying while aligning better with modern nutrition advice.








