India, Jan. 12 -- For decades, a stinging swish of minty mouthwash has been the gold standard of oral hygiene. But according to a California-based dental expert, that morning ritual might be doing more harm than good - specifically for your heart and metabolic health. Also read | Mouthwash vs oil pulling: Which is better? Know benefits and side effects from expert

In a warning shared on December 28, 2025, San Francisco dentist Dr Mark Burhenne urged people to reconsider their use of antiseptic mouthwashes. His advice was blunt: "In your 30s, your cardiologist will tell you to pour your mouthwash down the toilet. It is very important that you take this advice seriously."

The core of Dr Burhenne's warning lay in the delicate ecosystem of ...