Here's what no one tells you: most persistent bad breath starts in your digestive system.
You can brush 3x daily, use expensive mouthwash, pop mints like candy. Your breath still comes back. Why? Odor-causing toxins in your gut literally travel up and get released through your breath.
NO/BO neutralizes these internal toxins before they reach your mouth. You're not masking the smell. You're eliminating it at the source.