Oral Health

A persistent bad taste in the mouth — metallic, bitter, sour or salty — is usually driven by oral bacteria and a dry mouth. Here's what each taste points to and the routine that clears it.

Over 500 common medications list dry mouth as a side effect — and a dry mouth changes what your toothpaste needs to do. What to look for, what to avoid, and the formula we rate.

A metallic taste in the mouth usually starts in the mouth itself — poor hygiene, dry mouth or gum irritation — though medicines and pregnancy are common triggers too. Here's every cause and how to fix it.

Bad breath that survives twice-daily brushing, daily flossing and daily tongue cleaning is NOT a hygiene failure - it is a symptom, and the most common cause by far is periodontal (gum) disease. Here is every real cause of persistent bad breath, the stomach myth that costs people years, and exactly what to say when you book the dentist.