Metallic Taste and Taste Disorders. Key points. A metallic taste in your mouth is a type of taste disorder known medically as parageusia. Common causes include new medications, pregnancy, and food allergies. In rare cases, metallic taste can be a sign of Parkinsonâs or Alzheimerâs disease.
Hi Tommy, As far as recreational diving goes, the maximum limit from PADI (a top certification agency) is 130 feet once you pass your deep diving course. If you have an open water certification, you are certified for dives down to 60 feet.
Since the pressure of all inhaled gases increases with increasing depth, there is risk of inhaling too much oxygen and developing oxygen toxicity. However, this is unlikely to occur in recreational diving because the depth limit (130 feet) effectively limits length of exposure to high oxygen concentrations.