Pulmonary Arterial Hypertension (PAH) is a type of high blood pressure that affects the arteries in your lungs and the right side of your heart. It required you to typically be on oxygen all day and all night while sleeping. My husband Nik gave me four ounces of John Ellis Elite Shungite Healing Water on the first day. I continued to drink it straight - 1.5 ounces in the AM, and another 1.5 ounces in the PM. After only two days of drinking the Elite Shungite Water I was off of the oxygen machine, and I have continued this with the exact same result for 3 weeks now. I am truly a believer that this product really works.