I had a COPD episode and my osat dropped to 88. I had a job coming up and had to fly. I ordered the breathe drops before I left. When I returned home I was ready to go to urgent care. The drops had arrived and I took my first dose. 8 hrs later my osat was 94. Coincidence maybe. 1 week later my osat is 96 with spikes to 98. I'm still wondering if the drops are what has caused my turn around. I'll update you all in a month. Sorry to be so sceptical.