I have **** ****** (words removed by The Finchley Clinic). This often results in shortness of breath (SOB), which can be a little scary at times. I take 25 drops twice a day, the main dose being bed time, I found this works very well for me. If I step-up the dose to 3 drops, I can feel a little light headed.
The effects can be felt and seen on my Oximeter, before taking '2' drops, my blood Oxygen reading was 94, after 98/99.
Great product, works well and is helping me through this difficult time ...surviving.