Jeannette Kok + 6000m | AconcaguaOspel4/512-2-2017I did notice an effect. The first night I was not prepared for sleeping in the height tent. When installing it was said that you had to drink a lot and I hadn't done that that day. A dry mouth in the morning. I do not know if this is somewhere on the website otherwise you could state this in advance as a point for improvement. Positive effect: in the Aconcagua base camp (4200 meters) my saturation was pretty good: 88. Of the 11 fellow travelers, one was 89 and another 88, the rest were lower.