Up here in Mammoth with my cycling club and I just realized that I may not have brought enough altitude antidotes for my 21 ride partners :-(. When hiking Mt. Whitney, the people I hiked with would begin to get headaches and I would give them a great source of antioxidants from Standard Process called Cataplex ACP. It would eliminate their headache’s virtually immediately. Then on the way down, there was a gal shaking profusely on the side of the trail, suffering from altitude sickness. I gave her 4 to chew up. It was most incredible to see her immediately stand up and return to hiking. There are other good sources of antioxidants A and C, but the ACP product is the one I have seen work the best.