I tested this recovery drink as I was doing a 150 mile run though the Sahara Desert. After an average run of about 20-24 miles through a very hot climate I was ready to drop at the end of the run. After taking the recovery drink I was walking around fine. It would take about 15 - 20 minutes to take effect. It is well recommended. I had the cherry flavor and it also was not bad tasting. This should only be taken after and not during the run.