Good morning Bluegrasspv2018……I take 500mg five days a week, originally I took 7 but was reduced because of extreme fatigue. It seem to have helped but I still am fatigued more than I would like to be. Every day is a struggle and I usually have to go to bed early, sometimes in the afternoon but I deal with it accordingly. Good luck to you from Ontario, Canada………land of snow and ice, lol………Claire