danno52000 Member

I've had this issue with both the fitbit and bodymediFIT...although, in both cases it was sporadic and rectified themselves after a little calibrating. I've noticed wearing it on a subway can be tricky. http://www.vitaminb12forlife.com/fitbit-flex-review

I was diagnosed w/ b12 deficiency a few years ago. I was (and am) very active (running/working out every day) in my late 20's but was sluggish all the time (despite having less than 10% bodyfat). The doctor prescribed vitaminb12 pills. When I asked why I couldn't just buy my own b12 supplements she said "because these ones…