Dad is 88 with Afib, hypertention and bad leg veins. Mom is 88 with Post Stroke Parkinsons, a bad heart and afib. Dad has decided that she needs more energy and is giving her Reb Bull Energy drink. The only thing I know about Red Bull is it is full of caffeine and makes my grandsons wild when they get ahold of it. Does anyone have info on if this would be good or bad for Mom and Dad?