Yes. Not only is the sugar content of those products considerably high but too much caffeine has negative side effects. They are as follows: panic attacks, dehydration, emotional fatigue and studies have shown that women who consume too much caffeine experience PMS more often than those who don't. Just keep those things in mind as you drink them. Also, it can increase your heart rate to dangerous levels as well so be careful.
Yes to both! A family member was drinking around 3 a day & ended up in the ER--his organs (liver & kidneys) started shutting down. The ER doc said those 'boosters' are the worst things for your body, especially mixed with liquor. Take caution!