How much B6 is safe? What to know about the supplement found in energy drinks​How much B6 is safe? What to know about the supplement found in energy drinks 

 There’s growing awareness of rare, but potentially serious side effects from mega doses of vitamin B6, a nutrient found in supplements and energy drinks.  ​​There’s growing awareness of rare, but potentially serious side effects from mega doses of vitamin B6, a nutrient found in supplements and energy drinks.