HEALTH NEWS   Cocoa or green tea could protect you from the negative effects of fatty foods during mental stress, study finds High cardiorespiratory fitness linked to lower risk of dementia Zinc may protect against bacterial pneumonia Breaking every hour of sedentary time with 10 mins of light exercise significantly reduced blood pressure Study: Eating more than 45% of calorie intake after 5 p.m. alters glucose levels, with serious consequences for health Going vegan could save more than $650 a year in grocery costs, finds new research