Coffee has a high level of antioxidants which can fight free radicals in your body. However because it is a diuretic there are some studies that indicate  some links with dehydration. This especially the case when the individual’s coffee consumption is spasmodic or the coffee’s caffeine level is higher than moderate. The are some reports that show that caffeine which is the key psychoactive substance in coffee and tea may (which may help you stay alert and aid performance), may reduce the effectiveness of some nutrients in our body systems. See our blog article on Plant Based Coffee Boosters.