I am curious whether or not coffee is playing a positive or negative role in my life with health and fitness. I've been drinking one cup of black coffee every day for years. I've heard the positive argument for coffee such as the antioxidants and possibly helping against disease. I also have heard the negative arguments about its affects on your so called Adrenal Health and Circadian Rhythms, although I work shift work (constantly switching from nights to days and weekends to weekdays) so I am not sure if coffee can be a negative impact on those parts of my health? I appreciate any good feedback?