overworked office worker walking by business center burnout at work avitaminosis

african afroamerican american avitaminosis broken burnout businessman deadline deficiency depressed depression desperate difficulty disease dismissal emotional employee exhausted exhaustion fatigue fired frustration hardworking headache inefficient man manager miserable office overhours overloaded overtime overworked person pressure routine sleepy stress stressed stressful tension tired tiredness unproductive upset vitamin walking work workaholic worker