Feeling tired during work can stem from several factors, including poor sleep, stress, dehydration, or nutritional deficiencies. Before taking any supplement, I recommend consulting a doctor for basic blood tests to check your Vitamin D, B12, iron, and thyroid levels, as targeted supplementation is most effective. In the meantime, focus on key lifestyle habits: aim for 7-8 hours of quality sleep, stay well-hydrated, eat balanced meals, and take short breaks to stretch. Avoid relying on excess caffeine, which can cause energy crashes. If fatigue persists despite these adjustments, a medical evaluation is important to rule out underlying conditions.