Constant tiredness may not always be caused by stress, lack of sleep, or overwork. Researchers in Japan have found that deficiencies in important nutrients — particularly vitamin B12 and folate — could quietly contribute to persistent fatigue, low energy, and reduced motivation, even in otherwise healthy individuals. These vitamins play essential roles in brain function, red blood cell production, and energy metabolism. When levels drop too low, the body may struggle to function efficiently, leading to feelings of exhaustion and mental sluggishness. The findings highlight the importance of proper nutrition and regular health checkups in maintaining overall energy and well-being.
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