Which vitamin deficiency may lead to chronic fatigue and mood disorders?

Vitamin B deficiency, particularly B12 and B6, can lead to chronic fatigue and mood disorders for several reasons. B vitamins play a crucial role in energy metabolism, as they are involved in converting carbohydrates, fats, and proteins into usable energy for the body. A deficiency in these vitamins can lead to reduced energy levels and increased feelings of tiredness or fatigue.

Additionally, B vitamins, especially B12 and folate, are vital for the proper functioning of the nervous system. They support the production of neurotransmitters, which are essential for regulating mood. Low levels of these vitamins can impair neurotransmitter function, potentially leading to mood disorders such as depression and anxiety.

In contrast, deficiencies in vitamins E and C primarily affect the body's antioxidant capacity and immune function, and while Vitamin D is important for overall health and bone integrity, it is less directly associated with mood and energy compared to the B vitamins. Therefore, focusing on B vitamins is crucial when considering the link between vitamin deficiencies and symptoms like chronic fatigue and mood disorders.