Is HDL useful for fatigue?

The question of whether HDL (high-density lipoprotein) is useful for fatigue cannot be answered with strong evidence. HDL is commonly known as 'good cholesterol' because it helps remove excess cholesterol from cells and protects against cardiovascular disease. However, a direct causal link between HDL levels and fatigue is not established. Some observational studies suggest that low HDL may be associated with chronic inflammatory states or metabolic syndrome, which can contribute to fatigue. Yet these are indirect associations, heavily confounded by lifestyle factors such as diet, exercise, and sleep. Importantly, clinical trials that raise HDL pharmacologically have not shown improvements in fatigue or other outcomes. For individuals experiencing fatigue, a comprehensive medical workup (including blood count, inflammation markers, thyroid function, iron status) is more informative than focusing solely on HDL. Therefore, the evidence is insufficient to recommend targeting HDL specifically for fatigue relief.