Can ApoB help with fatigue?

ApoB (Apolipoprotein B) is a protein component of LDL and VLDL particles and is primarily used as a marker for cardiovascular risk. There is no robust scientific evidence that ApoB directly relates to fatigue or tiredness. Fatigue is typically caused by factors such as iron deficiency, vitamin D or B12 deficiency, thyroid dysfunction, poor sleep, or chronic stress. Some commercial tests market ApoB in the context of 'energy metabolism,' but this is not supported by clinical studies. Measuring ApoB can be useful for assessing heart disease risk, but not for evaluating fatigue. If you experience persistent fatigue, consult a doctor for proper workup (CBC, ferritin, vitamin B12, TSH, inflammatory markers). Relying on ApoB testing for fatigue is misleading and may delay diagnosis of the real underlying issue.