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Aristolochic acid I induced autophagy extenuates cell apoptosis via ERK 1/2 pathway in renal tubular epithelial cells

Disturbance in mitochondrial function may also contribute to or cause the fatigue seen in ME/CFS [102] and long-COVID [108]

So yes, your body makes it on its own

In this study, the congenital hypothyroid patients had significantly higher levels of plasma TG, and the finding was supported by other studies [3638]