The concurrent reductions in serum triiodothyronine (T3), thyroxine (T4), thyrotropin-releasing hormone (TRH), free fatty acids (FFA), lipoprotein lipase (LPL), and nitric oxide (NO) levels are consistent with the hallmark metabolic depression and energy deficit characteristic of Kidney Yang Deficiency (KYD). Here, LPL is linked to depressive symptom measurement.