Hormone Therapy for the Primary Prevention of Chronic Conditions in Postmenopausal Persons: Updated Evidence Report and Systematic Review for the US Preventive Services Task Force
By improving HRV, L-carnitine helps shift the autonomic nervous system out of chronic sympathetic overdrive (the "fight or flight" state) and enhances parasympathetic vagal tone (the "rest and digest" state), promoting a calmer, more regulated nervous system response to physical stressors
Winter SC, Szabo-Aczel S, Curry CJ, Hutchinson HT, Hogue R, Shug A
Medications that are metabolized by CYP2E1 include the hypertension drug propranolol, the anticoagulant warfarin, and the sedative diazepam
Tyrosine is an amino acid involved in thyroid hormone production