l-carnitine cardiovascular benefits L-Tartrate: 8 Key Didn't another study show carnitine

Nicolas S, Blasco H, Bigot A, et al

Jul 1 2019;8(4):568-579

Taking L-lysine is considered safe

Thus, if a patient with a normal TSH presents with symptoms consistent with hypothyroidism, including fatigue, weight gain, depression, cold extremities, muscle aches, headaches, decreased libido, weakness, cold intolerance, water retention or PMS, a combination of both clinical and laboratory assessment should be used to determine the likely overall thyroid status and if a therapeutic trial of straight T3 or a T4/T3 combination is indicated

A General Introduction to the Biochemistry of Mitochondrial Fatty Acid -oxidation