should you take l carnitine on an empty stomach Lean Body Mass Supplement for Strength & Recovery MusclePharm L-Carnitine 3000 by MusclePharm:

Tolerance should be monitored very closely during the first week of administration, and after any dosage increases

Boehm G, Stahl B

Ketone Bodies During periods of fasting and some other physiological conditions, water-soluble molecules that may contain a ketone group, such as acetoacetate, hydroxybutyrate, and the spontaneous breakdown product of acetoacetate, acetone, are produced from acetyl-coA by the liver after oxidation of fatty acids

No existen restricciones para su consumo durante el embarazo y la lactancia, ya que esta es una sustancia natural, cuya demanda se incrementa durante el embarazo y adems, forma parte de la leche humana