l carnitine levels L-Carnitine this product seems to be well L-Carnitine Tartrate Amino Acid 1,500

Renal tubular reabsorption is remarkably efficient, with over ninety percent of filtered carnitine being reclaimed, resulting in minimal urinary losses under normal physiological conditions

References Ceccarelli G, Brenchley JM, Cavallari EN, Scheri GC, Fratino M, Pinacchio C, et al

You can find this nutrient in foods such as meat, fish, and dairy products

Prediagnostic serum inflammatory markers in relation to breast cancer risk, severity at diagnosis and survival in breast cancer patients

2015 (6), CD000219

Pharmaceutical inhibitors like finasteride block both types systemically, which explains their effectiveness but also their side effect profile