l-carnitine-rich foods L-Carnitine Benefits, Uses, Dosage, Foods, Side Effects helps convert fat into energy Now Foods L-Carnitine 500 mg

P., Waters, P

The exclusion criteria were: severe or chronic skin inflammation, serious inner or chronic diseases, intake of drugs that can possibly interfere with skin reactions, application of pharmaceutical or skin care products with active ingredients until 10 days before testing, allergies or severe side effects after usage of cosmetic products, sunbath or usage of tanning bed during the study period, known cancer, pregnancy or lactation period, taking of medication with potential effect on hair growth

doi: 10.1109/IEMBS.2008.4649165

This is primarily due to L-carnitines ability to preserve muscle glycogen and use fatty acids as energy during exercise, sparing the use of amino acids, making them available for new protein synthesis to rebuild and grow muscle, per 2020 research in Molecules