effects of taking l carnitine A randomized, double-blind, placebo-controlled trial published in Endocrine Journal (2016) evaluated the L-carnitine supplementation (990 mg twice daily for 12 weeks) in hypothyroid patients who continued to experience symptoms despite L-Carnitine Side Effects & Safety:

Mario G, Niso-Santano M, Baehrecke EH, Kroemer G

Supplement Facts: Serving Size: 1 ml Servings Per Container: 30 Amount Per Serving: Maitake Mushroom Extract (Grifola frondosa) DER 10:1: 300 mg *RI - Reference Intake Ingredients: Maitake mushroom extract (Grifola frondosa) DER 10:1, water, humectant: glycerol

In another study, the protective effect of L-Carnitine on Sertoli cells in the testes against chemotherapy-induced damage was investigated in healthy male adult Kunming mice

Protein samples (20 g) were separated on NuPage Novex 4%12% Bis-Tris gels (Life Technologies, Carlsbad, CA, USA), then transferred to PVDF membranes (Rockford, IL, USA), which were blocked with non-fat milk and incubated with primary antibodies (OXPHOS complexes

This is probably because its absorbed from the fruits and vegetables the nursing parent eats