L Carnitine: Benefits, Side Effects, FAQ, Sources, and Dosage PCOS is complex but the right supplements can truly make a difference. When it comes to managing PCOS naturally, three supplements stand out for their science backed benefits: 1) Berberine often compared PCOS Nutrition Center L Carnitine (120 Capsules) Benefits of L Carnitine for PCOS Landys Chemist Adding L carnitine to antagonist ovarian stimulation doesn't improve the outcomes of IVF ICSI cycle in patients with polycystic ovarian syndrome: a double blind randomized clinical trial Journal of Ovarian Research Springer