Busetto GM, et al. - Authors probed the impact of 6 months of supplementation with l-carnitine, acetyl-l-carnitine and other micronutrients on sperm quality in patients with oligo- and/or astheno- and/or teratozoospermia with or without varicocele. A significant increase in the total sperm count in the supplemented group vs the placebo group was noted. In supplemented patients, both, progressive and total motility were higher. All these changes were more evident in varicocele patients. Findings suggested the effectiveness of supplementation with metabolic and antioxidant compounds when included in strategies to improve fertility.