Effects of Feeding Coenzyme Q10-Ubiquinol on Plasma Coenzyme Q10 Concentrations and Semen Quality in Stallions

Although coenzyme Q10 (CoQ10) serves as an antioxidant and energy source for spermatozoa when added to stallion semen before cooling or freezing, the effects of feeding CoQ10 on quality have not been studied. We assessed daily oral ingestion CoQ10-ubiquinol by stallions their plasma concentrations quality. Seven mature Andalusian ate 1g ubiquinol/day 4 weeks followed a 4-week washout period. Four horses initially completed additional control period without ubiquinol. Blood was sampled weekly determination concentrations. Ejaculates were collected every two total motility (TM), progressive (PM), viability (V) after 24hours (T1), immediate cryopreservation (T2), (T3). Ingesting ubiquinol resulted in increase concentration (P < .001). Two improved V with all treatments (T1: P = .007; T2: .05; T3: .01) PM T3 .04). In five stallions, TM also T1 .01 .02, respectively) increased T2 .03). Overall, parameters within first 2 supplementation, plateaued at end supplementation persisted discontinuing until sampling (8 weeks). Feeding 1 g breeding freezing 5 7 stallions. This could be important improving reproductive efficiency