Boyali, Ekrem2020-03-262020-03-2620160973-5070https://hdl.handle.net/20.500.12395/33492This study aims to investigate the effects of vitamin A supplementation on cytokine release in 10 male elite taekwondo players. The subjects who were supplemented with 100 mg of vitamin A in daily tablet form for 4 weeks were exercised to exhaustion twice, before and after the supplementation. In the course of the four week study period, blood samples were collected from the subjects four times in exhaustion and at rest, before and after supplementation. The blood samples were analyzed for IFN gamma, TNF-alpha, IL-2, and IL-6 levels. Vitamin A supplementation resulted in a significant increase in serum IL-2 levels (p<0.05). However, vitamin A supplementation led to the inhibition of serum TNF-a levels, in comparison to pre-supplementation (exhaustion and resting) values (p<0.05). The results of the study indicate that vitamin A supplementation might cause changes in the release of cytokines independent of exercise.eninfo:eu-repo/semantics/closedAccessVitamin ACytokinesExerciseFatigueTaekwondoArticle1015358WOS:000373654300008N/A