Abstract
Objective: In this study we aimed to evaluate the effects of
casein and whey protein supplementation on examination
stress. We have investigated different parameters of oxidative
stress and immune function.
Materials and Methods: The participants were divided
into three groups: control, casein and whey. Casein and whey
groups were supplemented with either casein or whey protein
for 15 days. Blood samples were obtained at the beginning of
the study (Day 0), on the examination day (Day 16) and five
days after the examination (Day 21). Antioxidant capacity,
glutathione, cortisol and cytokine levels (TNF-a, IL-6, IL-12)
were measured.
Results: An increase in antioxidant capacity and glutathione
levels of the participants using whey protein was observed.
Whey protein supplementation did not affect cortisol levels, but
participants taking whey protein showed an increase in serum
TNF-a and IL-6 levels.
Conclusion: It is suggested that the use of whey protein
strengthens the response to oxidative stress by increasing
antioxidant capacity and glutathione levels, while supporting
the immune system via cytokine release.