The expression of most life history traits, such as immunity, growth and the development of sexual signals, is negatively affected by high levels of oxidative stress. Dietary antioxidants can reduce oxidative stress and have therefore been the focus of numerous studies in behavioural and evolutionary ecology in the last few decades.
Catoni, C., Peters, A., & Schaefer, M. (2008). Life history trade-offs are influenced by the diversity, availability and interactions of dietary antioxidants. Animal Behaviour, 76, 1107 - 1119. https://doi.org/10.1016/j.anbehav.2008.05.027