 The study aimed to determine whether dietary fish oil, FO, and vitamin E, VE, supplementation can reduce lipid peroxidation, LP, in dog semen. Five dogs were randomly allocated into three groups, each receiving either a control diet, a diet supplemented with 54 milligrams of FO per kilogram of body weight per day, or a combination of FO and 400 milligrams of VE per day. After 60 days, semen samples were collected from each dog and divided into two halves, one exposed to peroxide and the other not. Chemiluminescence was then used to measure the amount of LP in each sample. Results showed that the addition of FO and VE reduced the amount of LP in the peroxide-exposed semen samples, suggesting that these nutrients may have a protective effect against oxidative stress in dog sperm. Further research is required to better understand how this effect occurs. This article was authored by Inalia Lorena Rishow, Francisco J. Pellegrino, Yangina Carada, and others.