 Nanotechnology has shown promise in many fields, including agriculture. This study examined the effectiveness of copper nanoparticles, CUNPs, in increasing the content of bioactive compounds in tomatoes. The results indicated that CUNPs can increase the levels of vitamin C, lycopene, and antioxidants in tomatoes. Additionally, the application of CUNPs decreased the activity of certain enzymes involved in oxidative stress, suggesting that these particles may be useful for improving the nutritional value of food crops. This article was authored by Elsie Rubisila Lopez Vargas, Ortencia Ortega Ortiz, Gregorio Cadenas Pliego, and others.