A study by the Peruvian Amazon Research Institute (IIAP) has found that using immunostimulants, including essential oils and probiotics, can improve the health of Amazonian fish cultures, leading to better growth and meat quality. Preliminary results show benefits for red-tailed shad and paiche fish. The method could be considered organic as it uses no chemicals. This research is novel in Peru, while there are three Brazilian products that offer these natural inputs industrially. The study uses commercial plants and oils such as muña, oregano, rosemary, and mint.