A meta-analysis of quantitative data extracted from selected peer-reviewed articles describing in vivo studies of enteric methane emissions of dairy cattle treated with feed additives compared to a control group. The aim was to identify feed additives that significantly reduce enteric methane emissions, expressed in g/day, g/kg dry matter intake, g/kg milk product and g/kg of energy-corrected milk. The feed additives considered were polyunsaturated fatty acids (PUFAs), 3-nitrooxypropanol (3-NOP), essential oils (EO) and monensin. The study was published on February 19th of 2026, in Frontiers of Animal Science, Animal Nutrition section (doi:10.3389/fanim.2025.1754069)