Since, the induction of lipid oxidation is time-pressure dependent we chose 800 MPa for 10 min as a worst case scenario in order to induce lipid oxidation. After pressurisation, the samples were stored cold (5 C) in the dark and two meat patties (for each meat type and packaging type) were taken for analysis at days 1, 3, 7, 11, 14, and 25. The meat patties were taken at the respective day and the surface (S) and the inner part (I) were divided using a knife. The surface part was approximately 0.5 cm thick. The surface part and the inner part were weighed upon sampling and amounted to 44.1 ± 3.3% and 55.9 ± 3.3%, respectively.