The results of the chemical investigations of variously treated acorn samples are presented in this paper with the aim of obtaining data on the amount of nutritious components and biologically active substances. The Quercus robur acorn, which belongs to the Fagaceae family, was investigated in a raw, thermally treated form and as an extract that was subsequently dried in a dryer with a fluidized bed.

This work investigates different extraction techniques by utilizing 95% ethanol and refined sunflower oil as well as the effects of thermal pretreatments on the extraction of antioxidants from oak acorns. Experiments were conducted using oak acorn from Quercus cerris and Quercus robur. Peroxide values measurements and TBA test were used for oxidation rate monitoring.