Self-pressed rapeseed oil, because its technology is relatively simple compared with professional manufacturing, contains more impurities. Self-made rapeseed oil may not be able to filter out toxic substances in rapeseed oil due to the limitations of tools, practices and materials, so we should pay attention to safety issues when eating self-squeezed rapeseed oil in rural areas.
Self-squeezed rapeseed oil is generally harvested, and after simple drying and dust removal, rapeseed oil is squeezed with a squeezing tool to squeeze oil. Although the self-squeezed rapeseed oil in rural areas is pure natural and pollution-free, the squeezed oil contains impurities, which cannot be removed and purified by manual methods.