The present invention relates to a process for obtaining durum wheat oil starting from durum wheat. further obtaining a defatted meal and durum wheat lecithin. The invention further relates to a process for obtaining flour products of defatted durum wheat germ and defatted durum wheat bran starting from said defatted meal of durum wheat. The present invention relates to a process starting from the defatted meal of durum wheat for obtaining a natural sourdough and a dried natural sourdough therefrom. A further object of the invention are the thus obtained products: durum wheat oil, defatted meal and durum wheat lecithin, flour products of defatted durum wheat germ and defatted durum wheat bran, a natural sourdough, and a dried natural sourdough.