Uyu ni umuyoboro wuzuye wo kwisiga wakozwe mubikoresho byiza byo mu rwego rwo hejuru, ushobora gukoreshwa mukuzuza impumuro nziza, imiti yica imibu, nibindi. Kuberako ubushobozi bwayo ari buto, 5-6g gusa, birakwiriye cyane kubipakira.Imiyoboro ntoya kandi ishobora kworoha kuyisukura, irashobora gukoreshwa, kandi irashobora gutwarwa nijwi, niyo iguruka.