Sabuntawa. Hukumar E da Hukumar Kiwon Lafiya ta Duniya sun yarda cewa iri da ɓoyayyen launin shuɗi mai launin shuɗi suna ba da taimako daga maƙarƙashiya; inganta peristalsis (motsi na narkewar abinci) da tsarin kujera (mai taushi), musamman a cikin marasa lafiya da tsutsa ta dubura.