Black Friday: lifetime access is on a special offer in the app, until November 30. Black Friday: special offer on lifetime access, until November 30. Download
락타아제가 부족하면 유당을 소화할 수 없습니다.laktahje-ga bujokhamyeon yudang-eul sohwahal su eobs-seubnida.If there is a deficiency of lactase, lactose cannot be digested.