Diallyl disulfide (
DADS or
4,5-dithia-1,7-octadiene) is an
organosulfur compound derived from
garlic and a few other genus
Allium plants. Along with diallyl trisulfide and diallyl tetrasulfide, it is one of the principal components of the
distilled oil of
garlic. It is a yellowish liquid which is insoluble in water and has a strong garlic odor. It is produced during the decomposition of
allicin, which is released upon crushing
garlic and other plants of the
Alliaceae family. Diallyl disulfide has many of the health benefits of garlic, but it is also an
allergen causing
garlic allergy. Highly diluted, it is used as a flavoring in
food. It decomposes in the human body into other compounds such as
allyl methyl sulfide.