1) Organic disulfide 
Allithiamine (INN), or thiamine allyl disulfide (TAD), is a lipid-soluble form of vitamin B1 which occurs naturally in garlic. It is more bioavailable than the water-soluble form of vitamin B1, thiamine, and is the preferred form to be taken in case of a vitamin deficiency.{Fact|date=March 2009} == See also == ...