Allicin (Diallyl Thiosulfinate), the main biologically active component of the freshly crushed garlic extracts, possesses various biological activities including antibacterial, antifungal and antiparasitic effects., Allicin (Diallyl Thiosulfinate), the main biologically active component of the freshly crushed garlic extracts, possesses various biological activities including antibacterial, antifungal and antiparasitic effects.