Natural Factors - Organic Oregano Oil - 60 Millilitre(s) - NPN: 80033657 -- Oil of Oregano is a potent herbal antimicrobial that effectively tackles bacterial, yeast, fungal, and parasitic infections. It offers powerful antioxidant protection and immune system support, and helps relieve various respiratory conditions. Natural Factors Organic Oil of Oregano is derived from wild-crafted Origanum vulgare using gentle steam distillation to ensure purity.