This is North American Herb & Spice's Oreganol wild oregano oil in a smaller .45oz bottle, easy to toss in a bag or keep at the office. It's prized for its naturally high carvacrol content and long history of traditional immune support, taken as a few drops under the tongue or in water at the first sign of feeling run down. It's potent and spicy, so start small, and avoid it if you're pregnant or have a plant/mint-family allergy.