When searching for the best oregano oil, several factors come into play to ensure you're getting a high-quality product. Firstly, check for purity and potency—opt for organic oregano oil without additives or fillers. Look for a high carvacrol content, as this compound is associated with the oil's beneficial properties. Additionally, consider the extraction method; steam-distilled oregano oil is often preferred for maintaining potency. Brands like "Now Foods" and "Nature's Way" are reputable choices known for their quality oregano oil products. Finally, reading customer reviews and checking for third-party testing can provide further assurance of the oil's quality and efficacy.