Oregano oil supplements contain oil from the oregano plant, rich in compounds such as carvacrol and thymol, and they come as softgels, capsules and liquid drops. They are popular as a traditional herbal remedy, but scientific evidence for most health claims is limited, so the first decision is whether you want it after talking to a doctor, especially if you take medicines or are pregnant.
Form is the next question. Softgels and capsules contain oregano oil diluted in a carrier oil and are easy to swallow, while liquid drops are concentrated, taste very strong and must be diluted, since undiluted oregano oil can burn the mouth and skin. Among the 5 products that list item volume, most fall between 1 and 3.9 fl oz, and 1 fl oz is typical.
Strength and labelling come next. Products vary in the percentage of carvacrol and the amount of oil per serving, and labels are often hard to compare, so look for a clear statement of oil amount and active compounds. Independent testing gives some assurance of what is in the bottle.
Side effects and interactions matter. Oregano oil can upset the stomach, and people allergic to plants in the mint family may react to it. It may interact with blood thinners and some other medicines.
Before buying, check the form, the oil and carvacrol content per serving, the carrier oil, the number of servings, the instructions for dilution and the warnings on the label. Keep essential oils away from children and pets, and do not use oregano oil as a replacement for medical treatment. Oregano oil supplements are different from the culinary herb and from oregano essential oil sold for aromatherapy, which is not meant to be swallowed. Read the label to be sure the product is intended for internal use, and follow the stated serving size.
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