What is the recommended internal dosage of oregano essential oil?

There is no established recommended internal dosage of oregano essential oil. This is because oregano oil is not recommended for internal use due to its potential toxicity and side effects. Oregano oil is highly concentrated, and taking too much of it can cause several health problems, including stomach upset, nausea, vomiting, diarrhea, kidney damage, and skin irritation. In severe cases, it can even lead to seizures, respiratory depression, and death.

Therefore, it is generally not recommended to take oregano essential oil internally, and it is always best to consult with a healthcare professional before using any essential oil internally.