Does oregano oil cure infections?

There is no good human trial evidence that it does. Carvacrol kills bacteria and fungi in a dish, which is not the same as treating an infection in a body. Use oregano as food and see a doctor for infections.

Why is dried stronger than fresh?

Drying concentrates the oils and changes them slightly. Oregano is one of the few herbs where the dried jar beats the fresh bunch for cooking.

Is oregano the same as marjoram?

They are close cousins. Marjoram is sweeter and softer; oregano is sharper and more peppery. Persian marzeh is a related but distinct savory.

Chapter 1 of 9

Oregano

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Carvacrol and thymol are strong antimicrobials in the laboratory. That is not proof they cure infections in people.

Dried oregano is stronger than fresh — the opposite of most soft herbs.

It is one of the highest-antioxidant culinary herbs.

Oregano oil is concentrated and can irritate the gut and mouth. Dilute it and do not take it for long stretches.