What are the differences between alcohol-, water and oil-based extractions of medicinal herbs?
Most chemicals can be dissolved in one of those solvents. Vitamin C is soluble in water, Vitamin A and E are soluble in oil and vanilla is soluble in alcohol. By treating a plant with one of these solvents you will extract different substances. If you attempt to extract vanilla by dissolving the bean in water you will not get the results you desire. In attempting to extract an active substance from an herb, the scientist needs to know what solvent will work on the substance and then uses the appropriate solvent to accomplish the task.