The entire process at Good Herbs takes place at room temperature. No heat is applied in the herbal extraction process.

This is tremendously significant since heat breaks down the herb and makes it less effective. Heat kills some of the active properties and the more heat used, the less the nutritional content. Cold processing takes more time. Depending upon the herb, the cold processing can take from one to three months, and it is more costly. The result, however, is a high quality product that is so much more effective.
There are cases where water extraction isn’t strong enough to pull the properties from herbs, but this is no reason to utilize toxic solvents that are commonly used and are detrimental to humans and to the environment. A combination of food-grade alcohol and quality distilled water has been proven effective over many centuries. 

Note: Glycerin is not used in Good Herbs products. It is not as good a solvent as alcohol and will not carry the active constituents into the blood as well as alcohol. Glycerin formulas require more processing than alcohol-based tinctures and important properties can be lost. Further, glycerin has a shorter shelf life...and it is the perfect medium for bacterial growth. Once a bottle is opened and the dropper exposed to air, it is easily contaminated. Alcohol-based tinctures do not have these potential problems.