by 
Thommy
ANSWERS: 3
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None that I know of. However, this might depend on the herb and the tea, and the company processing them.
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None, as per the other answer, solvents would olny be used to get extracts from the tea leaves. In the case of herbal teas, if they use an oil (like orange) oil, then a solvent may have been used to extract the orange oil. There are many different solvents, so it would be hard to say what would be used. Hot water extraction is one method used to extract essences, and alcohol is also used. Too many variables for an accurate answer, sorry
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Grow yur own herbs then steep them and you got yur tea. No added anything.
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