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Due to a lack of research, no specific dosage guidelines for wormwood exist.
At the same time, various governmental institutions have placed restrictions on wormwood products, as its compounds can produce toxic effects.
For instance, the European Union (EU) limits foods prepared with wormwood to 0.23 mg of thujone per pound (0.5 mg/kg), while the threshold for alcoholic beverages like absinthe is 16 mg per pound (35 mg/kg).
In the United States, the Food and Drug Administration (FDA) restricts any commercial product containing thujone to 10 parts per million (ppm) or less. This amount is considered negligible and thus safe for most populations.
Keep in mind that wormwood tea and extracts aren’t regulated by the FDA. Thus, they don’t fall under these regulations and harbor significantly more thujone.
If you’re unsure how much to take, it’s best to speak to your medical provider. *