Lick This
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Death by Licorice...
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" researchers say "a daily intake of 10 mg glycyrrhizic acid would represent a safe dose for most healthy adults," which could equate to about 5 grams of the candies."
That's about 1/5 of an ounce.
I found this at Walgreens:
So the "safe dose" according to these guys is ½ of a twist.