Nothing ...: The amount of charcoal that might have been ingested from residue on your finger that got in a smoothie that has since been spit out (!) should be insignificant. I wouldn't worry about it. Good wishes:)
Answered 10/7/2016
2.7k views
No worries: Sounds like a very small amount and is not toxic in any case.
Answered 4/3/2017
742 views
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