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Supplements1 mentions

Kanna (also called Zembrin or Sceletium tortuosum) is a legal over-the-counter herb that may increase serotonin and may enhance pro-social, comfort/pleasure, and gratitude-related circuitry. It is generally taken in doses of 25 to 50 mg and may be considered before a gratitude practice if safe, legal, and appropriate for the individual.

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There's a new compound that's out there, a legal over-the-counter compound... And that's a compound called Kanna, K-A-N-N-A... It is generally taken in dosages of anywhere from 25 to 50 milligrams. And it creates a kind of a pro-social gratitude enhancing, or I should say gratitude circuitry, pro-social neural circuitry enhancing effect because of the ways that it interacts with the serotonergic pathways of the brain.

huberman · The Science of Gratitude & How to Build a Gratitude Practice · Nov 22, 2021 · 1:13:59 · open ↗
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