Chewing different materials affects the brain and a new study found that chewing on wood (wooden tongue depressors), compared to chewing gum, led to a significant increase in a natural brain antioxidant called glutathione, and better performance on memory tasks.

[u/mvea]

https://www.psypost.org/chewing-wood-may-boost-memory-and-brain-antioxidants-study-finds/

[u/samsaruhhh]

It's not difficult to overdose on licorice if I'm remembering correctly, it can raise blood pressure, lower potassium levels, affect heart rhythms among other things..

[u/istara → u/samsaruhhh]

Also to be avoided in pregnancy and breastfeeding.