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Old 14th November 2005   #4 (permalink)
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Worms are almost certainly not affected by caffeine. In fact, humans may be the only species that IS affected by caffeine. I believe that it affects us due to some genetic defect in our uric acid metabolism, but I may have this all wrong. Virtually any plant material that you use will contain SOME weird chemical. We humans are fixated on caffeine because it has an obvious effect on us, but plants of all kinds are chock full of chemicals with various activities.

In other words, I wouldn't worry about it.
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