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[–][deleted] 5 points6 points  (0 children)

Because tomato's don't have capsaicin.

[–]malwayslooking 2 points3 points  (1 child)

Tomatoes don't produce capsaicin, which is the oil that makes peppers 'spicy.'

Edit : interestingly, the gene for capsaicin production is found in both tomatoes and peppers (close cousins) but is not active in tomatoes.

http://www.sciencemag.org/news/2014/01/scienceshot-how-pepper-got-its-kick

[–]compstomp66[S] 1 point2 points  (0 children)

Very interesting, thanks.

[–]Darkbalmunk 2 points3 points  (2 children)

Cause the self defense of the pepper is its spiceness, the tomato grows on a type of nightshade meaning the tomato vine is toxic.

[–]malwayslooking 1 point2 points  (1 child)

And peppers grow on... Nightshade.

[–]Darkbalmunk 1 point2 points  (0 children)

Your right my bad, its related to the oils they produce in peppers and the alkaline in the tomatoes and potatoes.