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 Kale doesn't. 
 "Chlorophyll’s detoxifying properties may aid in the elimination of these harmful substances, reducing their impact on brain health and potentially preventing or delaying neurodegenerative conditions. Moreover, chlorophyll-rich foods have been associated with improved cognitive function and brain health."

We never discuss the brain with these food topics, only a myopic lens is used.

I think growing your own greens is a nice venture, I'm about to start that journey this year. 
 I think the body (and the brain) has no nutritional requirement whatsoever for chlorophyll. and whatever you are ingesting that chlorophyll would help detoxify, maybe you should start by not eating those either. 
 I think it does in conjunction with other things I'm greens, 

Not saying to eat as a main source of energy. 

Or to get it from a supermarket.