How do I know what my max threshold is?

SMF

I would like to set my nutrient max thresholds, but having trouble researching what the correct values are...is this the same as daily tolerable upper limit ?

Karen_Cronometer

Yep! By default the maximum targets in Cronometer are the tolerable upper limits for nutrients that have them. You can find them summarized here: https://www.nap.edu/read/25353/chapter/28#574