Curious Cook: Negative nutrition, part 2

Spinach contains oxalate which binds to calcium. Once cooked, this problem is solved though. — J HOWELL/Pexels

We now focus on a common issue seldom highlighted by suppliers of multivitamins and mineral supplements. It is the subject of nutrient conflicts, where nutrient absorption are impaired by one or more other nutrients.

Many people would assume that a multivitamin/multimineral pill will simply deliver all the required nutrients in a simple, convenient format. But this is not always true. Curiously, it is feasible to suffer significant deficiencies in certain nutrients even while supplementing with the same nutrients.