I set out to make this post as a reference but as I kept going, I realized how CRAZY it can be to supplement just one nutrient. You can create so many different imbalances with just one isolated mineral or vitamin. It reminds me of that "Pharma" shirt meme that goes around: 'I take this drug for this illness, and I take that drug for the side effects of the first drug." Isolating nutrients is very allopathic in my eyes, especially when most people have around a dozen deficiencies and imbalances.