Question: what vitamins and minerals are we most deficient in?
Answer: Iron deficiency. Iron is an essential mineral. ... 
Iodine deficiency. Iodine is an essential mineral for normal thyroid function and the production of thyroid hormones ( 8 ). ... 
Vitamin D deficiency. ... 
Vitamin B12 deficiency. ... 
Calcium deficiency. ... 
Vitamin A deficiency. ... 
Magnesium deficiency.