Question: what are the two most important minerals needed for lactation?
Answer: Calcium. Calcium is clearly a concern because it is difficult for many lactating women to consume the RDA of 1,200 mg/day, especially if milk products are not a major part of the diet. ... 
Zinc. ... 
Magnesium. ... 
Vitamin B6. ... 
Vitamin E. ... 
Thiamin. ... 
Folate.