1 Each additional ounce will cost $0.22 (up one cent from 2014). 2  Postcard rates will increase by one cent to $0.35 from $0.34. 3  Media Mail will see an increase of 6.2% in 2015. 4  Rates will start at $2.72 (1 lb.), up $0.03 compared to 2014.
Vitamins and minerals are nutrients that the body requires to function properly. Vitamins can be fat-soluble or water-soluble. The fat-soluble vitamins are vitamins A, D, E, and K. Fat-soluble vitamins dissolve in fat and are stored in the body.
Some vitamins should not be taken together. Some interactions between vitamins may lead to its poor absorption. For instance, iron supplements do not go together well with zinc and may also interfere with absorption of vitamin E. Calcium impedes the absorption of iron that's why they should not be taken together.