It's Elemental My Dear Body

From sciencebase.com:

"Ever felt like you weren't in your element? Well...take a look at the elements in you!
Ca - Calcium, C - Carbon, Cl - Chlorine, H - Hydrogen, I - Iodine, Fe - Iron, Mg - Magnesium, Mn - Manganese, N - Nitrogen, O - Oxygen, P - Phosphorus, K - Potassium, Na - Sodium, S - Sulphur, Zn - Zinc and trace amounts of cobalt, chromium, copper and selenium, and a few others."