According to The National Center for Biotechnology Information (NCBI), approximately 1011 cells die in the body of each adult each day and the same amount is replaced by the new cells. As a matter of fact, the mass of cells we lose each year through the cell death process is close to our entire body weight. What does that information give us?
ELEMENT COMPOSITION OF THE HUMAN BODY
The mass of the body is composed of different chemical elements:
98.7% of them are the next six: oxygen (O), carbon (C), hydrogen (H), nitrogen (N), calcium (Ca), and phosphorus (P).
1.2% is made up of another five components: potassium (K), sulfur (S), sodium (Na), chlorine (Cl), and magnesium (Mg). These 11 are necessary for life. It is a scientifically proven fact.
The remaining 0.1% are trace elements. It is also proven that more than a dozen of them are necessary for human life too. Among them are boron (B), chromium (Cr), cobalt (Co), fluorine (F), iodine (I), copper (Cu), iron (Fe), manganese (Mn), molybdenum (Mo), zinc (Zn), selenium (Se), tin (Sn) and vanadium (V).
CHEMICAL COMPOSITION OF THE HUMAN BODY
The composition of our body also can be described in terms of chemicals as the set of:
water, proteins (present at connective tissue and hair and so on), fats, hydroxyapatite (present at teeth and bones), carbohydrates, DNA and RNA, dissolved inorganics such as sodium, potassium, chloride and phosphate, different gases, organics including amino acids and fatty acids, and vitamins.