Our body is exposed to agents that can cause / predispose our body to various disorders both internally and externally from conception to death. The exogenous sources of these agents include: air, water, diet, drugs, and radiation while the internal or endogenous source include processes like inflammation, lipid peroxidation, oxidative stress, existing diseases, infections, and gut flora. These agents are said to be major determinants of chronic diseases like cancer and were studied poorly due to lack of proper methodology especially to study the body response and the variation in the population to exposure to these agents. But the developments in the field of omics have opened up new ways of looking into this complex unresolved problem. Simply Exposome is the comprehensive measurement of all exposure events (exogenous and endogenous) from conception to death.
The CDC (centre for disease control and prevention) defines exposome as
