The conventional approach to nutrition is that collectively we require similar nutrients on a daily basis and optimum health can be achieved if you stay within these guidelines. However, this uniform approach does not take into account our unique characteristics.
Like fingerprints, we each have biochemical differences that determine who we are and how we interact within our internal and external environments. Biochemical individuality is a combination of our genes, how our environment has shaped the expression of them and ultimately how this affects our nutritional needs.
We cannot assume that everyone will absorb, utilise, metabolise and excrete nutrients in the same way, and with perfect efficiency. This explains the wide response to nutrition; why the one-size-fits-all approach cannot work for everyone, and how our life-cycle and changes may affect our nutritional needs over time.