Micro-nutrients have limitations of being helpful or wrong, antagonistic combinations that do not work with each other. Micro nutrients have inter nutrient interactions. High doses do not deliver higher benefit but can reverse the benefits..one multivitamins capsule having all the nutrients together does not work. The nutrients are dumped on cells but cannot be utilised. also correcting single nutrient deficiencies as only iron supplement or only calcium or only omega3 does not work. The nutrients depends on each other for complete benefit. A balanced use of nutrients is essential instead of the common need based unorganised as and when required, approach.