The encouragement to take a daily multivitamin continues to be strong. However, the accumulation of data suggests strongly that daily supplementation is not necessary. The reasons for fortification of specific foods with specific nutrients starting in the early twentieth century was deliberate and with good reason. The indications for Folic acid, VItamin D, Iron and Iodine were clear and scientifically proven interventions using prevention as treatment for neural tube defects, Ricketts, iron deficiency and goiter. For these diseases the scientific connection was clear and proven. Forward to today and vitamin and micronutrient fortification is touted as a panacea and treatment for all that ails. The evidence for the addition of most supplements is weak at best. Frankly, it is without merit and almost totally baseless.
The extrapolation that since we need small quantities larger quantities will be better is short-sighted and potentially dangerous. The evidence does not support that view. The industrial production and addition of vitamins to every conceivable food item is primarily a marketing tool. It is a waste of money for consumers. If we look at nature we can see a better paradigm to extrapolate from. The concentration of vitamins and micronutrients are small and very large quantities of whole foods would need to be consumed to approach the quantities in many of the marketed items. If there is not a proven deficiency there is no need to add to our foods. The proven need is for small quantities that is more than adequately supplied by a balanced diet. The evidence for benefit beyond that is none existent.
Although, the evidence for potential harm is small we must ask the question. Will super sizing the quantities we ingest be harmful in the long run? Like with the craze for copious quantities of bottled water we have been marketed a hook and we have bitten and are drowning in a sea of misrepresentation. Improve your diet. Make fruits and vegetables the base of all meals and stop wasting your money on bottles of urine coloring.