Hello Luluel,
the mass publicity within mainstream media concerning the ineffectiveness and "dangers" of vitamins & minerals, originates from the Pharmaceutical Companies, who wish to denigrate their competition, which nutritionals just happen to be.
The media are pharma' dominated, so you cannot expect to receive any reliable or truthful information via them.
Fasting will vastly improve the digestion and assimilation of food, and supplements are no exception. Many people believe however, that supplementation is not necessary with an organic and wholefood diet, but my own health and energy levels have been much improved by quality "wholefood supplements".
The only supplements I would try & avoid are the synthetic vitamins, where most are of little to no value whatsoever.