It is good for health, this contains vitamins, this is extremely productive! Who has not ever said a sentence of this type to his child to motivate him to eat vegetables or for a long time prepared meal? Was it rather a try to educate his child in the nutrition? Intention is good but these sentences are not very persuasive health is a concept much too abstracted for the children. It is the same thing for the adults: we know that to use some food regularly can draw away positive effects or negative effets on the long-term health but this knowledge does not push us necessarily to action.