It is very simple to explain you; normal people know lot about food which they like and enjoy.

But the relationship among food, environmental poisons, detoxification, free radical scavenging and metabolism are not understood by all. If you have all the information about a person, you make an individual food plan which belongs to him only. The other person has a different combination of these factors and so what is good for you is not good for him and vice versa. That is the reason why the recommendations are contradictory and you should not compare two diet plans.

Eat this, do not eat that is easy to tell, but you must be always in a position to explain what you do and what you mean and why. Then there will be no understanding problems.