is there a good site about nutrition and its issues?

Question

I'll be very thankful if you could provide some

Answer 1

There are thousands of sites that talk about nutrition and nutritional issues. The problem is that there are so many that are selling you something and so, are biased in favor of whatever they are selling.

I recommend the health department sites. They usually have innumerable articles and are search-able. They are far more free of bias about what they are discussing.

One of the largest is the National Library of Medicine. It has articles going back to the 1950's.