From the article:
inadequate dietary Mg is prevalent in America and is the most likely cause.
It contains zero qualifiers suggesting it is one of many factors, a major factor among many, etc. It uses the word "the" and the singular form of "cause."
inadequate dietary Mg is prevalent in America and is the most likely cause.
It contains zero qualifiers suggesting it is one of many factors, a major factor among many, etc. It uses the word "the" and the singular form of "cause."
At best, I could say something like "Given the proven widespread lack of adequate dietary magnesium and the known side effects of magnesium insufficiency, it seems plausible to suggest that at least some portion of the increase in depression is due to widespread magnesium deficiency."
That may seem like quibbling to you, but scientists get paid to quibble about the details and to be as precise as humanly possible. They should be meeting at least as high a standard as my generally low paid freelance writing.