&quot;we believe that the case is closed—
supplementing the diet of well-nourished adults with
(most) mineral or vitamin supplements has no clear benefit
and might even be harmful. These vitamins should not be
used for chronic disease prevention. Enough is enough.&quot;<p>The problem is that (specifically in US) most adults are very far from being well-nourished.<p>For example, <a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Malnutrition" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Malnutrition</a>
&quot;Overnutrition caused by overeating is also a form of malnutrition. In the United States, more than half of all adults are now overweight — a condition that, like hunger, increases susceptibility to disease and disability, reduces worker productivity, and lowers life expectancy.[51] Overeating is much more common in the United States, where for the majority of people, access to food is not an issue. Many parts of the world have access to a surplus of non-nutritious food, in addition to increased sedentary lifestyles. Yale psychologist Kelly Brownell calls this a &quot;toxic food environment” where fat and sugar laden foods have taken precedent over healthy nutritious foods.&quot;