GMAT Critical Reasoning (CR) | Re: Columnist: People should avoid using a certain artificial

According to me, the conclusion in this argument is:People should avoid using a certain artificial fat that has been touted as a resource for those whose medical advisers have advised them to reduce their fat intake

And it absorbs certain essential vitamins, thereby preventing them from being used by the body. - is the premise which is helping the conclusion.

According to my understanding, in evaluate questions, the answer should affect the conclusion. Could you explain how A affects the conclusion
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