I've seen a few papers that show there are micronutrient deficiencies in people who are overweight/obese. This paper shows that overweight subjects had zinc deficiencies. The article recommends zinc supplementation to correct the situation.
I agree with this, but there is more to the story. Omega-3 fats affect micronutrient absorption. In this paper, it is shown that there important interactions between omega-3 fats and zinc. This paper shows that omega-3 fats can affect zinc levels in the brain.
Therefore, while it may be good to supplement with zinc if you are deficient, it may be more important to get sufficient omega-3 fats in your diet first.
