If a research study looks at the effects of zinc on the immune system by dividing participants into 2 groups and giving one g

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If a research study looks at the effects of zinc on the immune system by dividing participants into 2 groups and giving one group a supplement of zinc and the other group a placebo every day for 3 months, what type of study is this? intervention study epidemiology study case study laboratory study QUESTION 28 fats and replace some of them with fats instead To reduce your risk of heart disease, you should limit O monounsaturated; trans O polyunsaturated; saturated saturated, trans saturated, unsaturated
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