In one study, magnesium ions were added to the diets of a group of men. The effect of this on the relative risk of CVD was recorded. The mean normal dietary intake of magnesium ions is 269 mg day-1. The results of the study are shown in the graph. 1.0 0.9 0.8 0.7 0.6 269 312 347 387 457 Mean magnesium ion intake / mg day-1 Relative risk of CVD (i) Which of the following statements can be made about the relationship between an increased magnesium ion intake and the risk of CVD in this study? (1) An increased magnesium ion intake

Source: 1(a)(i) · 1 · 2018