You are developing a brief educational handout encouraging magnesium adequacy in a university population. Combine evidence-based recommendations about food sources and supplement safety into a concise message that discourages over-supplementation but encourages dietary strategies.

• A. Encourage elimination of all salt from the diet and replacement with magnesium supplements at 1000 mg/day to maximize benefits for cognitive performance.
• B. Suggest that students disregard dietary sources and only rely on energy drinks fortified with magnesium since those provide the most bioavailable forms and are therefore superior to whole foods.
• C. Advise students to take at least 500 mg of supplemental magnesium daily and avoid magnesium-rich foods because food magnesium interferes with supplement absorption; no clinical monitoring is required for healthy young adults.
• D. Recommend eating magnesium-rich foods like almonds, spinach, whole grains, legumes and avocados as the first-line strategy because food sources are safe and absorbable; advise that supplements can help selected individuals but caution not to exceed 350 mg/day from supplements (monitor renal function), and encourage consulting health services before starting high-dose supplements.

Answer: (D)