Answer :
Final answer:
Magnesium toxicity can occur when daily intake exceeds 2.55 mmol/day or when the magnesium ion concentration exceeds 0.0244 M, leading to potential health issues.
Explanation:
In regard to magnesium toxicity, the levels of concentration that may indicate a risk are beyond the normal values. The average daily intake of magnesium should usually fall between 2.15-2.55 mmol/day. When [Mg2+], the magnesium ion concentration, exceeds 0.0244 M, it may indicate toxicity. It's vital to monitor these levels as excessive magnesium can lead to health issues including lethargy, muscle weakness, and even heart issues.
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