Higher potassium and higher copper levels synergistically support an increase in intracellular calcium, with Vitamin D affecting mostly serum calcium levels through hormonal action and increased intestinal absorption. Boron affects calcium and magnesium uptake as well, however it generally doesn't come into play with the average individual unless supplemented. Low levels of manganese, phosphorus, zinc, nickel and Vitamin C encourage an increase in intracellular calcium ratio-wise, and will eventually create a risk for calcification. However, it is not unusual to actually experience symptoms of calcium deficiency in some cases, because of calcium becoming bio-unavailable at higher levels, resulting in calcium loss from bone... Full Text