What effect does high phosphorus intake have on calcium absorption?

High phosphorus intake has a detrimental effect on calcium absorption by decreasing it. The relationship between phosphorus and calcium is complex and closely tied to our body's mineral balancing system. When there is excessive phosphorus in the diet, it can lead to an imbalance that stimulates the release of parathyroid hormone (PTH). PTH can influence the levels of calcium in the bloodstream and often causes the body to take calcium from bones, which is detrimental to bone health.

Additionally, an overload of phosphorus can interfere with the conversion of vitamin D to its active form. Vitamin D plays a crucial role in facilitating calcium absorption in the intestines. Thus, when phosphorus levels are too high, this process is inhibited, making it harder for the body to absorb calcium effectively. As a result, a high intake of phosphorus can lead to decreased calcium absorption and potentially contribute to weakened bones over time.