Tag: Does fiber block calcium absorption

While dietary fiber is widely praised for its health benefits, there has been some concern that a high intake may impair mineral absorption, specifically calcium. A high-fiber diet, particularly one rich in whole grains and legumes, contains compounds like phytates and oxalates that can indeed bind to calcium in the gut, reducing its bioavailability. However, the impact is more nuanced than a simple 'yes' or 'no', with the type of fiber, preparation methods, and overall dietary balance all playing a significant role.