Does oatmeal have calcium
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Summary
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These studies suggest oatmeal contains calcium and its phytate content does not significantly interfere with calcium absorption in adult men.
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Calcium Content and Absorption in Oatmeal
Oatmeal Calcium Content
Oatmeal does contain calcium, but the amount is relatively low compared to other foods. The calcium present in oatmeal can be influenced by various factors, including the presence of other minerals and compounds within the oatmeal itself.
Phytic Acid and Calcium Absorption
Impact of Phytic Acid
One of the significant factors affecting calcium absorption from oatmeal is its high content of phytic acid. Phytic acid, or phytate, is known to bind minerals such as calcium, making them less available for absorption in the human digestive system. Studies have shown that the presence of phytate in oatmeal can interfere with the absorption of dietary calcium, leading to lower retention rates of calcium when compared to other grains like wheat .
Comparative Studies
Research comparing the absorption and retention of calcium from oatmeal and wheat diets found that calcium retention was better when wheat diets were consumed. This was attributed to the higher phytate content in oatmeal, which binds calcium and reduces its bioavailability. Additionally, it was observed that the calcium intake was not equalized in these studies, often being higher in wheat diets, which could also contribute to the differences in calcium retention.
Ionization and Precipitation of Calcium
Formation of Calcium Phytate
Further studies have indicated that when oatmeal is digested, a significant portion of its calcium content is precipitated as calcium phytate. This occurs when the solution containing oatmeal is brought to a neutral pH, leading to the formation of an insoluble magnesium-calcium phytate complex. This complex formation further reduces the amount of free calcium available for absorption.
Conclusion
In summary, while oatmeal does contain calcium, its high phytic acid content significantly hampers the absorption of this mineral. The formation of insoluble calcium phytate complexes further reduces the bioavailability of calcium from oatmeal. Therefore, although oatmeal can contribute to dietary calcium intake, its effectiveness is limited by these factors. For individuals looking to maximize their calcium intake, it may be beneficial to consider other dietary sources with higher bioavailability of calcium.
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