Is kale the lowest bioavailability of calcium?

Kale is often considered to have lower bioavailability of calcium compared to some other leafy greens, like collard greens or bok choy, due to the presence of oxalates, which can inhibit calcium absorption. However, it still provides a good source of calcium and other nutrients. The overall impact on calcium intake can vary based on an individual's diet and calcium sources. Therefore, while kale may not be the most efficient source of calcium, it remains a valuable addition to a balanced diet.