Spinach

4 familiar leaves contain lots of calcium which is good for health

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Moringa leaves, perilla, amaranth, pennywort - 4 types of leaves containing a lot of calcium are good for health, easy to find and use daily.

Familiar vegetables rich in calcium are good for the bones of the elderly

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Amaranth is a familiar vegetable rich in calcium and other nutrients, very good for bones and joints, and the health of the elderly.