Which one among the following is not a good source of nutritional calcium?

Polished white rice is a very poor source of dietary calcium compared with the other options: studies and food analyses show polished white rice preparations contain only about 1–10 mg Ca/100 g, i.e. negligible amounts for meeting calcium needs [2]. In contrast, finger millet (ragi) is a well-recognized calcium-rich cereal (reported values ~364 mg/100 g for some varieties) and millets are promoted for their high mineral content [2]. Milk and low-fat/skimmed milk are established dietary sources of calcium and are recommended as calcium-rich foods in dietary guidance [3]. Eggs contain some calcium but not nearly as little as polished white rice; therefore rice is not a good source of nutritional calcium.

Sources

1. [2] https://www.frontiersin.org/journals/sustainable-food-systems/articles/10.3389/fsufs.2024.1331260/full
2. [1] Science-Class VII . NCERT(Revised ed 2025) > Chapter 6: Adolescence: A Stage of Growth and Change > 6.4.1 Meeting nutritional needs > p. 79
3. [3] https://pmc.ncbi.nlm.nih.gov/articles/PMC9008112/