Which of the following is a food source of the mineral calcium?

Dairy is widely recognized as one of the richest food sources of calcium, making it essential for building and maintaining strong bones and teeth. Dairy products, such as milk, cheese, and yogurt, contain high levels of bioavailable calcium, meaning the body can easily absorb and use this mineral. The presence of lactose in dairy products also aids in calcium absorption.

While spinach and other plant foods like almonds and certain types of fish do contain calcium, the bioavailability of calcium from these sources can be lower. For example, spinach contains oxalates that can inhibit calcium absorption, and while almonds do provide some calcium, they do not offer as much as dairy. Some fish do contain calcium, particularly those that are consumed with their bones, like sardines; however, the overall contribution to dietary calcium intake compared to dairy is generally less significant. Thus, dairy stands out as the most reliable and concentrated source of calcium.