Which nutrient is considered NOT to be a primary source from beef?

Calcium is considered not to be a primary nutrient source from beef. While beef is an excellent source of several key nutrients, including protein, iron, and B vitamins, it does not contain a significant amount of calcium. Calcium is predominantly found in dairy products, leafy greens, and certain fish, making these foods the primary contributors to a person's calcium intake.

In contrast, beef is rich in protein, which is vital for muscle growth and repair, iron, which is crucial for oxygen transport in the blood, and B vitamins, which are important for energy metabolism and overall health. Each of these nutrients is abundantly supplied by beef, reinforcing its status as a nutrient-dense food. Therefore, when considering the nutrient profile of beef, calcium stands out as the nutrient not primarily sourced from this meat.