鉄分

1. Origins, structure, and basic meaning

• Structure: 鉄分 (てつぶん) is a noun for iron as a dietary nutrient or constituent of the body.
• Basic usage: 鉄分の量 specifies the amount shown on a food label, while 鉄分の役割 specifies the function of iron in the body.

2. Common pitfalls and similar expressions

• Quantity and physiological role
  • 鉄分の量 and 鉄分の役割 view the same nutrient through quantity and function. 鉄分 here is not an iron object or a piece of metal.