Compare daily intakes: a person consumes 1,200 mg calcium and 45 µg molybdenum. Convert molybdenum to mg and determine which is a major mineral intake and which is trace.

Molybdenum cannot be converted to mg for dietary interpretation because all trace minerals are reported only in µg and major minerals only in mg; therefore classification is not possible without re-measuring intakes in standardized units.

Molybdenum = 0.045 mg; calcium (1,200 mg) is major, molybdenum (0.045 mg) is trace.

Molybdenum = 45 mg; both calcium and molybdenum would be major minerals because both are above 100 mg/day after conversion.

Molybdenum = 0.00045 mg; calcium would be trace and molybdenum ultratrace because modern analytical chemistry suggests different cutoffs than dietary guidance.