Final answer:
The test that does not reflect selenium status is Methionine.
Step-by-step explanation:
The test that does not reflect selenium status is Methionine.
Plasma selenium level, erythrocyte concentration, and plasma glutathione peroxidase are all tests that can be used to assess selenium status.
Methionine, on the other hand, is an amino acid that contains sulfur and is not directly related to selenium levels.