Vitamin D Deficiency Test
Hypothyroidism can be linked with low vitamin D levels, affecting bone health and immune function. Test serum 25-hydroxyvitamin D.

Vitamin B12 Level Test
Check vitamin B12 levels to prevent neurological symptoms, as hypothyroidism may cause or be linked with pernicious anemia.

Folate (Vitamin B9) Test
Evaluate folate levels, especially if experiencing fatigue, as deficiency can contribute to anemia.

Iron Studies (Including Ferritin)
Test ferritin and iron levels, as iron deficiency can mimic or worsen hypothyroid symptoms.

Consultation with a Physician
An endocrinologist or primary care physician can recommend appropriate tests based on symptoms and thyroid management.