04/03/2026
You've been wondering about your thyroid health but all you have is a lousy TSH and some routine bloodwork. Good news β those routine markers might be telling you more than you think. Here's what to look for π
Ferritin β thyroid hormones are required for iron absorption. Low ferritin in a thyroid patient isn't a coincidence, it's a direct consequence. And low ferritin blocks T4 to T3 conversion, meaning more symptoms even when TSH looks fine.
Cholesterol β thyroid hormones control how your liver clears cholesterol. When thyroid function slows, cholesterol builds. Up to 90% of hypothyroid patients have abnormal lipid levels β many get a statin before anyone checks the thyroid.
Vitamin D β 70% of Hashimoto's patients are deficient vs. 18% of healthy controls. The autoimmune inflammation burns through D faster and makes it harder to use. It's not the same as regular low D.
Fasting glucose β thyroid dysfunction affects how your cells use glucose. Rising blood sugar in someone eating well can be a thyroid problem, not a diet problem.
Liver enzymes β the liver depends on thyroid hormone to process fat. Mild unexplained elevations alongside rising cholesterol is a thyroid red flag that almost always gets missed.
Normal isn't the same as optimal.
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