The Receipts
Where the numbers that dismiss you actually came from: who set each threshold, in what year, from which population — and what the research says now. One column, with its documents on the table.
Evidence-based answers for women whose labs came back "normal"
Cited research on ferritin, thyroid, perimenopause and the hormone symptoms that routine reference ranges miss. Every claim links to the study behind it.
By topic
Iron and ferritin
Ferritin, transferrin saturation, iron deficiency without anaemia, supplements, infusions, and the gap between a normal result and enough iron.
Thyroid and Hashimoto's
TSH, free T3 and T4, antibodies, subclinical hypothyroidism, and why a result inside the range can still come with symptoms.
Latest guides
Hashimoto's With a Normal TSH: Can It Still Cause Symptoms?
Possibly, yes. In 108 euthyroid Hashimoto's patients, symptoms were more common than in 57 healthy controls and tracked antibody levels, not thyroid hormones . That is correlation. No r
Where Your Lab's Ferritin Floor Actually Came From
The lower limit printed beside your ferritin result is a statistical interval, not a threshold for having enough iron. In a survey of 23 North American laboratories, 18 reported female
Iron Deficiency Without Anaemia: Why Tired Is Not In Your Head
Yes, low iron can flatten you while your blood count stays normal. Anaemia is the last stage of iron deficiency, not the first. In a double-blind trial of 164 women aged 18 to 45 whose