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Hair loss is a well-known side effect of many chemotherapy drugs used to treat certain forms of cancer. Similar to other toxins that cause hair loss, hair loss from cancer medications usually isn ...
Low levels of thyroid hormones can lead to symptoms including fatigue, weight gain, cold intolerance, dry, flakey skin, loss of hair and inability to concentrate.
Hypothyroidism (an under-active thyroid) and the side effects of its related medications can cause hair loss, typically frontal, which is particularly associated with thinning of the outer third of the eyebrows (also seen with syphilis). Hyperthyroidism (an over-active thyroid) can also cause hair loss, which is parietal rather than frontal.
Certain other substances can cause adverse effects that may be severe. Combination of levothyroxine with ketamine may cause hypertension and tachycardia; [34] and tricyclic and tetracyclic antidepressants increase its toxicity. Soy, walnuts, fiber, calcium supplements, and iron supplements can also adversely affect absorption. [31]
Clinical depression can sometimes be caused by hypothyroidism. [77] Some research [78] has shown that T 3 is found in the junctions of synapses, and regulates the amounts and activity of serotonin, norepinephrine, and γ-aminobutyric acid (GABA) in the brain. Hair loss can sometimes be attributed to a malfunction of T 3 and T 4. Normal hair ...
The leading cause of hypothyroidism is Hashimoto’s disease (also known as Hashimoto’s thyroiditis, chronic autoimmune thyroiditis or lymphocytic thyroiditis), per Cleveland Clinic.
Certain medications can have the unintended side effect of affecting thyroid function. While some medications can lead to significant hypothyroidism or hyperthyroidism and those at risk will need to be carefully monitored, some medications may affect thyroid hormone lab tests without causing any symptoms or clinical changes, and may not require treatment.
One important note: Excess biotin can also "cause incorrect results in certain laboratory tests that look at thyroid levels and blood markers that can help diagnose heart attacks," says Dr. Castillo.