Doctor insights on:
What Is A Low Thyroid Level
Thyroid: Could mean several things, but i guess you are probably asking about tsh. A pregnant woman's TSH is normally suppressed (lowered) during the first trimester of pregnancy, which gives the false impression of an over-active thyroid. Ob doctors should all be aware of this. If this is not what you were asking, feel free to clarify. ...Read more
Lab dependent: Each lab has slightly different reference ranges for each test. If you are asking about the TSH test, usually range is 0.4-4.0. Borderline high (for me) is 4.0-8.0, and above 8.0, i usually will treat or adjust the patients thyroid replacement. ...Read more
Above 4.5: In most labs, a value above 4.5 is high. However, symptoms related to low thyroid correlate much better with free T4 levels, rather than tsh. There are many people with elevated tsh, normal free t4, who feel perfectly normal (subclinical hypothyroidism). Persistently high TSH levels is indicative of a failing thyroid. ...Read more
Hypothyroidism: The actual thyroid hormone is T4 and t3 (liothyronine). When they are low, TSH elevates, but how high is somewhat variable, and "high tsh" per se is not dangerous. A low t4/t3 (liothyronine) can be dangerous; TSH is a good marker of thyroid function, but often it is necessary to measure ft4 or t3 (liothyronine). A mild elevation of TSH (eg. 4-10) is often without any symptoms and a normal ft4. ...Read more
What is consider too low of thyroid antibodies and thyroid peroxidase? What is a good reference range?
Levels not important: To see if your thyroid is healthy the only tests needed are a total or free T4 and a TSH. If they are fine there is no need to measure thyroid antibodies. If the TSH is high, elevation of one or both thyroid antibodies suggests you may have autoimmune thyroiditis which sometimes causes an underactive thyroid. Very high levels may indicate a higher risk but low levels are of no concern ...Read moreSee 2 more doctor answers
Iron Levels: A healthy person should have a normal iron serum level in the range of 60 to 170 micrograms per deciliter of blood. Iron is an essential mineral, as well as a component of the proteins are used for oxygen transportation and metabolism. Iron helps to synthesize dopamine, Epinephrine and serotonin. Iron is stored in the body for use when dietary iron intake is low. ...Read more
Hashimotos: The most common cause is hashimotos thyroiditis, which is an autoimmune slow destruction of the thyroid. It tends to run in families, but not perfectly. It is easy to fix with thyroid replacement. ...Read more
It depends/can vary.: The standard reference ranges for serum creatinine are 0.5 to 1.0 mg/dl (about 45-90 ?mol/l) for women and 0.7 to 1.2 mg/dl (60-110 ?mol/l) for men. These can vary. For example, a bodybuilder can have a creatinine level of 2.0 and be healthy, while an elderly female can have a value of 1.2 and have severe renal disease. ...Read more
Need to look at T3 (liothyronine): And free t4. Low tsh, depending on the sensitivity of the assay, indicates thyroid hyper-function. However, the suspected hyperthyroidism needs to be confirmed with high levels of T3 (liothyronine) and free t4. All lab tests need to be evaluated in the clinical context and it would be prudent to take up the issue with your doctor. ...Read more
TSH: Tsh- thyroid stimulating hormone is released by the pituitary in response to low thyroid (t4) hormone levels. Tsh then causes more T4 to be released from the thyroid. High levels of T4 turn off the release of TSH in what is called a negative feedback loop. This process keeps thyroid levels relatively constant. ...Read moreSee 1 more doctor answer
It's controversial: There is broad consensus that a TSH between 0.3-2.5 is normal (assuming no pituitary problem exists), and broad consensus that TSH levels above 10 are abnormal and should be treated. A middle-of-the-road approach might be to say that levels between 5-10 are abnormal, and treatment is likely to be beneficial, and that values between 2.5-5 may be abnormal, and that treatment may be beneficial. ...Read moreSee 1 more doctor answer
Less than 30 ng/ml: The normal vitamin d level ranges from 30-80ng/ml (may vary somewhat in different lab). Thus, level less than 30 is considered deficient. I have tested many patients and have never seen anyone having above 65ng/ml--i gues because we generally don't get get enough sun exposure and/or not getting adequate intake from diet. Consult doc. Good luck... Ng/ml=nanogram/milliliter. ...Read more
Hypothyroidism: Different doctors will initiate therapy at different levels of thyroid underactivity. Most endocrinologists treat earlier rather than later. See an endocrinologist is you are not satisfied with your pcp's opinion. ...Read more
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