Guest guest Posted March 17, 2005 Report Share Posted March 17, 2005 I'm pretty sure thyroid function has a rythem. But, it is tied in with adrenal function and hard to separate out from it completely. Thyroid output seems to be higher at night. Studies have found that the pituitary puts out as much as double the TSH at night in normal healthy people. It is thought that the body does repair and maintainance at night and so needs more energy. But, body temperature at night is lower than the day. When cortisol is higher, conversion of T4 to T3 increases and thyroid use increases. Cortisol is highest one hour after waking and stays fairly high till about noon, but body temperature, a measure of thyroid use in cells, is highest somewhere between 11:00 and 2:00. So, there seems to be a little delay between the daily cortisol high and the high in thyroid function inside cells. Probably thyroid output from the gland is highest at night and tapers down a bit toward morning and then is fairly stable through the first half of the day. Then, later in the day when it begins to decline into the evening. Thyroid use in cells is probably highest at night and midday coming in second. Body temperature, a measure of metabolic rate in cells, is usually highest at midday and drops through the rest of the day and early part of the night to the lowest at 12:00 to 3:00 in the morning. Cortisol is highest one hour after getting up and drops through the day to the lowest point at about 12:00 to 3:00 in the morning. Tish Quote Link to comment Share on other sites More sharing options...
Guest guest Posted March 17, 2005 Report Share Posted March 17, 2005 I'm pretty sure thyroid function has a rythem. But, it is tied in with adrenal function and hard to separate out from it completely. Thyroid output seems to be higher at night. Studies have found that the pituitary puts out as much as double the TSH at night in normal healthy people. It is thought that the body does repair and maintainance at night and so needs more energy. But, body temperature at night is lower than the day. When cortisol is higher, conversion of T4 to T3 increases and thyroid use increases. Cortisol is highest one hour after waking and stays fairly high till about noon, but body temperature, a measure of thyroid use in cells, is highest somewhere between 11:00 and 2:00. So, there seems to be a little delay between the daily cortisol high and the high in thyroid function inside cells. Probably thyroid output from the gland is highest at night and tapers down a bit toward morning and then is fairly stable through the first half of the day. Then, later in the day when it begins to decline into the evening. Thyroid use in cells is probably highest at night and midday coming in second. Body temperature, a measure of metabolic rate in cells, is usually highest at midday and drops through the rest of the day and early part of the night to the lowest at 12:00 to 3:00 in the morning. Cortisol is highest one hour after getting up and drops through the day to the lowest point at about 12:00 to 3:00 in the morning. Tish Quote Link to comment Share on other sites More sharing options...
Guest guest Posted March 17, 2005 Report Share Posted March 17, 2005 I'm pretty sure thyroid function has a rythem. But, it is tied in with adrenal function and hard to separate out from it completely. Thyroid output seems to be higher at night. Studies have found that the pituitary puts out as much as double the TSH at night in normal healthy people. It is thought that the body does repair and maintainance at night and so needs more energy. But, body temperature at night is lower than the day. When cortisol is higher, conversion of T4 to T3 increases and thyroid use increases. Cortisol is highest one hour after waking and stays fairly high till about noon, but body temperature, a measure of thyroid use in cells, is highest somewhere between 11:00 and 2:00. So, there seems to be a little delay between the daily cortisol high and the high in thyroid function inside cells. Probably thyroid output from the gland is highest at night and tapers down a bit toward morning and then is fairly stable through the first half of the day. Then, later in the day when it begins to decline into the evening. Thyroid use in cells is probably highest at night and midday coming in second. Body temperature, a measure of metabolic rate in cells, is usually highest at midday and drops through the rest of the day and early part of the night to the lowest at 12:00 to 3:00 in the morning. Cortisol is highest one hour after getting up and drops through the day to the lowest point at about 12:00 to 3:00 in the morning. Tish Quote Link to comment Share on other sites More sharing options...
Guest guest Posted March 17, 2005 Report Share Posted March 17, 2005 All hormones have a pettern of secretion, also have a chainraection type of effect. What you probably know is that TSH is what tell the thyroid to produce T4 and T3, but there is a hormone that tells the pituraitary to produce TSH also, it is called TRH. The one thing that affects their rythym the most is you sleep pattern. The hormones on the top tear of this chain reaction are usually secreted by the hypothalimus, these top tear hormones are usually only secreted at different stages of you sleep pattern. > > Does anyone know if the thyroid has a daily rhythm of when it > releases the most hormone? I know cortisol is released the most > about an hour after you get up, and then decreases as the day goes > on. Does thyroid have any similar pattern? I tried searching > google and got information on the pattern of release for seals and > ewes, but not us lowly humans. > > R. Quote Link to comment Share on other sites More sharing options...
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