Guest guest Posted July 12, 2010 Report Share Posted July 12, 2010 I, personally don't believe this. The reason TSH and T4 can go down with no problem is because the body is getting the T3 it actually uses and doesn't have to call for more. Whether the body has sufficient T3 from converting from T4 or getting it from Cytomel, the point is it has it, and once it's in the cells it's all over the body including the brain, or else we'd all be getting dimwitted the longer we took the cytomel only. <>Roni Immortality exists! It's called knowledge! Just because something isn't seen doesn't mean it's not there<> Subject: Brain Barrier?To: RT3_T3 Date: Monday, July 12, 2010, 4:40 PM Has anyone read this article? Has anyone else heard that T3 cannot cross the barrier into the brain and that the brain converts its own T4 and that's the only way it can get T3???http://www.thyroid-info.com/articles/dommisse.htm"Secondly, treating with T3-only is almost as bad as treating with T4-only in most cases and worse than T4-only in some cases. I say 'almost as bad' because, since 90% of thyroid function is carried out by T3, correcting the T3 level is a good thing. However, the brain needs T4 to be present in the blood in a good amount because T3 doesn't cross the 'blood-brain barrier' and get into the brain directly. T4 has to get into the brain first and then convert to T3 in the brain tissues. So the cognitive effects of a low T4 level would continue because T3-only treatment raises the T3 level a lot, often way above normal (with all the dangers inherent in that situation), and, by lowering the TSH level, this also lowers the T4 level to way-below normal. I cannot understand why anyone would want to treat with T3-only and not use both thyroid hormones, as needed to optimize BOTH free-levels. This is not to deny that many people treated with T3-only will improve in many ways; after all, T3 is a very important hormone; but they would improve much better and with less ill-effects if both their FT4 and FT3 levels are optimized and neither one is overtreated or undertreated." Quote Link to comment Share on other sites More sharing options...
Guest guest Posted July 12, 2010 Report Share Posted July 12, 2010 This actually comes up here at least once every 6 monhts or so. Thsi si OLD informaiton which has lONG ago been proven wrong. They have found that T3 DOES cross not only the blood brain barrier but the placental barrier as well onit;s own t5ransporter. Becuse it did nto cross wiht T34 on iT's transporter they thoght it did nto cross at all years ago, but this was disproven over 20 years ago. http://health.groups.yahoo.com/group/NaturalThyroidHormonesADRENALS/ http://faqhelp.webs.com/ http://health.groups.yahoo.com/group/RT3_T3/ http://www.thyroid-rt3.com/ http://groups.yahoo.com/group/HypoPets/ http://artisticgrooming.net/ Has anyone read this article? Has anyone else heard that T3 cannot cross the barrier into the brain and that the brain converts its own T4 and that's the only way it can get T3??? http://www.thyroid-info.com/articles/dommisse.htm "Secondly, treating with T3-only is almost as bad as treating with T4-only in most cases and worse than T4-only in some cases. I say 'almost as bad' because, since 90% of thyroid function is carried out by T3, correcting the T3 level is a good thing. However, the brain needs T4 to be present in the blood in a good amount because T3 doesn't cross the 'blood-brain barrier' and get into the brain directly. T4 has to get into the brain first and then convert to T3 in the brain tissues. So the cognitive effects of a low T4 level would continue because T3-only treatment raises the T3 level a lot, often way above normal (with all the dangers inherent in that situation), and, by lowering the TSH level, this also lowers the T4 level to way-below normal. I cannot understand why anyone would want to treat with T3-only and not use both thyroid hormones, as needed to optimize BOTH free-levels. This is not to deny that many people treated with T3-only will improve in many ways; after all, T3 is a very important hormone; but they would improve much better and with less ill-effects if both their FT4 and FT3 levels are optimized and neither one is overtreated or undertreated." Quote Link to comment Share on other sites More sharing options...
Guest guest Posted July 12, 2010 Report Share Posted July 12, 2010 I'm not sure it has to do with dimwittedness... But perhaps headaches? Dizziness?Has anyone been on the T3 only for over a year? 5 years? 10 years?Here's a guy who refutes the claim that T3 can't travel to the brain:http://www.thyroid-info.com/articles/dommisse.htmFrom: Roni Molin To: RT3_T3 Sent: Mon, July 12, 2010 6:56:07 PMSubject: Re: Brain Barrier? I, personally don't believe this. The reason TSH and T4 can go down with no problem is because the body is getting the T3 it actually uses and doesn't have to call for more. Whether the body has sufficient T3 from converting from T4 or getting it from Cytomel, the point is it has it, and once it's in the cells it's all over the body including the brain, or else we'd all be getting dimwitted the longer we took the cytomel only. <>Roni Immortality exists! It's called knowledge! Just because something isn't seen doesn't mean it's not there<> From: <christ3only@ yahoo.com>Subject: Brain Barrier?To: RT3_T3 (AT) yahoogroups (DOT) comDate: Monday, July 12, 2010, 4:40 PM Has anyone read this article? Has anyone else heard that T3 cannot cross the barrier into the brain and that the brain converts its own T4 and that's the only way it can get T3???http://www.thyroid- info.com/ articles/ dommisse. htm"Secondly, treating with T3-only is almost as bad as treating with T4-only in most cases and worse than T4-only in some cases. I say 'almost as bad' because, since 90% of thyroid function is carried out by T3, correcting the T3 level is a good thing. However, the brain needs T4 to be present in the blood in a good amount because T3 doesn't cross the 'blood-brain barrier' and get into the brain directly. T4 has to get into the brain first and then convert to T3 in the brain tissues. So the cognitive effects of a low T4 level would continue because T3-only treatment raises the T3 level a lot, often way above normal (with all the dangers inherent in that situation), and, by lowering the TSH level, this also lowers the T4 level to way-below normal. I cannot understand why anyone would want to treat with T3-only and not use both thyroid hormones, as needed to optimize BOTH free-levels. This is not to deny that many people treated with T3-only will improve in many ways; after all, T3 is a very important hormone; but they would improve much better and with less ill-effects if both their FT4 and FT3 levels are optimized and neither one is overtreated or undertreated. " Quote Link to comment Share on other sites More sharing options...
Guest guest Posted July 12, 2010 Report Share Posted July 12, 2010 This is an interesting article. I'm curious to see Val's response. Kerry > > > >From: > >Subject: Brain Barrier? > >To: RT3_T3 (AT) yahoogroups (DOT) com > >Date: Monday, July 12, 2010, 4:40 PM > > > > > > > > > > > >Has anyone read this article? Has anyone else heard that T3 cannot cross the > >barrier into the brain and that the brain converts its own T4 and that's the > >only way it can get T3??? > > > >http://www.thyroid- info.com/ articles/ dommisse. htm > > > > " Secondly, treating with T3-only is almost as bad as treating with T4-only in > >most cases and worse than T4-only in some cases. I say 'almost as bad' because, > >since 90% of thyroid function is carried out by T3, correcting the T3 level is a > >good thing. However, the brain needs T4 to be present in the blood in a good > >amount because T3 doesn't cross the 'blood-brain barrier' and get into the brain > >directly. T4 has to get into the brain first and then convert to T3 in the brain > >tissues. So the cognitive effects of a low T4 level would continue because > >T3-only treatment raises the T3 level a lot, often way above normal (with all > >the dangers inherent in that situation), and, by lowering the TSH level, this > >also lowers the T4 level to way-below normal. I cannot understand why anyone > >would want to treat with T3-only and not use both thyroid hormones, as needed to > >optimize BOTH free-levels. This is not to deny that many people treated with > >T3-only will improve in many ways; after all, T3 is a very important hormone; > >but they would improve much better and with less ill-effects if both their FT4 > >and FT3 levels are optimized and neither one is overtreated or undertreated. " > > > > > > > > > > > Quote Link to comment Share on other sites More sharing options...
Guest guest Posted July 12, 2010 Report Share Posted July 12, 2010 This is an interesting article. I'm curious to see Val's response. Kerry > > > >From: > >Subject: Brain Barrier? > >To: RT3_T3 (AT) yahoogroups (DOT) com > >Date: Monday, July 12, 2010, 4:40 PM > > > > > > > > > > > >Has anyone read this article? Has anyone else heard that T3 cannot cross the > >barrier into the brain and that the brain converts its own T4 and that's the > >only way it can get T3??? > > > >http://www.thyroid- info.com/ articles/ dommisse. htm > > > > " Secondly, treating with T3-only is almost as bad as treating with T4-only in > >most cases and worse than T4-only in some cases. I say 'almost as bad' because, > >since 90% of thyroid function is carried out by T3, correcting the T3 level is a > >good thing. However, the brain needs T4 to be present in the blood in a good > >amount because T3 doesn't cross the 'blood-brain barrier' and get into the brain > >directly. T4 has to get into the brain first and then convert to T3 in the brain > >tissues. So the cognitive effects of a low T4 level would continue because > >T3-only treatment raises the T3 level a lot, often way above normal (with all > >the dangers inherent in that situation), and, by lowering the TSH level, this > >also lowers the T4 level to way-below normal. I cannot understand why anyone > >would want to treat with T3-only and not use both thyroid hormones, as needed to > >optimize BOTH free-levels. This is not to deny that many people treated with > >T3-only will improve in many ways; after all, T3 is a very important hormone; > >but they would improve much better and with less ill-effects if both their FT4 > >and FT3 levels are optimized and neither one is overtreated or undertreated. " > > > > > > > > > > > Quote Link to comment Share on other sites More sharing options...
Guest guest Posted July 12, 2010 Report Share Posted July 12, 2010 This is an interesting article. I'm curious to see Val's response. Kerry > > > >From: > >Subject: Brain Barrier? > >To: RT3_T3 (AT) yahoogroups (DOT) com > >Date: Monday, July 12, 2010, 4:40 PM > > > > > > > > > > > >Has anyone read this article? Has anyone else heard that T3 cannot cross the > >barrier into the brain and that the brain converts its own T4 and that's the > >only way it can get T3??? > > > >http://www.thyroid- info.com/ articles/ dommisse. htm > > > > " Secondly, treating with T3-only is almost as bad as treating with T4-only in > >most cases and worse than T4-only in some cases. I say 'almost as bad' because, > >since 90% of thyroid function is carried out by T3, correcting the T3 level is a > >good thing. However, the brain needs T4 to be present in the blood in a good > >amount because T3 doesn't cross the 'blood-brain barrier' and get into the brain > >directly. T4 has to get into the brain first and then convert to T3 in the brain > >tissues. So the cognitive effects of a low T4 level would continue because > >T3-only treatment raises the T3 level a lot, often way above normal (with all > >the dangers inherent in that situation), and, by lowering the TSH level, this > >also lowers the T4 level to way-below normal. I cannot understand why anyone > >would want to treat with T3-only and not use both thyroid hormones, as needed to > >optimize BOTH free-levels. This is not to deny that many people treated with > >T3-only will improve in many ways; after all, T3 is a very important hormone; > >but they would improve much better and with less ill-effects if both their FT4 > >and FT3 levels are optimized and neither one is overtreated or undertreated. " > > > > > > > > > > > Quote Link to comment Share on other sites More sharing options...
Guest guest Posted July 13, 2010 Report Share Posted July 13, 2010 > >This is an interesting article. I'm curious to see Val's response. My personal experience says it's wrong, I am doing very nicely on T3 only thanks Nick -- for more information on RT3 and Thyroid Resistance go to www.thyroid-rt3.com Quote Link to comment Share on other sites More sharing options...
Guest guest Posted July 13, 2010 Report Share Posted July 13, 2010 > >This is an interesting article. I'm curious to see Val's response. My personal experience says it's wrong, I am doing very nicely on T3 only thanks Nick -- for more information on RT3 and Thyroid Resistance go to www.thyroid-rt3.com Quote Link to comment Share on other sites More sharing options...
Guest guest Posted July 13, 2010 Report Share Posted July 13, 2010 " False Beliefs about T3 (by Dr Lowe) http://www.thyroidscience.com/Criticism/lowe.2008/blanchard.false.beliefs.t3.htm " Only T4 is Transported into the Brain " :A Widespread False Belief Dr. C. Lowe http://www.drlowe.com/jcl/comentry/t3entersbrain.htm New Studies Refute an Old Objection to T3 Therapy http://www.drlowe.com/jcl/comentry/notransthyretin.htm " > > Has anyone read this article? Has anyone else heard that T3 cannot cross the barrier into the brain and that the brain converts its own T4 and that's the only way it can get T3??? > > > > http://www.thyroid-info.com/articles/dommisse.htm > > > > " Secondly, treating with T3-only is almost as bad as treating with > > T4-only in most cases and worse than T4-only in some cases. I say > > 'almost as bad' because, since 90% of thyroid function is carried out > > by T3, correcting the T3 level is a good thing. However, the brain > > needs T4 to be present in the blood in a good amount because T3 > > doesn't cross the 'blood-brain barrier' and get into the brain > > directly. T4 has to get into the brain first and then convert to T3 in > > the brain tissues. So the cognitive effects of a low T4 level would > > continue because T3-only treatment raises the T3 level a lot, often > > way above normal (with all the dangers inherent in that situation), > > and, by lowering the TSH level, this also lowers the T4 level to > > way-below normal. I cannot understand why anyone would want to treat > > with T3-only and not use both thyroid hormones, as needed to optimize > > BOTH free-levels. This is not to deny that many people treated with > > T3-only will improve in many ways; after all, T3 is a very important > > hormone; but they would improve much better and with less ill-effects > > if both their FT4 and FT3 levels are optimized and neither one is > > overtreated or undertreated. " Quote Link to comment Share on other sites More sharing options...
Guest guest Posted July 13, 2010 Report Share Posted July 13, 2010 " False Beliefs about T3 (by Dr Lowe) http://www.thyroidscience.com/Criticism/lowe.2008/blanchard.false.beliefs.t3.htm " Only T4 is Transported into the Brain " :A Widespread False Belief Dr. C. Lowe http://www.drlowe.com/jcl/comentry/t3entersbrain.htm New Studies Refute an Old Objection to T3 Therapy http://www.drlowe.com/jcl/comentry/notransthyretin.htm " > > Has anyone read this article? Has anyone else heard that T3 cannot cross the barrier into the brain and that the brain converts its own T4 and that's the only way it can get T3??? > > > > http://www.thyroid-info.com/articles/dommisse.htm > > > > " Secondly, treating with T3-only is almost as bad as treating with > > T4-only in most cases and worse than T4-only in some cases. I say > > 'almost as bad' because, since 90% of thyroid function is carried out > > by T3, correcting the T3 level is a good thing. However, the brain > > needs T4 to be present in the blood in a good amount because T3 > > doesn't cross the 'blood-brain barrier' and get into the brain > > directly. T4 has to get into the brain first and then convert to T3 in > > the brain tissues. So the cognitive effects of a low T4 level would > > continue because T3-only treatment raises the T3 level a lot, often > > way above normal (with all the dangers inherent in that situation), > > and, by lowering the TSH level, this also lowers the T4 level to > > way-below normal. I cannot understand why anyone would want to treat > > with T3-only and not use both thyroid hormones, as needed to optimize > > BOTH free-levels. This is not to deny that many people treated with > > T3-only will improve in many ways; after all, T3 is a very important > > hormone; but they would improve much better and with less ill-effects > > if both their FT4 and FT3 levels are optimized and neither one is > > overtreated or undertreated. " Quote Link to comment Share on other sites More sharing options...
Guest guest Posted July 13, 2010 Report Share Posted July 13, 2010 " False Beliefs about T3 (by Dr Lowe) http://www.thyroidscience.com/Criticism/lowe.2008/blanchard.false.beliefs.t3.htm " Only T4 is Transported into the Brain " :A Widespread False Belief Dr. C. Lowe http://www.drlowe.com/jcl/comentry/t3entersbrain.htm New Studies Refute an Old Objection to T3 Therapy http://www.drlowe.com/jcl/comentry/notransthyretin.htm " > > Has anyone read this article? Has anyone else heard that T3 cannot cross the barrier into the brain and that the brain converts its own T4 and that's the only way it can get T3??? > > > > http://www.thyroid-info.com/articles/dommisse.htm > > > > " Secondly, treating with T3-only is almost as bad as treating with > > T4-only in most cases and worse than T4-only in some cases. I say > > 'almost as bad' because, since 90% of thyroid function is carried out > > by T3, correcting the T3 level is a good thing. However, the brain > > needs T4 to be present in the blood in a good amount because T3 > > doesn't cross the 'blood-brain barrier' and get into the brain > > directly. T4 has to get into the brain first and then convert to T3 in > > the brain tissues. So the cognitive effects of a low T4 level would > > continue because T3-only treatment raises the T3 level a lot, often > > way above normal (with all the dangers inherent in that situation), > > and, by lowering the TSH level, this also lowers the T4 level to > > way-below normal. I cannot understand why anyone would want to treat > > with T3-only and not use both thyroid hormones, as needed to optimize > > BOTH free-levels. This is not to deny that many people treated with > > T3-only will improve in many ways; after all, T3 is a very important > > hormone; but they would improve much better and with less ill-effects > > if both their FT4 and FT3 levels are optimized and neither one is > > overtreated or undertreated. " Quote Link to comment Share on other sites More sharing options...
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