levothyroxine/high fiber diet

[jonhcena]

good evening,

i would like to be clarified if it is possible, whats the magnitude of a high fiber diet and levothyroxine absorption. i can talk about my personal case im a newbie vegetarian, and everybody knows that this diet include a lot of fiber in its menu,

my question is ofc related to this situation, i had made a lot of research concerning the impact of high fiber diet can have here, but i couldnt find in terms of percentage , what could be worst case scenario in terms of levo absorption?20%,? 30%?.......whats the real deal here

[gimel]

Apparently the interaction is that the higher fiber just interferes with absorption and thus reduces T4 level and that causes an increase in TSH.   So I would not be concerned.  Just maintain a consistent approach to fiber amount and timing for medication and if the resultant Free T4 is inadequate, then you should request an increase in dosage.  

[jonhcena]

tx for your reply, i know prob i shouldnt be that worried about this topic, but the information on the internet its so contracdictory that its impossible not be concerned with this.

i want you guys to check this study where they talk about the possible interaction between high fiber diet and levo, i want to hear from u guys,

tx in advance for the interest


the link:http://www.jwatch.org/jw199603190000007/1996/03/19/fiber-may-reduce-action-levothyroxine

[gimel]

I don't know that there is a definitive answer to that question.  Instead, I would like to pose a different question for you to consider.  Why is it worth worrying about trying to determine a good level and maintaining  that amount of fiber on a consistent basis?  Combined with your med and dosage, whatever absorption level you have will result in some levels of Free T4 and Free T3.  If those levels are too low, then the most effective approach, in my opinion, is to just increase the dose as needed to relieve symptoms (which is the objective), rather than trying to adjust the amount of fiber and absorption.  The most important consideration to me is to just be consistent in your approach to your diet and medication dosage.