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You are taking levothyroxine tablets -- Levoxyl®, Synthroid®, Unithroid®, or generic levothyroxine -- consistently and correctly, but your thyroid levels are not lowering, even with increasing doses.



You are probably not absorbing your levothyroxine tablets. You may be sensitive to a filler ingredient or dye. Or, you may have an undiagnosed digestive or gastrointestinal issue, or a malabsorption issue.

(Note: There are reports of patients who were taking levothyroxine tablets, but their thyroid tests showed no change, to the extent that doctors accuse them of secretly not taking their medication!)


One option is to try a different brand levothyroxine tablet. Due to the fillers and binders added to tablets, you may have better absorption with one brand versus another.

If you aren’t showing a response to levothyroxine tablets, experts recommend you switch to Tirosint® capsules or Tirosint®-SOL oral solution. These forms of levothyroxine were initially developed for people who can't effectively absorb tablets.


The Levothyroxine Deep Dive program is copyright © 2020, Mary Shomon. All rights reserved.

Levoxyl®, Synthroid®, Tirosint®, Tirosint-SOL®, and Unithroid® are registered trademarks. Product images and logos used with permission. 


Mary Shomon does not provide medical advice, diagnosis or treatment.


The contents of this video and material contained on the website ("content") are for informational purposes only. The content is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have learned from this video or site.

If you think you may have a medical emergency, call your doctor or 911 immediately. Mary Shomon does not recommend or endorse any specific tests, physicians, products, procedures, opinions, or other information that may be mentioned. Reliance on any information provided by Mary Shomon is solely at your own risk.

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