If Armour 1 grain equals 60 mcg, how does WP th... - Thyroid UK

Thyroid UK

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If Armour 1 grain equals 60 mcg, how does WP thyroid (newer version of Nature Throid) transfer to mcg's of Levothyroxine?


My child's naturopath said 1/2 grain of WPthyroid (nature throid) equals 50 mcg Levothyroxine. Is this wrong? I am worried because you said 1 grain of Armour equals 60 mcg of Levothyroxine. It doesn't make sense to me. Any help is appreciated before I need to call the endocrinologist who is very derisive of natural hormone and won't be amenable to my question as my child is no longer a patient of hers. Much appreciate any help. Thank you

4 Replies

I believe he is wrong. Link from RLC Labs who make it it. It is confusing when you've never had to deal with thyroid gland



cynthialj in reply to shaws

Thank you Shaws. I also checked this site, wpthyroid.com/pharmacy/conv... and it looks like it equates to 50 mcg Synthroid (levo)

shawsAdministrator in reply to cynthialj

Thanks for that info. I hope your daughter feels better soon.

helvellaAdministrator in reply to cynthialj

The conversion charts produced by /for those converting from levothyroxine to desiccated thyroid tend to be conservative. That is, they underestimate the amount of desiccated thyroid in order to play safe.

This is not a criticism, we wouldn't wish to be overdosed when converting, but it is as well to know. Therefore, if we are talking of going from 50mcg of levothyroxine to half a grain of desiccated thyroid, we would expect that to be safe though possibly a bit low. So, be aware, look out for possible under-dosing, and expect to have to increase the desiccated thyroid a bit - maybe to 3/4 grain. But it might not be necessary!!


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