Here is a post I made recently with links about high phosphorus (in response to a question about high phosphorus coming from vitamins):
http://neurotalk.psychcentral.com/post1133636-128.html
Low T3 means you are either not making some from the thyroid, or not converting T4 properly. It needs an endocrinologist to evaluate.
The thyroid makes both some T3 and mostly T4. Under stress T3 should increase, but sometimes it does not.
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All truths are easy to understand once they are discovered; the point is to discover them.-- Galileo Galilei
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Weezie looking at petunias 8.25.2017
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