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I just finished your book - fantastic! I was diagnosed with deficient levels of Vitamin D & after 8 weeks of 50,000 D2 per week began D3 1000iu each evening. I also have idiopathic bile malabsorption & am taking cholestyramine (each morning).

Over the past 8 years, I've experienced severe ribcage pain which typically occurs in the evening (as painful as my 4 natural childbirth experiences) & is worse with cold, in the winter & with use of my upper extremities (like holding a baby or carrying a large pot of water). I can manage the symptoms with Flexeril 5mg qhs prn, but as this causes sedation, would prefer to handle this naturally. After reading your book, I realize that I am very overdue in rechecking my 25-OH D level (and I'll increase to 2000iu if my level isn't around 50). As an MD, I've tried to research a connection between ribcage muscle spasms & Vit. D deficiency, but haven't found anything. Have you heard of this in others who are D-deficient? Have you ever seen rickets of the ribcage? Also, in the book, response to D repletion seems to be fairly rapid. Realizing now that my lack of improvement may be due to inadequate repletion, I wonder if you've seen improvement take months/years. Here's another random question: Have you heard of any association between low Vit. D & bile malabsorption/intestinal problems other than IBD? Thank you for producing such a tremendous resource & for any guidance you can give! Have you considered producing a printable resource that MD's can give to their patients referencing your book & website?