This book was disappointing.

I was really hoping that it would be ALL about vitamin D, but, like many health books, it is frustratingly filled out with recipes, exercises, and other extraneous information.

The beginning and end did go into some satisfying detail, but that was less than half of the book. I was also annoyed that the actual studies and data were not referenced in the text - am I supposed to check every single reference in the back for the points talked about in the main text?

Vitamin D is extremely important. There is so much to say about it, and this book could have said more. I have strong disagreements with practically every other piece of advice in this book. I don’t expect any book to completely agree with my camp, but the disagreements were just too large and numerous to recommend this book.

Getting a blood test for vitamin D levels is worth it. Levels should be between 50-70ng/ml. Most modern people will be deficient. Especially dark skinned people and anyone in northern latitudes. UVB must be 3+ for you to make D in your body, and the darker your skin is the more exposure you need. That’s everything you need to know about this book.