^ Source ?
http://www.skepticalraptor.com/skept...ent/#more-8480
Vitamin D research seems very mixed and how many studies have been done with long term dosages of 4000IU ?
This is a classic J curve
This shows an increased mortality with higher amounts of serum Vitamin D. It is a large study.
http://press.endocrine.org/doi/10.12..._pub%3Dpubmed&