Introduction to the themed issue 'Vitamin D update

摘要

This collection of papers brings an update on several issues surrounding the potential for increased vitamin D status to provide better health. It acknowledges that vitamin D can modulate multiple tissue responses, including cell metabolism, cell growth and differentiation, tissue repair, and immune regulation. It also confronts the current controversies of how much vitamin D humans require, how to increase vitamin D levels most effectively, how to understand both the immune-enhancing and suppressing effects of vitamin D, and how to relate vitamin D status to specific disease states.