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"Vitamin D has become a very hot topic in medicine now as we are discovering very high levels of vitamin D deficiency in our population, not only in the U.S.,but worldwide" Vitamin D helps our bodies absorb calcium and helps form and maintain strong bones.

VOA: standard.2010.05.28

Strong and fast, they had good bones and a strong constitution for improving local horse stock.

ECONOMIST: Horses with wings

However, more important is that strong muscles maintain and produce stronger bones.

FORBES: Why Strength Training May Help You Live Longer

Our hollow, long bones are thick and strong where needed, and light and flexible where possible.

FORBES: Move up http://i.forbesimg.com t Move down