Global Vitamin D Deficiency
The research from the University of South Australia summarizes that although severe deficiency of vitamin D (in the US defined as <12 ng/nL in the blood) is relatively rare, a deficient level of <20 ng/mL is common. For example, deficiencies are as follows: 23% for Australia, 24% for the United States, 37% for Canada, 6-76% for Europe and 6-70% for Southeast Asia.
Vitamin D Deficiency in the U.S.
Back in 2014, researchers Cristina Palacios and Lilliana Gonzalez published an article with a global overview of vitamin D deficiency. According to this overview, a total of 40-43% of adults in the U.S. have an insufficient content of vitamin D in the blood, of which 6% have a major deficiency. However, 39% of pregnant or lactating women in the US are deficient, of which 5% are categorized as severely deficient as defined above.
The two researchers conclude that vitamin D deficiency is a global public health problem in all age groups, especially in the Middle East, where there is otherwise enough sun.
Cardiovascular Disease Widespread and Expensive
When we compare the low content of vitamin D with the proportion of cardiovascular disease, the consequence is quite serious, as cardiovascular disease worldwide is estimated to account for almost 18 million annual deaths globally. In addition, the healthcare costs associated with cardiovascular disease are among the highest.
The researchers conclude that a normalization of vitamin D deficiency will have a strong effect on cardiovasclar health. The study used data from 267,980 subjects. It provides strong evidence to suggest mandatory screening and for offering vitamin D3 supplementation for cardiovasclar patients in case of a deficiency.