Vitamin D and Health - Havard Advice

Vitamin D and Health - What Should I Eat? - The Nutrition Source - Harvard School of Public Health

More on Vitamin D

If you live north of the line connecting San Francisco to Philadelphia and Athens to Beijing, odds are that you don't get enough vitamin D. The same holds true if you don't get outside for at least a 15-minute daily walk in the sun. African-Americans and others with dark skin, as well as older individuals, tend to have much lower levels of vitamin D, as do people who are overweight or obese.

Worldwide, inadequate vitamin D is common, and deficiencies can be found on all continents, in all ethnic groups, and across all ages. Some surveys suggest that perhaps half of the world’s population has inadequate blood levels of vitamin D. (1-3) Indeed, in industrialized countries, doctors are even seeing the resurgence of rickets, the bone-weakening disease that had been largely eradicated through vitamin D fortification. (4-6)

Vitamin D and Health - What Should I Eat? - The Nutrition Source - Harvard School of Public Health

Vegan Vitamin D3