Sunlight on Vitamin D
One study found that vitamin D levels appear lower among Americans than 15 to 20 years ago. The decline in vitamin D levels is attributed to these factors: increasing body weight, declining milk consumption, and increasing use of sun protection.
How to get your RDA of Vitamin D?
- Daily sun exposure of 10-15 minutes in non-peak hours may provide adequate vitamin D
- People who use sun protection (Don't we all?) need more time in the sun or other sources of vitamin D.
- Dietary sources of vitamin D:
- Fatty fish (also a good source of Omega 3)
- egg yolks
- fortified foods (toxicity from fortified foods is rare
- Vitamin D supplements at currently recommended doses can increase vitamin D levels in the body. There is wide diversity (600%) in human absorption of vitamin D (mostly related to weight)
- Shedding light on vitamin D (mayoclinic.com)
- Dietary Reference Intakes for Vitamin D and Calcium (iom.edu)
- US Government Food and Nutrition Information Center (usda.gov)
- USDA Reference Daily Intakes (usda.gov)
- Calcium, Vitamin D Pills Don't Help Heart (nlm.nih.gov)
- 'Guiding Stars' Food Label Program Seems to Boost Healthful Food Sales (usnews.com)
- High-Dose Vitamin C May Boost Women's Cataract Risk (nlm.nih.gov)
- Vitamin D Linked to Survival in Lymphoma Patients (nlm.nih.gov)
- Vital Signs: Nutrition: Chocolate Milk May Reduce Inflammation (nytimes.com)
- Coming Soon to a Restaurant Near You: Calories on the Menu (christ-web.com)
- Blog posts by Dr. Mercola (blogs.mercola.com)