Vitamin D

The further you live from the equator, the longer exposure you need to the sun in order to generate vitamin D. 
People with dark skin pigmentation may need 20 - 30 times as muchexposure to sunlight as fair-skinned people to generate the same amount of vitamin D. 
Sufficient levels of vitamin D are crucial for calcium absorption inyour intestines. Without sufficient vitamin D, your body cannot absorb calcium, rendering calcium supplements useless. 
Chronic vitamin D deficiency cannot be reversed overnight: it takesmonths of vitamin D supplementation and sunlight exposure to rebuildthe body's vitamin D stores. 
Even weak sunscreens (SPF=8) block your body's ability to generatevitamin D by 95%. 
It is impossible to generate too much vitamin D in your body from sunlight exposure: your body will self-regulate and only generate what it needs. 
If it hurts to press firmly on your sternum, you may very well be suffering from chronic vitamin D deficiency right now. 
Vitamin D is "activated" in your body by your kidneys and liver before it can be used. 
Having kidney disease or liver damage can greatly impair your body's ability to activate circulating vitamin D. 
The sunscreen industry doesn't want you to know that your body actually needs sunlight exposure because it would mean lower sales of sunscreen products. 
Even though vitamin D is one of the most powerful healing chemicals in your body, your body makes it absolutely free. No prescription required. 
Diseases and conditions cause by vitamin D deficiency: Osteoporosis is commonly caused by a lack of vitamin D, which greatly impairs calcium absorption. Sufficient vitamin D prevents prostate cancer, breast cancer, ovarian cancer, depression, colon cancer and schizophrenia."Rickets" is the name of a bone-wasting disease caused by vitamin D deficiency.Vitamin D deficiency may exacerbate type 2 diabetes and impair insulin production in the pancreas. 
Obesity impairs vitamin D utilization in the body, meaning obese people need twice as much vitamin D. 
Vitamin D is used around the world to treat Psoriasis. 
Vitamin D deficiency may be linked to one of the causes schizophrenia. 
Seasonal Affective Disorder is caused by a melatonin imbalance initiated by lack of exposure to sunlight. 
Chronic vitamin D deficiency is often misdiagnosed as fibromyalgia because its symptoms are so similar: muscle weakness, aches and pains. 
Your risk of developing serious diseases like diabetes and cancer is reduced 50% - 80% through simple, sensible exposure to natural sunlight 2-3 times each week. Infants who receive vitamin D supplementation (2000 units daily) have an 80% reduced risk of developing type 1 diabetes over the next twenty years.

Shocking Vitamin D deficiency statistics:

32% of doctors and med school students are vitamin D deficient. 
40% of the U.S. population is vitamin D deficient. 
42% of African American women of childbearing age are deficient in vitamin D. 
48% of young girls (9-11 years old) are vitamin D deficient. 
Up to 60% of all hospital patients are vitamin D deficient. 
76% of pregnant mothers are severely vitamin D deficient, causing widespread vitamin D deficiencies in their unborn children, which predisposes them to type 1 diabetes, arthritis, multiple sclerosis and schizophrenia later in life. Up to 80% of nursing home patients are vitamin D deficient.

We currently use a Vitamin D source that is emulsified which allows it to be absorbed directly into the gut without the need to be digested like most other Vitamin D supplements. Because Vitamin D is fat soluble, it must be digested with bile to become emulsified so it can be absorbed. People who have had their gall bladders removed may have impaired Vitamin D absorption.   