925.999.8757 rnassab@comcast.net

This particular vitamin is extremely important.
I hope this helps you understand it a little better.
What I found to be of interest is the lack of morning sun we all seem to be forgetting and now in fear of attaining.
Everything always works better with an adjustment.

Adequate Intake (AI) for Vitamin D Recommended
by the Institute of Medicine
Life Stage
Age
Males
mcg/day (IU/day)
Females
mcg/day (IU/day)
Infants
0-6 months
5 mcg (200 IU)
5 mcg (200 IU)
Infants
7-12 months
5 mcg (200 IU)
5 mcg (200 IU)
Children
1-3 years
5 mcg (200 IU)
5 mcg (200 IU)
Children
4-8 years
5 mcg (200 IU)
5 mcg (200 IU)
Children
9-13 years
5 mcg (200 IU)
5 mcg (200 IU)
Adolescents
14-18 years
5 mcg (200 IU)
5 mcg (200 IU)
Adults
19-50 years
5 mcg (200 IU)
5 mcg (200 IU)
Adults
51-70 years
10 mcg (400 IU)
10 mcg (400 IU)
Adults
71 years and older
15 mcg (600 IU)
15 mcg (600 IU)
Pregnancy all ages
5 mcg (200 IU)
Breast-feeding all ages
5 mcg (200 IU)

Vitamin D

Vitamin D is a fat-soluble vitamin that is essential for maintaining normal calcium metabolism . Vitamin D3 (cholecalciferol) can be synthesized by humans in the skin upon exposure to ultraviolet-B (UVB) radiation from sunlight, or it can be obtained from the diet.

Activation of Vitamin D
Vitamin D itself is biologically inactive, and it must be metabolized to its biologically active forms. After it is consumed in the diet or synthesized in the epidermis of skin, vitamin D enters the circulation and is transported to the liver.

Calcium Balance
Maintenance of serum calcium levels within a narrow range is vital for normal functioning of the nervous system, as well as for bone growth and maintenance of bone density. Vitamin D is essential for the efficient utilization of calcium by the body.

Immunity
Vitamin D in the form of 1,25(OH)2D is a potent immune system modulator. The vitamin D receptor (VDR) is expressed by most cells of the immune system, including T cells and antigen-presenting cells, such as dendritic cells and macrophages.

Muscle Weakness and Pain
Vitamin D deficiency causes muscle weakness and pain in children and adults.

Risk Factors for Vitamin D Deficiency
· Dark skin
· Aging
· Covering all exposed skin or using sunscreen whenever outside
· Fat malabsorption syndromes
· Inflammatory bowel disease
· Obesity