Recommended Dietary allowances (RDA) for vitamin D:

• Up to 12 months: 400 IU per day
• 1 year to 70 years: 600 IU per day
• Pregnancy & Nursing mothers: 600 IU per day
• 70 years and above: 800 IU per day.

Lack of vitamin D may not always exhibit symptoms and signs. Sometimes a person could have vitamin D deficiency but remains asymptomatic. In children vitamin D deficiency may causes rickets. Problems associated with lack of vitamin D vary from having weak or soft bones, bone pain, muscle pain, cramps and weakness, mood changes, depression to unhealthy growth patterns & joints deformities.

Those with such deficiency may be likely to get respiratory infections, or even autoimmune health problems.

Certain conditions may lead to vitamin D deficiency:

• Cystic fibrosis, Crohn’s disease, and celiac disease: Conditions that may hamper absorption of vitamin D.
• Kidney disease and liver disease: These conditions may reduce certain enzymes required for vitamin D conversion.
• Obesity: Vitamin D is kept isolated by the fat cells and its release may be affected. Those people having this condition may require larger doses of vitamin D to attain normal levels.

Vitamin D level could decrease with age. Those who have a darker skin colour may require higher sun exposure to make required vitamin D.

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