Tags: vitamin d | bone health | dosage | rda | iu

Vitamin D for Bone Health: Guidelines for the Right Dosage

Tuesday, 10 December 2013 11:25 PM

The innovation of vitamin D for bone health has been a breakthrough in health research. Its role in intestinal absorption of calcium and phosphate, which ensures bone health, is now well established. Vitamin D has been linked with the successful treatment of osteomalacia and rickets. We can find numerous vitamin D supplements available in the market in the forms of tablets, capsules, drops, and soft gels.
Many researchers opine that vitamin D is not recommended for people who get a sufficient quantity of vitamin D from their diet and sunlight. Others recommend it for many health issues, apart from bone health, such as cancer, heart health, immunity, pregnancy, and mental health. There is also great variation in calculating the correct dosage of vitamin D.

The National Health and Medical Research Council recommends the dosage for Australia and New Zealand. According to this council, the recommended daily allowance (RDA) is 5 micrograms for children and adults 19 to 50, 10 micrograms for adults 51 to 70, and 15 micrograms for adults older than 70.

European Food Information Council has determined the RDA dosage for Europeans as 5

For Canada, the dosage is different according to Health Canada. Health Canada mentions the RDA in terms of international units (IU) as follows: 400 IU for infants (0-12 months), 600 IU for persons 1 to 70, 800 IU for persons older than 70. A dosage of 600 IU is also  recommended during pregnancy and lactation.
The Institute of Medicine (IOM) in the United States considers vitamin D essential for bone health and recommends its dosage according to the age of user. The IOM suggests an RDA dosage, similar to that provided by Health Canada. Infants require a dosage of 400 IU; persons 1 to 70 should take 600 IU; and persons older than 70 need 800 IU.

All authorities agree on the safe upper limit of dosage of vitamin D3 as 10,000 IU or 250 micrograms per day.

The RDA for vitamin D is also available based on the diseases a person may be suffering from. For deficiency states, a vitamin D dosage of at least 1,000 IU daily or 8,400 IU per week is recommended. This RDA dosage is beneficial even for the target group for cancer prevention.

For fracture prevention, an RDA dosage of 400-1,100 IU of vitamin D is recommended for maintaining bone health. For multiple sclerosis, long-term intake in RDA dosage of 400 IU is recommended for bone health.

For cardiovascular patients, an oral dosage of 1,000 IU of vitamin D is recommended daily.

Some studies have shown that an RDA dosage of 400 to 800 IU of vitamin D improves the symptoms of depression that are associated with seasonal affective disorder (SAD).

The North American Menopause Society recommends taking vitamin D supplements along with hormone replacement therapy as beneficial for bone health. It can reduce the risk of hip fractures in menopausal women.

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Researches now confirm the role of vitamin D for bone health. However, they have prescribed different guidelines about its dosage. The recommended daily allowance (RDA) is expressed in terms of international units (IU) by many authorities, but there is a need for worldwide consensus.
vitamin d,bone health,dosage,rda,iu
Tuesday, 10 December 2013 11:25 PM
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