Vitamin D

Vitamin D

What Is Vitamin D?

Vitamin D is both a nutrient we eat and a substance that  our bodies make when exposed to sunlight.

It is a fat-soluble vitamin that can be stored by our body in fat tissues.

Benefits of Vitamin D

Supports bone health

Required for muscle strength

Important for immune system functioning

Reduces the risk of pregnancy complications1

Vitamin D is necessary for strong bones and muscles. Vitamin D helps with calcium absorption in small intestine which is essential for bone and muscle health. If Vitamin D is lacking, only 10-15% if dietary calcium is absorbed. In the vitamin D–sufficient state, the intestinal calcium absorption increases to 30% to 40%2.

Vitamin D plays a critical role in promoting immune responses as it affects the immune cell’s ability to fight infection. Vitamin D also modulates the immune system by reducing the risk of it attacking the body’s own tissues (e.g. in autoimmune disease)3.

Vitamin D supplementation during pregnancy may improve fetal growth and reduce the risks for low birth weight, preeclampsia, preterm birth, and gestational diabetes4.

Daily Recommended Intake of Vitamin D5

Age group

Vitamin D (mcg/day)

1-<7 years

10

7 years onwards and adults

2.5

Pregnant Woman

10

Lactating Woman

10

NOTE: 1 microgram (mcg) of vitamin D equals to 40 IU of vitamin D

Sources of Vitamin D

Sunlight

Fatty fish, seafood, mushroom, egg yolk

Vitamin D supplements, fortified milk and oral nutritional supplements

Signs And Consequences Of Vitamin D Deficiency

  • In adults: Loss of bone density (osteoporosis), falls and fractures, muscle weakness and fatigue, slow wound healing.
  • In children: Bone fragility that in in extreme cases may cause rickets. Rickets is a rare disease that causes the bones to become soft and bend.
  • In pregnant women: Increased risk of pregnancy complications like preeclampsia, low birth weight, poor postnatal growth4.

Did You Know?

According to the recent SHIELD study conducted in Singapore among 811 older adults, 52% had vitamin D deficiency or insufficiency5.

References:
KK Women’s and Children’s Hospital. https://www.kkh.com.sg/news/patient-care/kkh-researchers-study-links-between-bmi-and-vitamin-d-in-pregnancy. Assessed October 28, 2022
Khazai N et al. Curr Rheumatol Rep. 2008 Apr;10(2):110-7.
Hahn J et al. BMJ 2022; 376 :e066452
Palacios C et al. Cochrane Database of Systematic Reviews 2019, Issue 7. Art. No.: CD008873. DOI: 10.1002/14651858.CD008873.pub4. Accessed on October 28, 2022.
Singapore Health Promotion Board  https://www.healthhub.sg/live-healthy/192/recommended_dietary_allowances  Assessed on October 28, 2022
Cheong M et al. Nutrients. 2020 Oct 29;12(11):3329.

SG.2022.32504.AND -PND.1 (v1.0)

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