Vitamin B9, also referred to as folic
acid or folate, is one of the most essential vitamins belonging to the
class of B complex vitamins. This vitamin is probably best known for its
importance in pregnancy and fetal development.
Functions of Vitamin B9
Folic
acid is necessary for optimal brain functioning and has an important
role in the production of RNA and DNA. It plays an important role in the
development of the brain of the fetus during pregnancy. Pregnant
mothers are given supplemental doses of folic acid so that there is
appropriate development of the fetus and also to prevent neural tube
defects (birth defects). Folic acid is also essential for the rapid
growth of the cells during pregnancy, infancy and adolescence.
Vitamin B9 works in conjunction with
other vitamins such as vitamin B12 for the production of RBCs, and
maintains the functioning of iron in the body. It also works with
vitamin B6 and B12 to control the serum levels of homocysteine, an
essential amino acid. Therefore, vitamin B9 has also been found to be
important in maintaining the functioning of the heart as it controls the
level of homocysteine. Increase in the level of homocysteine in the
blood indicates heart dysfunctioning.
Food Sources of Vitamin B9
Rich sources of vitamin B9 include:
- dark green leafy vegetables such as spinach
- asparagus
- fenugreek leaves
- sprouts
- mustard greens
- turnips
- beetroots
- soya beans
Other sources are:
- beef liver
- yeast
- salmon
- whole grains
- root vegetables
- wheat
- kidney beans
- whole pulses
- lima beans
- avocado
- orange juice and milk
Symptoms of Vitamin B9 Deficiency
Folic acid deficiency occurs when the
newborn baby does not receive enough of this vitamin in the womb. A
fetus that has received insufficient quantities of folic acid has strong
possibilities of being born with spina bifida and may also suffer from
serious defects of the nervous system.
Deficiency of folic acid may also lead to the following:
- occurrence of acne
- cracked lips
- cracking on the corners of the mouth
- sore tongue
- feeling of tiredness
- nausea
Deficiency for a long period of time would lead to the following:
- osteoporosis
- anemia
- chronic fatigue syndrome
- high blood pressure
- Alzheimer’s disease
- cancer of the cervix, rectum and bowel
Folic acid has many roles to play in the
development of bones and iron uptake by the cells. Hence its deficiency
may lead to malfunctioning of the vital systems.
Dosage of Vitamin B9 Supplements
Dietary sources available for folic acid
should be sufficient for all individuals except pregnant women as they
need extra supplementation during the first trimester of pregnancy. The
adequate intake for infants and RDA for children and adults is as
follows. It needs to be understood here that for infants the vitamin
requirements and/or any other nutrient requirements is met through
breast milk, but if the child is not breastfed due to some reason then
supplementation may be required.
Infants
- 0 – 6 months: 65mcg / day (reads as 65 microgram per day)
- 7 – 12 months: 80mcg/day
Children
- 1 – 3 years: 150mcg/day
- 4 – 8 years: 200mcg/day
- 9 – 13 years: 300mcg/day
- 14 – 18 years: 400mcg/day
Adults
- 19 years and above: 400mcg/day
- Pregnant women: 600 mcg/day
- Lactating mothers: 500mcg/day
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