Facts about Vitamin A.. its function, sources, deficiency and intake level

1. Facts to know about
Vitamin- A

3. What is
Vitamin - A
• Vitamin A is a fat soluble vitamin
• It is a group of unsaturated nutritional
organic compounds, that includes retinol,
retinal and several pro vitamins A
carotenoids.
• Retinoids comes from animal source
• Beta Carotene comes from plant source

4. Functions of
Vitamin - A
• Maintain good vision, healthy immune
system.
• Important in growth of all body tissues
including skin, hair.
• Need for growth, development,
cell recognition and function.
• Stimulate the production and activity of
WBC.
• Helps to maintain healthy endothelial cells
and regulates its growth.

5. Deficiency
• Fatigue, susceptibility to infections.
• Xerophthalmia, severe dryness of the eye if
untreated leads to blindness.
• Nyctalopia or night blindness.
• Irregular patches on the white of the eyes.
• Dry hair, dry skin.

6. Food Sources

8. Side effects
when Vitamin -
A exceeds
• The tolerable intake of vitamin a is 3000
mcg.
• If it exceeds more it becomes toxicity and
leads to several other disorder.
• It interfere with beneficial actions of Vitamin
D.
• Vision change, such as blurry sight.
• Bone pain.
• Dry skin and sensitivity to bright light like
sunlight.

9. Recommended Intake Level

10. Thank You