Topics:
Animal Refresher, Dairy Science
Vitamin A Content of Colostrum vs Normal Milk
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Question (English)
Colostrum contains how many times the amount of Vitamin A found in normal milk?
- 5 – 15 times ✓ Correct
- 3 – 5 times
- 15 – 20 times
- 20 – 25 times
Explanation:
Correct Answer: 5 – 15 times
Colostrum (first milk / beestings) contains 5 to 15 times the amount of Vitamin A found in normal milk. This makes colostrum nutritionally superior and critical for the newborn calf's health.
Composition of Bovine Colostrum vs Whole Milk
| Constituent | Colostrum (%) | Whole Milk (%) |
|---|---|---|
| Water | 76 | 87 |
| Total Solids | 24 | 13 |
| Protein | 14.3 (6% Igs) | 3.2 (0.09% Igs) |
| Fat | 6.7 | 4.0 |
| Lactose | 2.7 | 5.0 |
| Ash | 1.1 | 0.7 |
Key Facts About Colostrum
- Rich in immunoglobulins (IgG > IgM > IgA), Vitamin A, Vitamin D, and lactoferrin.
- Predominant immunoglobulin in bovine colostrum is IgG; in human colostrum it is IgA.
- Contains a trypsin inhibitor that protects immunoglobulins from digestion in GIT of the calf.
- Milk loses its colostral properties within 72 hours (3–4 days) after calving.
- Acts as a laxative, helping clear meconium (first faeces of the newborn).
Why Other Options Are Wrong
- 3–5 times → underestimates the difference; too low.
- 15–20 times → overshoots the documented range.
- 20–25 times → not supported by standard references.
📚 About this Topic — Animal Refresher
This multiple choice question is from Animal Refresher, Dairy Science. It has 4 options with a detailed explanation of the correct answer. Practice more MCQs from Animal Refresher to strengthen your preparation.
