LECTURE OUTLINE
• Reasons for studying vitamins
• Concepts of vitamins.
• Importance of vitamins.
• Vitamins and disorders in farm animals
CONCEPT OF VITAMINS
Vitamins and minerals are micronutrients required by the body to carry out a
range of normal functions.
IMPORTANCE OF STUDYING VITAMINS IN ANIMAL SCIENCE
1. Maintaining Animal Health and Well-being:
Essential for Normal Physiological Functions:
• Vitamins are required for a wide range of bodily functions, including
growth, development, and reproduction.
• Ruminants, like cattle, can synthesize vitamin K and some B vitamins (like
B12 with the help of cobalt) in their rumen, but other vitamins like A, D, and
E need to be supplemented in their diet.
• Some vitamins, like vitamin A, can be synthesized from precursors like
betacarotene found in plants.
,
Vitamin A (retinol), for instance, is essential for vision, immune function,
reproduction, and growth. It's vital for dairy cows, as it affects milk
production and fetal development. Sources include green forages, which
animals convert from beta-carotene.
• Vitamin D (cholecalciferol) plays a vital role in calcium and phosphorus
absorption, crucial for bone health and preventing rickets in young
animals. Sunlight exposure allows animals to synthesize vitamin D.
• Vitamin E (tocopherol) is a powerful antioxidant that protects cells and
tissues from damage. It also plays a role in immune function, reproduction,
and muscle health, helping to prevent conditions like white muscle disease.
Fresh forages are a good source, but levels decrease in stored
feed.
• Several vitamin deficiencies in farm animals can lead to stunted growth and
other health issues.
• For example, Vitamin A deficiency can cause night blindness and skin
problems, while Vitamin D deficiency can result in rickets, a condition
causing bone deformities.
• Selenium and Vitamin E deficiencies are linked to muscular dystrophy and
retained fetal membranes in cattle.
• Additionally, Vitamin B12 deficiency can lead to anemia and neurological
issues.
,• Animal disease example:
• White Muscle Disease: Caused by deficiencies in selenium and/or vitamin
E.
• Affects cattle of all ages, but particularly newborns and those turned out to
pasture with increased exercise.
• Symptoms: Inability to rise, stiff gait, pale or discolored muscles with white
streaks, and in severe cases, sudden death due to heart failure.
• Polioencephalomacia: Caused by a deficiency in thiamine (vitamin B1).
• Caused by a deficiency in thiamine (vitamin B1).
• Symptoms: Inability to rise, stiff gait, pale or discolored muscles with white
streaks, and in severe cases, sudden death due to heart failure.
A SHEEP SUFFERING FROM POLYENCEPHALOMACIA
,
So, it is important for the animal scientist to fortify farm animals’ feeds with
vitamin supplements for effective growth and overall well-being.
Supplementation and Management:
• Forage quality: Good quality, fresh forages provide adequate vitamins for
grazing livestock.
• Supplementation: When animals are not on pasture or when stored forages
are used, supplementation may be necessary.
• Stress factors: Times of stress, like weaning or disease challenges, can
increase vitamin requirements.
• Water or feed delivery: Vitamins can be supplemented through drinking
water or incorporated into feed rations.
2. OPTIMIZING ANIMAL PRODUCTION: Understanding vitamin requirements
is crucial for formulating balanced diets that support optimal growth,
reproduction, and milk production in livestock.
• By ensuring adequate vitamin intake, farmers can improve feed efficiency,
increase meat or egg production, and reduce mortality rates.
• For example:
• In Dairy: Vitamin A and D are critical for milk production and overall health.
Cows may need supplementation when fed stored forages or during
periods of high milk production.
• Reasons for studying vitamins
• Concepts of vitamins.
• Importance of vitamins.
• Vitamins and disorders in farm animals
CONCEPT OF VITAMINS
Vitamins and minerals are micronutrients required by the body to carry out a
range of normal functions.
IMPORTANCE OF STUDYING VITAMINS IN ANIMAL SCIENCE
1. Maintaining Animal Health and Well-being:
Essential for Normal Physiological Functions:
• Vitamins are required for a wide range of bodily functions, including
growth, development, and reproduction.
• Ruminants, like cattle, can synthesize vitamin K and some B vitamins (like
B12 with the help of cobalt) in their rumen, but other vitamins like A, D, and
E need to be supplemented in their diet.
• Some vitamins, like vitamin A, can be synthesized from precursors like
betacarotene found in plants.
,
Vitamin A (retinol), for instance, is essential for vision, immune function,
reproduction, and growth. It's vital for dairy cows, as it affects milk
production and fetal development. Sources include green forages, which
animals convert from beta-carotene.
• Vitamin D (cholecalciferol) plays a vital role in calcium and phosphorus
absorption, crucial for bone health and preventing rickets in young
animals. Sunlight exposure allows animals to synthesize vitamin D.
• Vitamin E (tocopherol) is a powerful antioxidant that protects cells and
tissues from damage. It also plays a role in immune function, reproduction,
and muscle health, helping to prevent conditions like white muscle disease.
Fresh forages are a good source, but levels decrease in stored
feed.
• Several vitamin deficiencies in farm animals can lead to stunted growth and
other health issues.
• For example, Vitamin A deficiency can cause night blindness and skin
problems, while Vitamin D deficiency can result in rickets, a condition
causing bone deformities.
• Selenium and Vitamin E deficiencies are linked to muscular dystrophy and
retained fetal membranes in cattle.
• Additionally, Vitamin B12 deficiency can lead to anemia and neurological
issues.
,• Animal disease example:
• White Muscle Disease: Caused by deficiencies in selenium and/or vitamin
E.
• Affects cattle of all ages, but particularly newborns and those turned out to
pasture with increased exercise.
• Symptoms: Inability to rise, stiff gait, pale or discolored muscles with white
streaks, and in severe cases, sudden death due to heart failure.
• Polioencephalomacia: Caused by a deficiency in thiamine (vitamin B1).
• Caused by a deficiency in thiamine (vitamin B1).
• Symptoms: Inability to rise, stiff gait, pale or discolored muscles with white
streaks, and in severe cases, sudden death due to heart failure.
A SHEEP SUFFERING FROM POLYENCEPHALOMACIA
,
So, it is important for the animal scientist to fortify farm animals’ feeds with
vitamin supplements for effective growth and overall well-being.
Supplementation and Management:
• Forage quality: Good quality, fresh forages provide adequate vitamins for
grazing livestock.
• Supplementation: When animals are not on pasture or when stored forages
are used, supplementation may be necessary.
• Stress factors: Times of stress, like weaning or disease challenges, can
increase vitamin requirements.
• Water or feed delivery: Vitamins can be supplemented through drinking
water or incorporated into feed rations.
2. OPTIMIZING ANIMAL PRODUCTION: Understanding vitamin requirements
is crucial for formulating balanced diets that support optimal growth,
reproduction, and milk production in livestock.
• By ensuring adequate vitamin intake, farmers can improve feed efficiency,
increase meat or egg production, and reduce mortality rates.
• For example:
• In Dairy: Vitamin A and D are critical for milk production and overall health.
Cows may need supplementation when fed stored forages or during
periods of high milk production.
