Detailed Introduction to Vitamin A

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1. Functions of Vitamin A

Vitamin A is a fat-soluble vitamin that plays several important roles in the human body:

• Maintains Healthy Vision: Vitamin A is a key component of rhodopsin, a pigment in the retina's photoreceptor cells, which helps with vision in low-light conditions. A deficiency can lead to night blindness.
  
• Boosts Immune Function: It strengthens the immune system and helps fight infections, especially those affecting the respiratory and digestive tracts.
  
• Supports Skin and Mucosal Health: Vitamin A maintains the integrity of the skin and mucous membranes in the respiratory, digestive, and urogenital tracts, acting as a barrier against pathogens.
  
• Promotes Growth and Development: It is crucial for the growth of bones and tissues, especially in children and adolescents.
  
• Antioxidant Role: Beta-carotene (a precursor of vitamin A) functions as an antioxidant that helps neutralize free radicals, potentially reducing the risk of chronic diseases.
  
• Supports Reproductive Health: It is essential for both male and female reproductive systems, helping with sperm production and fetal development.
  

2. Recommended Daily Intake for Adults


The Recommended Dietary Allowance (RDA) for vitamin A varies by age, sex, and physiological status. For adults:

Age Group (19+ years)

Men (μg RAE/day): 900

Women (μg RAE/day): 700

Note:

• 1 microgram (μg) of Retinol Activity Equivalents (RAE) = 1 μg retinol = 12 μg beta-carotene (from plants) = 24 μg other provitamin A carotenoids.
  
• Pregnant women need about 770 μg RAE/day; lactating women require about 1300 μg RAE/day.
  

Common dietary sources:

• Animal-based (rich in retinol): Liver (especially beef or chicken), cod liver oil, egg yolks, dairy products.
  
• Plant-based (rich in beta-carotene): Carrots, pumpkin, sweet potatoes, spinach, mangoes, papaya, tomatoes, etc.
  

3. Effects of Vitamin A Deficiency


A long-term deficiency can result in a range of health issues:

• Night Blindness: One of the earliest signs, affecting vision in low light.
  
• Dry Eye (Xerophthalmia): Decreased tear production, dry eyes, which may lead to corneal ulcers or even blindness if severe.
  
• Skin and Mucosal Problems: Dry, rough skin, higher susceptibility to infections in the respiratory or digestive tracts.
  
• Lowered Immunity: Increased risk of infections like pneumonia or diarrhea.
  
• Growth Retardation in Children: Vitamin A is essential for bone growth and development.
  

Vitamin A deficiency is more common in developing countries, especially in populations with poor diets or malnutrition.

4. Side Effects of Excessive Vitamin A Intake


Since vitamin A is fat-soluble, excess amounts can accumulate in the body, leading to toxicity (either acute or chronic):

• Acute Toxicity (short-term high intake):
  
  • Nausea, vomiting
    
  • Headache, dizziness
    
  • Blurred vision
    
  • Neurological symptoms (e.g., confusion)
    
• Chronic Toxicity (long-term excessive intake):
  
  • Bone problems (e.g., increased risk of osteoporosis and fractures)
    
  • Liver damage (elevated liver enzymes or liver failure)
    
  • Skin issues (dryness, peeling)
    
  • Hair loss
    
  • Birth defects (in pregnant women)
    

Tolerable Upper Intake Level (UL):


Age Group: Adults

3000 UL (μg RAE/day)

Summary

• Vitamin A is essential for vision, immunity, skin, bone health, and reproduction.
  
• The recommended intake is 900 μg RAE/day for adult men and 700 μg RAE/day for adult women, with higher needs during pregnancy and lactation.
  
• Deficiency may cause night blindness, immune dysfunction, dry skin, and delayed growth.
  
• Excessive intake, especially from supplements, can lead to serious side effects including liver damage and bone issues.
  
• The safest way to get vitamin A is through a diverse, balanced diet that includes both animal and plant sources.
  

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CarotoMix

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Suggested use:
For adults only. Take 1 capsule one time a day with a meal.
ANTIOXIDANT PROTECTION

Shaklee harnesses the antioxidant protection found in fruits, vegetables, and other plants by isolating and delivering more forms of natural carotenoids.

CarotoMix is a unique blend of natural concentrates to support healthy vision.*

Carotenoids are naturally occurring bright colour pigments found in fruits and vegetables with immense antioxidant benefits.

Carotenoids[/b] are naturally occurring bright colour pigments found in fruits and vegetables with immense antioxidant benefits especially on vision health. Here are the 4 beneficial carotenoids that you shouldn’t miss:

Alpha-carotene & Beta-carotene
Precursors to vitamin A. Enhance low light vision, relieve dry eyes by supporting tear production.

Lutein
One of the two major carotenoids found in your retina. Filter blue light from digital screens that cause blurry, tired, and dry eyes, as well as improve visual acuity.

Lycopene
Carotenoid that exhibits the most potent antioxidant activity. Protect the eyes from oxidative stress and support healthy eye aging.


Distributor Price: RM65.00
Retail Price: RM81.25I

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