Dr Costa: Private Children's Allergy Clinic
  • Home
  • About
    • Memberships
  • Services
    • Types of Allergy
    • Fees
  • Resources
  • Blog
  • Contact

Allergy Articles & Updates

Vitamin A absorption

4/28/2021

0 Comments

 
Vitamin A absorption
Vitamin A absorption
As we spoke before, 𝐕𝐢𝐭𝐚𝐦𝐢𝐧 𝐀 is 𝘧𝘢𝘵-𝘴𝘰𝘭𝘶𝘣𝘭𝘦.⁣⁣

We don’t eat Vit A, even in supplements.⁣⁣

When we consume fruits, vegetables or supplements, in reality, we are taking something called “𝘳𝘦𝘵𝘪𝘯𝘺𝘭 𝘦𝘴𝘵𝘦𝘳𝘴” (also known as preformed Vit A) or 𝘱𝘳𝘰𝘷𝘪𝘵𝘢𝘮𝘪𝘯 𝘈.⁣⁣

One way or another, they suffer alterations to become 𝘳𝘦𝘵𝘪𝘯𝘰𝘭𝘴. This is simply because those are easier absorbed in the small bowel.⁣⁣
  • As they are absorbed, small molecules called “𝐜𝐡𝐲𝐥𝐨𝐦𝐢𝐜𝐫𝐨𝐧𝐬” will transport them into the Liver.⁣⁣
  • If the Liver has reached its full capacity of Vitamin A, other small molecules called 𝐕𝐋𝐃𝐋 (𝘝𝘦𝘳𝘺 𝘓𝘰𝘸-𝘋𝘦𝘯𝘴𝘪𝘵𝘺 𝘓𝘪𝘱𝘰𝘱𝘳𝘰𝘵𝘦𝘪𝘯𝘴) will transport it (often already changed into retinyl palmitate) to other tissues.⁣⁣

Those tissues are mainly:⁣⁣
  1. Adipose tissue (AKA fat)⁣⁣
  2. Lungs⁣⁣
  3. Kidneys⁣⁣

















Another group of molecules called 𝐋𝐃𝐋 (𝘓𝘰𝘸-𝘋𝘦𝘯𝘴𝘪𝘵𝘺 𝘓𝘪𝘱𝘰𝘱𝘳𝘰𝘵𝘦𝘪𝘯𝘴) might also do that transport.⁣⁣

𝐕𝐞𝐫𝐲 𝐢𝐦𝐩𝐨𝐫𝐭𝐚𝐧𝐭 𝐭𝐨 𝐤𝐧𝐨𝐰:⁣⁣
  • VLDL and LDL are what is called “bad cholesterol”⁣⁣
  • ️HDL is what is called “good cholesterol”⁣⁣

Bear in mind any disease affecting the bowels (and I am referring to the 𝘴𝘮𝘢𝘭𝘭 𝘣𝘰𝘸𝘦𝘭) will affect fat absorption capacity. In turn, this will affect Vitamin A absorption as well.

Remember we spoke about Vit A being fat soluble?⁣⁣

Conditions that affect Vit A absorption:⁣⁣
  1. Cystic Fibrosis⁣⁣
  2. Pancreatic problems⁣⁣
  3. Inflammatory Bowel Disease⁣⁣
  4. Cholestasis (conditions preventing bile passing to the bowel, from the Liver)⁣⁣
  5. Small bowel bypass surgery⁣⁣
  6. Significant parasitic infestation⁣⁣
  7. Kidney problems⁣⁣
  8. Alcoholism⁣⁣
  9. Low fat in the diet⁣⁣

People with any of these conditions should take 𝐕𝐢𝐭 𝐀 𝐬𝐮𝐩𝐩𝐥𝐞𝐦𝐞𝐧𝐭𝐬.⁣⁣

When Vit A is not absorbed, it will be excreted in stools.⁣⁣
The one that becomes inactivated in the bloodstream will be excreted in the urine.⁣⁣

The big problem is that our body absorbs Vit A better than it destroys it.
This can lead to excessive accumulation and 𝐕𝐢𝐭 𝐀 𝐭𝐨𝐱𝐢𝐜𝐢𝐭𝐲.


www.facebook.com/permalink.php?story_fbid=151235170337036&id=100063516604410

Vitamin A storage
0 Comments



Leave a Reply.

    Author

    Dr Costa is a Consultant Paediatrician and fellow of the Royal College of Paediatrics and Child Health.

    Archives

    June 2022
    May 2022
    January 2022
    December 2021
    November 2021
    September 2021
    August 2021
    July 2021
    May 2021
    April 2021
    March 2021
    February 2021
    January 2021
    November 2020
    September 2020
    August 2020
    June 2020

    Categories

    All
    Adrenaline
    Airborne Allergies
    Allergens
    Allergic Reaction
    Allergic Rhinitis
    Allergies
    Allergy
    Allergy To Pets
    Anaphylaxis
    Antihistamines
    Asthma
    Auto-Injectors
    Breast Milk
    Chicken
    Chicken Allergy
    Coeliac Disease
    Contact Dermatitis
    COVID19 Vaccine
    Cow's Milk Protein Allergy
    Dinosaur
    Dog Allergy
    Eczema
    Egg
    Egg Allergy
    Egg Ladder
    Fish Allergy
    Flu Vaccine
    Food Allergy
    Food Allergy Labelling
    Food Industry
    Food Protein Induced Enterocolitis Syndrome
    Food Protein Induced Proctocolitis
    FPIES
    FPIP
    Gastroesophageal Reflux
    Gastroesophageal Reflux Disease
    GER
    GERD
    Guest Blog
    Gut Health
    Hayfever
    Histamine
    Histamine Intolerance
    Household Dust
    Immunotherapy
    Lactose Intolerance
    Mast Cell Activation Syndrome
    Mental Health
    Microbiome
    Middle East
    MMR Vaccine
    Neuritin
    Non Allergic Rhinitis
    Oral Allergy Syndrome
    Oxford AstraZeneca Vaccine
    Peanut Allergy
    Pfizer Vaccine
    Pollen Food Syndrome
    Probiotics
    Psychiatric Conditions
    Rabies Vaccine
    Shellfish Allergy
    Summer Camp
    United Arab Emirates
    Vaccination
    Vitamin A
    Vitamins
    Weaning
    Weaning With Reflux
    Wheat Allergy
    Yellow Fever Vaccine

    RSS Feed

Clinic Address: The Chase, Old Milverton Ln, Leamington Spa CV32 6RW
Email address: officedrcosta@gmail.com
​Contact number: 07949990798


Website design & content by LIT Communication: www.litcommunication.com
Picture
  • Home
  • About
    • Memberships
  • Services
    • Types of Allergy
    • Fees
  • Resources
  • Blog
  • Contact