Vitamin A: functions and sources

09.12.2024.

Key functions of vitamin A (Retinol)

  • Supports the immune system: Helps your body’s natural defence against illness and infection.
  • Aids vision in dim light: Essential for maintaining proper eyesight.
  • Maintains healthy skin and mucous membranes: Keeps the skin and linings of organs like the nose healthy.

Sources of Vitamin A

Rich food sources of retinol (Vitamin A):

  • Cheese
  • Eggs
  • Oily fish
  • Fortified low-fat spreads
  • Milk and yoghurt
  • Liver and liver products (e.g., liver pâté):

Extremely rich in Vitamin A but should be consumed in moderation. Pregnant women should avoid liver due to the risk of excessive Vitamin A intake.

Beta-carotene sources (converted by the body into Vitamin A):

  • Vegetables: Spinach, carrots, sweet potatoes, and red peppers.
  • Fruits: Mango, papaya, and apricots.

Recommended daily intake of Vitamin A (NHS UK)

  • Men (19-64 years): 700 µg per day.
  • Women (19-64 years): 600 µg per day.

For future use, vitamin A is stored in the body, so daily consumption isn’t strictly necessary.

For personalized advice on your vitamin A intake or supplementation needs, it’s always best to consult your doctor or a qualified healthcare professional.

Risks of excessive Vitamin A intake

  • Long-term intake of more than 1.5 mg (1,500 µg) per day may weaken bones, increasing the risk of fractures, particularly in older adults.
  • Consuming liver or liver pâté more than once a week can result in excessive Vitamin A levels.
  • Multivitamins and fish liver oil supplements: Monitor your total Vitamin A intake from these sources to avoid exceeding 1.5 mg daily.

Special considerations:

Pregnancy: Excess Vitamin A can harm the unborn baby.

It is suggested to avoid supplements with Vitamin A, including fish liver oil unless advised by a healthcare professional.

A varied and balanced diet should provide all necessary Vitamin A.

Avoid excessive supplementation.

For older men and postmenopausal women (higher osteoporosis risk):

Limit total Vitamin A intake to no more than 1.5 mg daily from food and supplements.

Avoid liver more than once a week or take smaller portions.

Safe threshold: An average daily intake of 1.5 mg or less of Vitamin A from food and supplements is considered safe for most individuals.

For personalized advice on your vitamin A intake or supplementation needs, it’s always best to consult your doctor or a qualified healthcare professional


SOURCE

NHS UK

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