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What is Vitamin A?

Category: Supplements

Most popular types: Beta-carotene Retinol NOW Vitamin A

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See also: Migrasol Vitamin Supplements

Vitamin A is an essential human nutrient and refers to a family of similarly shaped molecules: the retinoids. Although Vitamin A is found only in foods of animal origin, some fruits and vegetables contain compounds, called cartenoids, that can be converted into vitamin A by your body.

See patients taking Vitamin A

Reported purpose & perceived effectiveness
Purpose Patients Evaluations Perceived Effectiveness
Macular degeneration 57 1
General health 45 5
Retinitis pigmentosa 35 1
Amyotrophic lateral sclerosis 13 4
Erythropoietic protoporphyria 4 0

Show all 25 reasons taken

  • Major
  • Moderate
  • Slight
  • None
  • Can't tell
See all 344 patients that have taken Vitamin A

Side effects

Side effects as an overall problem

Side effects as an overall problem
Severity Evaluations Percentage
Severe 0
Moderate 0
Mild 0
None 18

Commonly reported side effects and conditions associated with Vitamin A

Side effect Patients Percentage

Why patients stopped taking Vitamin A

Multiple reasons could be selected

Reason Patients Percentage
Other 12
Did not seem to work 8
Doctor's advice 2
Expense 2
Personal research 2
Change in health plan coverage 1
Course of treatment ended 1
Side effects too severe 1
See all 25 patients who've stopped taking Vitamin A

Duration

Stopped taking Vitamin A

Duration Patients Percentage
1 - 6 months 8
6 months - 1 year 2
1 - 2 years 7
2 - 5 years 5
5 - 10 years 3
Adherence
Adherence Evaluations Percentage
Always 15
Usually 2
Sometimes 0
Never taken as prescribed 1
Burden
Burden Evaluations Percentage
Very hard to take 0
Somewhat hard to take 2
A little hard to take 3
Not at all hard to take 13
Cost per month
Cost per month Evaluations Percentage
$200+ 0
$100-199 0
$50-99 1
$25-49 0
< $25 12
Not specified 5
Last updated:

7 patient evaluations for Vitamin A

Sort by: Most recent

Jul 7, 2017 (Started May 15, 2016)

  • Effectiveness
    Can't tell (for amyotrophic lateral sclerosis)
  • Side effects
    None
  • Adherence
    Always
  • Burden
    Not at all hard to take
Dosage: 10,000 unt Daily
Advice & Tips: Pellentesque habitant morbi tristique senectus et netus et malesuada fames ac turpis egestas. Phasellus faucibus turpis sed mi maximus mattis.
Cost: < $25 monthly

Oct 10, 2016 (Started May 15, 2016)

  • Effectiveness
    Can't tell (for amyotrophic lateral sclerosis)
  • Side effects
    None
  • Adherence
    Always
  • Burden
    Not at all hard to take
Dosage: 10,000 unt Daily
Cost: < $25 monthly
  • 0 helpful marks

Jan 4, 2015 (Started Mar 24, 2013)

  • Effectiveness
    Moderate (for bronchitis)
  • Effectiveness
    Major (for vitamin deficiency)
  • Side effects
    None
  • Adherence
    Always
  • Burden
    Not at all hard to take
Dosage: As needed
Cost: < $25 monthly

Apr 12, 2013 (Started Mar 24, 2013)

  • Effectiveness
    Moderate (for bronchitis)
  • Side effects
    None
  • Adherence
    Always
  • Burden
    Not at all hard to take
Dosage: 1500 intl units Daily
Cost: < $25 monthly
  • 0 helpful marks

Jan 10, 2014 (Started Jul 25, 2013)

  • Effectiveness
    Can't tell (for improved vision)
  • Side effects
    None
  • Adherence
    Always
  • Burden
    Not at all hard to take
Advice & Tips: Pellentesque habitant morbi tristique senectus et netus et malesuada fames ac turpis egestas. Phasellus faucibus turpis sed mi maximus mattis.

Aug 15, 2012 (Started Jul 25, 2013)

  • Effectiveness
    None (for improved vision)
  • Side effects
    None
  • Adherence
    Never taken as prescribed
  • Burden
    Not at all hard to take
  • 0 helpful marks
Last updated:
Showing 3 of 7 patient evaluations for Vitamin A