What is Vitamin D?

Category: Supplements

Most popular types: Vitamin D Prescription NatureMade Vitamin D CVS Vitamin D Show all

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Vitamin D is a fat-soluble vitamin that was isolated in 1930 and named calciferol. Since then more metabolites have been found and the two major forms of this vitamin are now known to be vitamin D2 (ergocalciferol) and vitamin D3 (cholecalciferol).

Reported purpose & perceived effectiveness
Purpose Patients Evaluations Perceived Effectiveness
General health 871 216
Multiple sclerosis 691 151
Osteopenia 133 45
Fatigue 130 37
Fibromyalgia 130 34

Show all 165 reasons taken


  • Major
  • Moderate
  • Slight
  • None
  • Can't tell

Side effects

Side effects as an overall problem

Side effects as an overall problem
Severity Evaluations
Severe 14
Moderate 16
Mild 34
None 821

Commonly reported side effects and conditions associated with Vitamin D

Side effect Patients
Nausea 5
Abdominal bloating 4
Depressed mood 3
Dizziness 3
Headaches 3
Diarrhea 2

Show all 36 reported side effects

Dosages

Based on patients currently taking Vitamin D

Dosage Patients
5,000 intl units daily 89
2,000 intl units daily 71
1,000 intl units daily 69
400 units daily 37
4,000 intl units daily 34
2,000 mg daily 26
1,000 mg daily 24
400 intl units daily 23
5,000 mg daily 23
50,000 intl units weekly 23

See all 217 dosages

Why patients stopped taking Vitamin D

Multiple reasons could be selected

Reason Patients
Other 112
Course of treatment ended 92
Doctor's advice 64
Did not seem to work 39
Expense 28
Personal research 20
Side effects too severe 11
Change in health plan coverage 1
See all 331 patients who've stopped taking Vitamin D

Duration

Currently taking Vitamin D

Duration Patients
Less than 1 month 2
1 - 6 months 26
6 months - 1 year 26
1 - 2 years 58
2 - 5 years 219
5 - 10 years 429
10 years or more 141

Stopped taking Vitamin D

Duration Patients
Less than 1 month 29
1 - 6 months 100
6 months - 1 year 61
1 - 2 years 63
2 - 5 years 62
5 - 10 years 19
10 years or more 1
Adherence
Adherence Evaluations
Always 620
Usually 189
Sometimes 46
Never taken as prescribed 30
Burden
Burden Evaluations
Very hard to take 7
Somewhat hard to take 32
A little hard to take 90
Not at all hard to take 756
Cost per month
Cost per month Evaluations
$200+ 2
$100-199 1
$50-99 1
$25-49 22
< $25 466
Not specified 393

What people switch to and from

Patients stopped taking Vitamin D and switched to:

Treatment Patients
Vitamin D3 (calcitriol) (NatureMade Vitamin D3) 1
Last updated:

98 patient evaluations for Vitamin D

Feb 5, 2016 (Started Jan 15, 2014)

  • Effectiveness
    Can't tell (for vitamin D deficiency)
  • Effectiveness
    Major (for seasonal affective disorder)
  • Side effects
    None
  • Adherence
    Always
  • Burden
    A little hard to take
Dosage: 400 intl units Daily
Advice & Tips: Really improves my outlook in the dark, often gloomy days of winter. 

  • 0 helpful marks

Dec 15, 2015 (Started Dec 08, 2012)

  • Effectiveness
    Can't tell (for vitamin D deficiency)
  • Side effects
    None
  • Adherence
    Always
  • Burden
    Not at all hard to take
Dosage: 2000 mg Daily

  • 0 helpful marks

Jul 1, 2014 (Started Nov 29, 2008)

  • Effectiveness
    Major (for vitamin D deficiency)
  • Side effects
    None
  • Adherence
    Always
  • Burden
    Not at all hard to take
Dosage: 2000 intl units Daily
Advice & Tips: became toxic

  • 0 helpful marks
Last updated:
Showing 3 of 98 patient evaluations for Vitamin D