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 866 214
Multiple sclerosis 691 151
Osteopenia 131 45
Fibromyalgia 130 34
Fatigue 129 36

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 828

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 37 reported side effects

Dosages

Based on patients currently taking Vitamin D

Dosage Patients
5,000 intl units daily 95
1,000 intl units daily 75
2,000 intl units daily 72
400 units daily 42
4,000 intl units daily 35
1,000 mg daily 26
2,000 mg daily 26
400 intl units daily 25
5,000 mg daily 25
50,000 intl units weekly 25

See all 206 dosages

Why patients stopped taking Vitamin D

Multiple reasons could be selected

Reason Patients
Other 112
Course of treatment ended 93
Doctor's advice 61
Did not seem to work 39
Expense 27
Personal research 18
Side effects too severe 11
Change in health plan coverage 1
See all 325 patients who've stopped taking Vitamin D

Duration

Currently taking Vitamin D

Duration Patients
Less than 1 month 6
1 - 6 months 19
6 months - 1 year 26
1 - 2 years 56
2 - 5 years 231
5 - 10 years 444
10 years or more 135

Stopped taking Vitamin D

Duration Patients
Less than 1 month 29
1 - 6 months 99
6 months - 1 year 61
1 - 2 years 62
2 - 5 years 59
5 - 10 years 18
10 years or more 1
Adherence
Adherence Evaluations
Always 627
Usually 188
Sometimes 46
Never taken as prescribed 31
Burden
Burden Evaluations
Very hard to take 7
Somewhat hard to take 31
A little hard to take 89
Not at all hard to take 765
Cost per month
Cost per month Evaluations
$200+ 2
$100-199 1
$50-99 1
$25-49 22
< $25 474
Not specified 392

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