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 861 208
Multiple sclerosis 684 144
Osteopenia 130 44
Fibromyalgia 129 33
Fatigue 128 36

Show all 160 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 797

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
Upset stomach 3

Show all 45 reported side effects

Dosages

Based on patients currently taking Vitamin D

Dosage Patients
5,000 intl units daily 71
2,000 intl units daily 67
1,000 intl units daily 62
400 units daily 35
1,000 mg daily 28
4,000 intl units daily 24
5,000 mg daily 23
400 intl units daily 21
50,000 intl units weekly 21
2,000 mg daily 18

See all 195 dosages

Why patients stopped taking Vitamin D

Multiple reasons could be selected

Reason Patients
Other 106
Course of treatment ended 91
Doctor's advice 60
Did not seem to work 37
Expense 26
Personal research 18
Side effects too severe 11
Change in health plan coverage 1
See all 316 patients who've stopped taking Vitamin D

Duration

Currently taking Vitamin D

Duration Patients
Less than 1 month 3
1 - 6 months 28
6 months - 1 year 20
1 - 2 years 81
2 - 5 years 199
5 - 10 years 373
10 years or more 67

Stopped taking Vitamin D

Duration Patients
Less than 1 month 26
1 - 6 months 98
6 months - 1 year 62
1 - 2 years 59
2 - 5 years 58
5 - 10 years 16
10 years or more 1
Adherence
Adherence Evaluations
Always 606
Usually 181
Sometimes 44
Never taken as prescribed 30
Burden
Burden Evaluations
Very hard to take 7
Somewhat hard to take 30
A little hard to take 87
Not at all hard to take 737
Cost per month
Cost per month Evaluations
$200+ 2
$100-199 1
$50-99 1
$25-49 22
< $25 453
Not specified 382

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:

97 patient evaluations for Vitamin D

Aug 10, 2017 (Started Jan 15, 2011)

  • Effectiveness
    Can’t tell (for Parkinson's disease)
  • Side effects
    None
  • Adherence
    Always
  • Burden
    Not at all hard to take
Dosage: 5000 mcg Weekly
Cost: < $25 monthly

May 25, 2017 (Started Jan 15, 2011)

  • Effectiveness
    Can’t tell (for Parkinson's disease)
  • Side effects
    None
  • Adherence
    Always
  • Burden
    Not at all hard to take
Dosage: 5000 mcg Weekly

Jan 17, 2017 (Started Jan 15, 2011)

  • Effectiveness
    None (for Parkinson's disease)
  • Side effects
    None
  • Adherence
    Always
  • Burden
    Not at all hard to take
Dosage: 5000 mcg Weekly

Oct 10, 2016 (Started Jan 15, 2011)

  • Effectiveness
    Slight (for Parkinson's disease)
  • Side effects
    None
  • Adherence
    Always
  • Burden
    Not at all hard to take
Dosage: 5000 mcg Weekly

  • 0 helpful marks

May 26, 2017 (Started Jul 01, 2009)

  • Effectiveness
    Can’t tell (for General health)
  • Side effects
    None
  • Adherence
    Never taken as prescribed
  • Burden
    Not at all hard to take
Dosage: 3000 intl units Daily

Jul 27, 2010 (Started Jul 01, 2009)

  • Effectiveness
    None (for General health)
  • Side effects
    None
  • Adherence
    Always
  • Burden
    Not at all hard to take
Dosage: 1000 intl units Daily

  • 0 helpful marks

May 23, 2017 (Started Nov 15, 2015)

  • Effectiveness
    Slight (for General health)
  • Side effects
    None
  • Adherence
    Always
  • Burden
    Not at all hard to take
Dosage: 5000 mg Daily

Jan 28, 2017 (Started Nov 15, 2015)

  • Effectiveness
    Can’t tell (for General health)
  • Side effects
    None
  • Adherence
    Always
  • Burden
    Not at all hard to take
Dosage: 5000 mg Daily

  • 0 helpful marks
Last updated:
Showing 3 of 97 patient evaluations for Vitamin D