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 692 152
Osteopenia 133 46
Fatigue 130 37
Fibromyalgia 130 34

Show all 163 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 826

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 90
2,000 intl units daily 67
1,000 intl units daily 66
400 units daily 36
4,000 intl units daily 31
5,000 mg daily 27
2,000 mg daily 26
1,000 mg daily 23
400 intl units daily 21
50,000 intl units weekly 20

See all 205 dosages

Why patients stopped taking Vitamin D

Multiple reasons could be selected

Reason Patients
Other 114
Course of treatment ended 92
Doctor's advice 64
Did not seem to work 39
Expense 29
Personal research 20
Side effects too severe 12
Change in health plan coverage 2
See all 335 patients who've stopped taking Vitamin D

Duration

Currently taking Vitamin D

Duration Patients
1 - 6 months 21
6 months - 1 year 23
1 - 2 years 63
2 - 5 years 209
5 - 10 years 403
10 years or more 145

Stopped taking Vitamin D

Duration Patients
Less than 1 month 29
1 - 6 months 101
6 months - 1 year 61
1 - 2 years 64
2 - 5 years 61
5 - 10 years 21
10 years or more 2
Adherence
Adherence Evaluations
Always 624
Usually 190
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 91
Not at all hard to take 760
Cost per month
Cost per month Evaluations
$200+ 2
$100-199 1
$50-99 1
$25-49 22
< $25 468
Not specified 396
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