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 897 226
Multiple sclerosis 700 153
Osteopenia 131 41
Fatigue 130 39
Fibromyalgia 130 34

Show all 169 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 Percentage
Severe 14
Moderate 16
Mild 35
None 837

Commonly reported side effects and conditions associated with Vitamin D

Side effect Patients Percentage
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 Percentage
5000 intl units daily 62
2000 intl units daily 56
1000 intl units daily 49
400 units daily 36
1000 mg daily 18
2000 mg daily 18
400 intl units daily 17
5000 mg daily 16
4000 intl units daily 14
50000 intl units weekly 14

See all 155 dosages

Why patients stopped taking Vitamin D

Multiple reasons could be selected

Reason Patients Percentage
Other 116
Course of treatment ended 91
Doctor's advice 66
Did not seem to work 37
Expense 28
Personal research 21
Side effects too severe 12
Change in health plan coverage 2
See all 333 patients who've stopped taking Vitamin D

Duration

Currently taking Vitamin D

Duration Patients Percentage
1 - 6 months 9
6 months - 1 year 11
1 - 2 years 34
2 - 5 years 141
5 - 10 years 223
10 years or more 172

Stopped taking Vitamin D

Duration Patients Percentage
Less than 1 month 28
1 - 6 months 101
6 months - 1 year 62
1 - 2 years 63
2 - 5 years 71
5 - 10 years 22
10 years or more 3
Adherence
Adherence Evaluations Percentage
Always 631
Usually 192
Sometimes 48
Never taken as prescribed 31
Burden
Burden Evaluations Percentage
Very hard to take 7
Somewhat hard to take 31
A little hard to take 93
Not at all hard to take 771
Cost per month
Cost per month Evaluations Percentage
$200+ 2
$100-199 1
$50-99 1
$25-49 22
< $25 469
Not specified 407
Last updated:

96 patient evaluations for Vitamin D

Jan 17, 2018 (Started Jun 30, 2012)

  • Effectiveness
    Can't tell (for multiple sclerosis)
  • Side effects
    None
  • Adherence
    Always
  • Burden
    Not at all hard to take
Dosage: 7000 mg Daily

Apr 23, 2015 (Started Jun 30, 2012)

  • Effectiveness
    Can't tell (for multiple sclerosis)
  • Side effects
    None
  • Adherence
    Usually
  • Burden
    Not at all hard to take
Dosage: 5000 intl units Daily

  • 0 helpful marks

Jan 17, 2018 (Started Dec 15, 2017)

  • Effectiveness
    Major (for multiple sclerosis)
  • Side effects
    None
  • Adherence
    Always
  • Burden
    Not at all hard to take
Dosage: 10000 intl units Daily
Advice & Tips: Neuro didn't prescribe this and I've taken it on my own through a lot of research. The biggest plus has been on my mental fitness while taking this drug-I don't feel like the brain fog has such control over me. I don't feel like I'm forgetting as much, either, as I had been. I really, really am happy with the results of taking Vitamin D. It took two to three weeks to notice any difference and I'm starting to notice more and more after about five weeks on it. Really excited about the progress with this!

  • 0 helpful marks

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
Last updated:
Showing 3 of 96 patient evaluations for Vitamin D