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 164 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 823

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 92
2,000 intl units daily 73
1,000 intl units daily 71
400 units daily 38
4,000 intl units daily 33
2,000 mg daily 26
1,000 mg daily 25
5,000 mg daily 25
50,000 intl units weekly 23
400 intl units daily 22

See all 214 dosages

Why patients stopped taking Vitamin D

Multiple reasons could be selected

Reason Patients
Other 113
Course of treatment ended 92
Doctor's advice 63
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 24
6 months - 1 year 26
1 - 2 years 59
2 - 5 years 219
5 - 10 years 426
10 years or more 143

Stopped taking Vitamin D

Duration Patients
Less than 1 month 29
1 - 6 months 101
6 months - 1 year 61
1 - 2 years 63
2 - 5 years 61
5 - 10 years 19
10 years or more 1
Adherence
Adherence Evaluations
Always 621
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 757
Cost per month
Cost per month Evaluations
$200+ 2
$100-199 1
$50-99 1
$25-49 22
< $25 466
Not specified 395

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

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 98 patient evaluations for Vitamin D