What is Vitamin D?

Category: Supplements

Most popular types: Vitamin D Prescription NatureMade Vitamin D Calciferol 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 1014 235
Multiple sclerosis 771 161
Osteopenia 298 41
Fatigue 154 39
Fibromyalgia 139 34

Show all 189 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 17
Mild 37
None 869

Commonly reported side effects and conditions associated with Vitamin D

Side effect Patients Percentage
Nausea 5
Abdominal bloating 4
Depressed mood 3
Diarrhea 3
Dizziness 3
Headaches 3

Show all 40 reported side effects

Dosages

Based on patients currently taking Vitamin D

Dosage Patients Percentage
2000 intl units daily 32
5000 intl units daily 32
1000 intl units daily 20
400 units daily 19
4000 intl units daily 9
400 intl units daily 7
1000 mg daily 7
5000 mg daily 7
50000 intl units weekly 7
50,000 unt weekly 6

See all 106 dosages

Why patients stopped taking Vitamin D

Multiple reasons could be selected

Reason Patients Percentage
Other 123
Course of treatment ended 92
Doctor's advice 67
Did not seem to work 40
Expense 31
Personal research 21
Side effects too severe 13
Change in health plan coverage 3
See all 346 patients who've stopped taking Vitamin D

Duration

Currently taking Vitamin D

Duration Patients Percentage
1 - 6 months 2
6 months - 1 year 6
1 - 2 years 13
2 - 5 years 75
5 - 10 years 99
10 years or more 95

Stopped taking Vitamin D

Duration Patients Percentage
Less than 1 month 28
1 - 6 months 101
6 months - 1 year 61
1 - 2 years 63
2 - 5 years 72
5 - 10 years 24
10 years or more 4
Adherence
Adherence Evaluations Percentage
Always 653
Usually 201
Sometimes 52
Never taken as prescribed 31
Burden
Burden Evaluations Percentage
Very hard to take 7
Somewhat hard to take 32
A little hard to take 95
Not at all hard to take 803
Cost per month
Cost per month Evaluations Percentage
$200+ 2
$100-199 1
$50-99 1
$25-49 24
< $25 474
Not specified 435

What people switch to and from

Patients started taking Vitamin D after stopping:

Treatment Patients Percentage
Calcium Magnesium and Vitamin D3 (GNC Calcium Plus with Magnesium and Vitamin D 3) 1
Dalfampridine (Ampyra) 1

Patients stopped taking Vitamin D and switched to:

Treatment Patients Percentage
Levothyroxine (Synthroid) 1
Last updated:

96 patient evaluations for Vitamin D

Feb 15, 2019 (Started Jul 01, 2015)

  • Effectiveness
    Moderate (for vitamin D deficiency)
  • Side effects
    None
  • Adherence
    Usually
  • Burden
    Not at all hard to take

Feb 15, 2018 (Started Jul 01, 2015)

  • Effectiveness
    Major (for vitamin D deficiency)
  • Side effects
    None
  • Adherence
    Always
  • Burden
    Not at all hard to take
Dosage: 1 capsule(s) 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