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Overview Gut and vitamin D

Did you know?
  • High level of vitamin D/UV reduces the risk of many gut problems
  • Many gut problems result in less absorption of Vitamin D & Magnesium . . .
    Not restoring Vitamin D levels increases the risk of many other diseases
  • Increasing Vitamin D reduces many inflammations - incude those of the gut
  • Several companies make gut-friendly forms of vitamin D
  • There are 168 items in the Gut category in Vitamin D Life
          (more GUT information below)

Learn how Vitamin D is essential for good health
  Watch a 5 minute video "Does Less Sun Mean more Disease?"
  Browse for other Health Problems and D in left column or here
  see also Supplementing and More in the menu at the top of every page
If you have a disease associated with low Vit D take Vit D
Raising your Vit D levels will substantially prevent other low-Vit D health problems
Often your specific health problem will also be treated


  • Gut problems result in reduced absorption of Vitamin D, Magnesium, etc.
  • Celiac disease has a strong genetic component.
    • Most, but not all, people with celiac disease have a gene variant.
    • An adequate level vitamin D seems to decrease the probability of getting celiac disease.
    • Celiac disease causes poor absorption of nutrients such as vitamin D.
    • Bringing the blood level of vitamin D back to normal in patients with celiac disease decreases symptoms.
    • The prevalence of celiac disease, not just its diagnosis, has increased 4X in the past 30 years, similar to the increase in Vitamin D deficiency.
  • Review in Nov 2013 found that Vitamin D helped
    Many intervention clinical trials with vitamin D for Gut problems (101 trials listed as of Sept 2019)
  • All items in category gut and vitamin D 168 items

See Vitamin D Life


87% of eating disorders got worse with COVID-19 - Aug 2020

Exploring the impact of the COVID-19 pandemic and UK lockdown on individuals with experience of eating disorders
UK study, FREE PDF

Celiac disease is the most common genetic disease in Europe.

In Italy about 1 in 250 people and in Ireland about 1 in 300 people have celiac disease.
from http://www.wrongdiagnosis.com/c/celiac_disease/prevalence.htm

Many gut diseases will do better with gut-friendly forms of Vitamin D

Gut-friendly, Sublingual, injection, topical, UV, sunshine

Getting Vitamin D into your body has the following chart

Getting Vitamin D into your body also has the following

If poorly functioning gut

Bio-D-Mulsion Forte – especially made for those with poorly functioning guts, or perhaps lacking gallbladder
Sublingual – goes directly into bloodstream
Oil: 1 drop typically contains 400 IU, 1,000 IU, or 4,000 IU, typically not taste good
Topical – goes directly into bloodstream. Put oil on your skin, Use Aloe vera cream with Vitamin D, or make your own
Vaginal – goes directly into bloodstream. Prescription only?
Bio-Tech might be usefulit is also water soluble
Vitamin D sprayed inside cheeks 2X more response (poor gut) – RCT Oct 2015
    and, those people with malabsorption problems had a larger response to spray
Inject Vitamin D quarterly into muscle, into vein, or perhaps into body cavity if quickly needed
Nanoparticles could be used to increase vitamin D getting to the gut – Oct 2015
Poor guts need different forms of vitamin D has the following
Guesses of Vitamin D response if poor gut

Bio FormSpeedDuration
10Injection ($$$)
or Calcidiol or Calcitriol
D - Slow
C -Fast
10 Sun/UVBSlowLong
(skin patch/cream, vagina)
Fast nano
9Nanoemulsion -mucosal
perhaps activates VDR
9?Inhaled (future)FastNormal
8Bio-D-Mulsion ForteNormalNormal
6Water soluble (Bio-Tech)NormalNormal
(some goes into gut)
3Coconut oil basedSlowNormal
2Food (salmon etc.)SlowNormal
2Olive oil based (majority)SlowNormal

10= best bioavailable, 0 = worst, guesses have a range of +-2
Speed: Fast ~2-6 hours, Slow ~10-30 hours
Duration: Long ~3-6 months, Normal = ~2 months

See also web


Celiac Disease is similar to Crohn's Disease in that both decrease vitamin D which can be absorbed in the gut

Celiac Disease may be similar to Crohn's Disease on the following chart

Possible Vitamin D Interactions

Feb 2014 review of IBD and Vitamin D is attached at the bottom of this page

Review of observational and intervention studies (generally using insignificant 1000 IU of vitamin D)

Vitamin D Council

IBS Vitamin D Council April 2013
Patient introduction to IBD: Vitamin D Council - June 2014

  • Some researchers think that low vitamin D levels may be a consequence of having IBD because the symptoms may cause you to stay indoors more and eat less.
  • However, studies have found that even people who are newly diagnosed with IBD tend to have low vitamin D levels.
    This means that low vitamin D levels may be a risk factor for developing IBD
  • . . it has been shown that there is a difference in the risk of developing IBD based on where you live and the amount of sun exposure you get.
  • Small 2013 Crohn’s disease study with 5,000 IU of Vitamin D
    All but 1 person had lower disease activity scores and higher quality of life after treatment.
    67% of the people went into remission.
  • Large 2013 IBD study: For every 1 ng/mL increase in vitamin D levels, there was a 6% decrease in risk of colorectal cancer.

How much vitamin D should individuals with Crohn’s disease supplement with? Feb 2018

Does Gluten-Free Diet Protect Children with Celiac Disease from Low Bone Density? - Aug 2014

 Download the PDF from Vitamin D Life.
They believe: CD ==> poor absorption ==> low vitamin D ==> low Bone Mineral Density
They conclude that if teen with CD has bone pain should have DXA test of BMD, then might consider giving vitamin D.

Poor Vitamin D2 absorption if poor gut - 1987

 Download the PDF from Vitamin D Life
5 patients had zero absorption, 2 were OK

Colon Diseases


Vitamin D levels OK months before Crohn's, but were low only after Crohn's

Crohn's and Colitis infographic




Overview Gut and vitamin D        
34636 visitors, last modified 28 Aug, 2020,
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Attached files

ID Name Comment Uploaded Size Downloads
10941 IBD vs IBS.jpg admin 01 Dec, 2018 13:25 29.38 Kb 3885
10469 Crohn's and Colitis.jpg admin 03 Sep, 2018 07:53 175.61 Kb 3057
9421 Colon Diseases.jpg admin 27 Feb, 2018 16:31 28.14 Kb 3176
7385 Optimal vitamin D levels in Crohn’s disease - a review.pdf PDF admin 24 Nov, 2016 15:16 1.40 Mb 889
5307 Cannabis Crohn's.pdf PDF admin 14 Apr, 2015 16:12 465.15 Kb 1655
5212 1987.jpg admin 22 Mar, 2015 16:54 87.79 Kb 5819
5211 Poor D2 absorption if poor gut - 1987.pdf PDF admin 22 Mar, 2015 16:49 1.29 Mb 1602
4125 CD and low vitamin D July 2014.pdf PDF 2014 admin 10 Jul, 2014 02:45 593.50 Kb 1911
3618 IBS Vitamin D Council.jpg admin 15 Feb, 2014 20:56 477.02 Kb 9056
3604 IBD - Feb 2014.pdf PDF 2014 admin 08 Feb, 2014 12:30 3.92 Mb 3333
2654 intestinal-microflora-gut-floria-health.jpg admin 26 Jun, 2013 17:19 37.90 Kb 9360
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