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Need 3X more Vitamin D (or take semi-activated vitamin D) if have poor gut – small RCT May 2021

A pilot-randomized, double-blind crossover trial to evaluate the pharmacokinetics of orally administered 25-hydroxyvitamin D3 and vitamin D3 in healthy adults with differing BMI and in adults with intestinal malabsorption

Am J Clin Nutr. 2021 May 19;nqab123. doi: 10.1093/ajcn/nqab123
Nipith Charoenngam 1 2, Tyler A Kalajian 1, Arash Shirvani 1, Grace H Yoon 1, Suveer Desai 1, Ashley McCarthy 3, Caroline M Apovian 3, Michael F Holick 1
Vitamin D takes about 4 hours longer than Calcidiol to respond
Note - different measures



3,600 IU daily
Note: Calcidiol about 3 X better but at perhaps 100X the cost.
    3 X larger dose of vitamin D would probably result in similar response at far less cost
Note: There are many low-cost, gut-friendly forms of vitamin D

Overview Gut and vitamin D contains gut-friendly information

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 the bloodstream
Fat-soluble Vitamins go thru the slow lymph system
   you can make your own sublingual by dissolving Vitamin D in water or use nano form
Oil: 1 drop typically contains 400 IU, 1,000 IU, or 4,000 IU, typically not taste good
Topical – goes directly into the bloodstream. Put oil on your skin, Use Aloe vera cream with Vitamin D, or make your own
Vaginal – goes directly into the bloodstream. Prescription-only?
Bio-Tech might be usefulit is also water-soluble
Vitamin D sprayed inside cheeks (buccal spray) - several studies
    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


'Note: Vitamin D nanoemulsion (topical, swished in mouth, inhaled) may be much faster than both
VitaminDWiki had been testing various nanoemulsions since 2016%%%It appears that the initial response time for inhaled is 10 minutes and for topical is 2 hours
A pilot test of response times was planned for 2020, but COVID-19 happened

Nanoemulsion Vitamin D may be a substantially better form updated March 2019
Bought 6 kinds of Vitamin D Emulsion - March 2019
There are a variety of Vitamin D emulsions on Amazon (US) as of 2019
Bio Emulsion Forte is what I started buying in 2012.
I have given out 3 bottles (as of 2019) of it to friends with gut problems who were getting no benefit from standard vitamin D.
It worked well for them in each case

Since ~2017 I also have been purchasing Micro D3 Nanoemulsion for inhaled Vitamin D experiments
   see further down this page details on nutrasal.com product

In March 2019 I also purchased PreventiX, Hi-Pro Emulsi-D3, Bio-Emulsion-D3, and Liquid Vitamin D3
They were added because
1) They had good Amazon reviews
2) Were likely to have a micro/nano size,
3) Seemed to have a > 1,000 IU per drop.
4) Were fairly low cost (per 5,000 IU)

I also have been getting some Vitamin D Nanoemulsion from Bio-Tech Pharmacal since ~2016.
They are making it for some Vitamin D clinical trials, and I have used it for inhaled tests.
Bio-Tech Pharmacal emulsion is not (as of 2019) being sold commercially.
Note: March 2019 Dried beans and peas in meal appear to decrease uptake of oil-based Vitamin D
If you often eat pulses when supplementing with Vitamin D, you might need to have a non-oil-based vitamin D, such as in the above picture

Bioavailability of nanoemulsion formulations of Vitamin D3 – Nov 2019

Vitamin D nanoemulsion, with comments on COVID-19 – June 2, 2020

Nanoemulsion Vitamin D may be a substantially better form has the following comparison

50,000 IU powder in capsule
Example Biotech Pharmacal
Example micro D3
Average Cost
per day for 10,000 IU
4 cents8 cents
IU per serving 50,000 IU = capsule2,000 IU = drop
Servings if want average
of 10,000 IU/day
1 capsule
per 5 days
25 drops = 1 /4 teaspoon
per 5 days
Shelf life 1 year?6 months?
Add to food/drinkYes (powder) possiblly
Apply to skinNoYes
Swish in mouth
for fast response
Yes if put powder in saliva
or swish vitamin D water
Availability to cell
- better than bio-availability
standardperhaps 2X more
- due to small size
or activation of Vitamin D Receptor



Background: Obese and malabsorptive patients have difficulty increasing serum 25-hydroxyvitamin D [25(OH)D] after taking vitamin D supplementation. Since 25(OH)D is more hydrophilic than vitamin D, we hypothesized that oral 25(OH)D supplementation is more effective in increasing serum 25(OH)D concentrations in these patients.

Objectives: We aimed to investigate the pharmacokinetics of oral 25-hydroxyvitamin D3 [25(OH)D3] and oral vitamin D3 in healthy participants with differing BMI and malabsorptive patients.

Methods: A randomized, double-blind crossover trial was performed in 6 malabsorptive patients and 10 healthy participants who were given 900 µg of either vitamin D3 or 25(OH)D3 orally followed by a pharmacokinetic study (PKS). After ≥28 d from the first dosing, each participant returned to receive the other form of vitamin D and undergo another PKS. For each PKS, serum vitamin D3 and 25(OH)D3 were measured at baseline and at 2, 4, 6, 8, and 12 h and days 1, 2, 3, 7, and 14. Pharmacokinetic parameters were calculated.

Results: Data were expressed as means ± SEMs. The PKS of 900 µg vitamin D3 revealed that malabsorptive patients had 64% lower AUC than healthy participants (1177 ± 425 vs. 3258 ± 496 ng · h/mL; P < 0.05). AUCs of 900 µg 25(OH)D3 were not significantly different between the 2 groups (P = 0.540). The 10 healthy participants were ranked by BMI and categorized into higher/lower BMI groups (5/group). The PKS of 900 µg vitamin D3 showed that the higher BMI group had 53% lower AUC than the lower BMI group (2089 ± 490 vs. 4427 ± 313 ng · h/mL; P < 0.05), whereas AUCs of 900 µg 25(OH)D3 were not significantly different between the 2 groups (P = 0.500).

Conclusions: Oral 25(OH)D3 may be a good choice for managing vitamin D deficiency in malabsorption and obesity. This trial was registered at clinicaltrials.gov as (NCT03401541.

Created by admin. Last Modification: Wednesday May 26, 2021 23:18:06 GMT-0000 by admin. (Version 11)

Attached files

ID Name Comment Uploaded Size Downloads
15652 Holick response time Calcidiol vs Vitamin D.jpg admin 26 May, 2021 34.06 Kb 478
15651 Holick poor gut.jpg admin 26 May, 2021 30.22 Kb 342
15650 Holick high low BMI.jpg admin 26 May, 2021 12.79 Kb 329