Active vitamin D levels can be temporarily raised 80 percent with Boron – US Patent Mar 2016

Calcium-fructoborate Amazon 5+suppliers Nov 2019

Raises Calcidiol levels by 80% in about 2 hours

US Patent 9,271,994 Pietrzkowski; Zbigniew,

VDF Futureceuticals ==> https://www.futureceuticals.com

Patent is by the Senior Vice President of Research and Development, Discovery and Clinical Science

Sent him an email Nov 10, 2019

Patent was found in Boron Compounds in the Breast Cancer Cells Chemoprevention and Chemotherapy - 2011
" Indeed, calcitriol levels could be increased almost 80% upon the oral administration of a single dose of a boron-containing complex (15-20 mg boron as calcium fructoborate per day) (Pietrzkowski, 2010)"
 Download the PDF from VitaminDWiki

2014 version of the patent

 Download the PDF from VitaminDWiki

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See also VitaminDWiki

Vitamin D and Boron contains the following

There are 30 Boron studies on this page and 37 additional Boron pages in VitaminDWiki

Boron by itself improves health in many ways if take at least 3 mg daily
Boron increases vitamin D in the blood in 10 of 11 people in a small pilot study
Boron improves magnesium absorption and may help vitamin D non-responders – Aug 2015
Boron also increases the Vitamin D which gets to the tissues
Vitamin D Cofactors in a nutshell
Overview Magnesium and vitamin D
Nothing Boring about Boron

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Boron increases vitamin D in the blood virtually no details
Reasons for low response by vitamin D level in the blood
low Boron is one of many reasons
How you might double your response to vitamin D

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Calcitriol category has 60 items along with related searches and the following chart