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Atopic Dermatitis and Vitamin D

Published in Veterinary Record (1) is an interventional study on the effects of vitamin D supplementation on dogs with atopic dermatitis.  Conclusion: Oral vitamin D decreased both pruritus and also acute and chronic skin lesions in dogs with AD.  The improvement in the dogs with pruritus was significantly correlated with an increase in serum 25-OH-D3 […] Read more »

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Food Quality is Vital for reaching Vitamin D Sufficiency

The term vitamin D has become a catch-all for three different forms of vitamin D: D3, 25(OH)D3, and 1,25(OH)2D3 (calcitriol), as well as the 24-hydroxylated components.  The routinely measured and primary store of vitamin D is 25(OH)D3. Vitamin D Metabolism In a dog or cats’ diet, the primary available format is both D3 and 25(OH)D3.  While commercial food […] Read more »

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Vitamin D Intoxication

Over the years, and just recently, there have been food recalls concerning excess vitamin D in pet food and reported ‘vitamin D intoxication’. Pets eating these foods and exhibiting signs of hypercalcemia are assumed to have vitamin D intoxication. Background: Vitamin D exists as three different forms: Vitamin D3  25-hydroxy-vitaminD (25(OH)D)  1,25-dihydroxy-vitaminD (calcitriol).  Both D3 and 25(OH)D are […] Read more »

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Let’s Test Vitamin D

VDI Laboratory – Leader in Vitamin D Testing Vitamin D shouldn’t be scary. Although the internet is abound with recalls and scary articles about toxicity, the bigger issue in a majority of cats and dogs is the pandemic of Vitamin D insufficiency. Vitamin D is as important for your pet as it is for you. […] Read more »

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Vitamin D Insufficiency – A Pandemic in American Pets

Vitamin D insufficiency is a major problem in cats and dogs in the United States.  According to a 2015 study out of Tufts University1, 75% of dogs are vitamin D insufficient.  We wanted to look at what that meant for real world pets. The real problem in real world patients VDI analyzed its database of […] Read more »

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Vitamin D Status Affects Heart Disease

Research in both human and veterinary medicine shows vitamin D to be an independent risk factor for adverse cardiac events.  Two recent studies looked at the association between Vitamin D levels and Chronic Valvular Heart Disease (CVHD). Kraus, et. al., found that in dogs, low stores of 25(OH)D were associated with CVHD, as well as a 2.6 times greater hazard of having a […] Read more »

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Vitamin D Report — High End Sufficiency

VDI Laboratory provides patient specific dosing guidelines on all Vitamin D reports for cats and dogs. Now, all Vitamin D reports come with a second dosing guideline for reaching the high end of the sufficient range.  High End Sufficiency Sometimes we get asked- can we target higher in the sufficient zone (100-150ng/mL)?  The answer of course […] Read more »

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All major brands of dog food provide insufficient vitamin D

In a major study from Tufts University , 40 different brands of dog food were evaluated for the amount of vitamin D absorbed and converted to 25-hydroxyvitamin D (25vitD), the primary store and precursor to the active hormone, calicitriol. In a group of 320 dogs, 25vitD concentrations ranged from 9.5 to 249.2 ng/mL.  However, the median 25vitD concentration was […] Read more »