Double the benefits: It’s Why We Put Vitamin D In Our Signature Probiotic

By Kulani Mahikoa
Executive Vice President
Kirkman Group, Inc.

Vitamin D and probiotics have great synergy.  Both are powerful immune system supporters and in the gut, when taken together, they strengthen each other’s health benefits.   

Kirkman’s Pro-Bio Gold™ with Vitamin D-3, offers our proprietary and most popular probiotic blend (Pro-Bio Gold™) with 1000 IUs of vitamin D-3. 

Studies have shown that the vitamin D pathway is potentially an important modifier of the effects of intestinal flora (probiotics) in the digestive tract.  For example, in one study, mice that lacked vitamin D receptors, which prohibited their ability to absorb vitamin D, showed compromised intestinal health.  Researchers also found a decrease in homing of T-cells to the gut affecting normal, healthy bacterial flora[1].

Conversely, if the gut is compromised by unhealthy bacteria, this can interfere with vitamin D metabolism and absorption[2].

Pro-Bio Gold with Vitamin D-3 offers seven strains of beneficial bacteria for broad spectrum coverage.  These include Lactobacillus rhamnosus, Lactobacillus acidophilus, Bifidobacterium bifidum, Bifidobacterium lactis, Lactobacillus casein, Lactobacillus plantarum and Streptococcus thermophiles.

According to the Environmental Working Group, based on a 2014 analysis of data from the National Health and Nutrition Examination Survey (NHANES), more than half of the general population is vitamin D deficient regardless of age[3]. A serving also offers more than the Institute of Medicine’s recommended daily intake (RDI) of vitamin D-3, which is 400 IUs, but in-line with its cautionary upper intake levels of 1,000 IUs for babies and toddlers and 4000 IUs for anyone 9 years of age or older. 

[1] Savidge, T. (2009). Faculty of 1000 evaluation for Failure of T cell homing, reduced CD4/CD8alphaalpha intraepithelial lymphocytes, and inflammation in the gut of vitamin D receptor KO mice. F1000 – Post-publication peer review of the biomedical literature. doi:10.3410/f.1145846.602931

[2] Harvard Health Publishing. (2018, May 23). 9 things that can undermine your vitamin D level. Retrieved from

[3] Appendix B: Vitamin and Mineral Deficiencies in the U.S. (n.d.). Retrieved from

About Kulani Mahikoa

Kulani Mahikoa is Vice President and Marketing Director of Kirkman Group, Inc. She has had successful careers both as a journalist and as an entrepreneur.
This entry was posted in All, New Item. Bookmark the permalink.

Leave a Reply

Your email address will not be published. Required fields are marked *


You may use these HTML tags and attributes: <a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <strike> <strong>