Researchers at Tufts University were investigating the effect that Vitamin K supplements have on the bone mineral density and vascular calcification of a group of 355 non-diabetic men and women aged 60 to 80.
However, during the course of their 3 year study, they found that the participants who received the Vitamin K supplement had a noticeable improvement in their insulin resistance.
And as you already know, insulin resistance is one of the major factors driving America’s obesity epidemic.
Among the participants given vitamin K, both men and women took daily multivitamins containing 500 micrograms of vitamin K, five times the Adequate Intake (AI) recommended by the Institute of Medicine’s Food and Nutrition Board, with instructions to maintain normal diets without any additional supplementation.
They also received a calcium and vitamin D supplement.
Men and women in the control group received no vitamin K supplementation but did receive the multivitamin and the calcium and vitamin D supplement.
For the present study, insulin resistance was assessed by the homeostasis model (HOMA-IR).
Additionally, participants’ blood glucose and blood insulin levels were measured following a minimum 10-hour fast.
In addition to improved insulin resistance, the supplemented men had lower blood insulin levels compared to the un-supplemented men at the conclusion of the study.
The researchers concluded that Vitamin K supplementation for 36 months may reduce progression of insulin resistance in older men.
And why would Vitamin K have an effect on insulin resistance?
The researchers theorized that vitamin K may improve insulin sensitivity through suppression of inflammation.
Aaahhh, our old friend inflammation.
During the study, the participants took daily multivitamins containing 500 micrograms of vitamin K, five times the Adequate Intake (AI) recommended by the Institute of Medicine’s Food and Nutrition Board, with instructions to maintain normal diets without any additional supplementation.
Checking my multi, I see that I am taking 80 mcg of vitamin K.
So, where can I get more Vitamin K?
According to the USDA:
And if you want more info on Vitamin K:
Check out the Linus Pauling Institute page on Vitamin K
or watch this video: