This post (“The vitamin deficiency that’s written all over your face”) by Sarah Pope at Healthy Home Economist is very good. It takes various pieces of data and puts them together to suggest that people who don’t get enough Vitamin K2 will get facial wrinkles sooner. The most interesting data is the difference between women in Shanghai, Bangkok and Tokyo — the Tokyo women had the fewest wrinkles. They eat the most natto, of course, and natto is notoriously high in Vitamin K2. Pope should have added that Tokyo women probably also eat a lot more of other fermented foods than Shanghai and Bangkok women — for example, more pickles and miso.
Another example of the same sort of reasoning:
Further research which bolsters the notion that getting plenty of K2 in the diet makes for smoother facial features is found in the research of Korean scientists and was published in the journal Nephrology in 2008. The rate at which the kidneys are able to filter the blood is an important measure of overall kidney function. Researchers found that reduced renal filtration rate was associated with increased facial wrinkling. What does decreased kidney filtration rate predict? You guessed it – Vitamin K2 deficiency, according to American research published the year after the Korean study.
I wonder what other nutritional deficiencies poor kidney function is associated with. These associations are far from convincing but it is a new (to me) and testable idea. And Vitamin K2 is quite safe.