Meat against osteoporosis-A A +A
Tuesday, October 1, 2013
IN THE meat, many we still have not met.
Witticism aside, I mentioned in another article a vitamin K that is not found in plants. Only vitamin K1 is. That form of vitamin K is called “menaquinone,” or vitamin K2. Vitamin K2 is the main storage form of vitamin K in animals.
The bacterial colonies found in the large intestine convert vitamin K1 to K2 by increasing the length of a molecular side chain. This subtype of K2 is a substance called “menatetrenone.”
However, certain bacteria such as Escherichia coli synthesize their own vitamin K2 without need of the raw material K1. Only gut bacteria produce all subtypes of K2 other than menatetrenone.
Unlike vitamin K1, Vitamin K2 presents many exciting functions beyond the classic vitamin K role in blood coagulation. The Sato study in 2005 found menatetrenone able to decrease fractures up to 87 percent at a dose of 45 mg daily, an impressive performance against osteoporosis.
This action occurred in a wide range of diseases such as prostate cancer, bone disuse due to stroke, anorexia nervosa, liver cirrhosis, postmenopausal osteoporosis, Alzheimer’s disease, Parkinson’s disease, and primary biliary cirrhosis. Animal studies showed it effective in preventing arterial calcification (initiated by warfarin treatment). That makes K2 important as a preventive vitamin against atherosclerosis.
The facts backing this K2 function are so tangible that the Ministry of Health in Japan approved since 1995 the use of menatetrenone at above-mentioned dose for the prevention and treatment of osteoporosis.
Another K2 form referred to as “MK-7” had prevented bone breakdown as a means of reducing bone fractures as well as cardiovascular disorders. Still no high dose known yet that resulted to toxic effects.
The food with highest content of menatetrenone is fermented soybeans, called in Japan as natto, with 1.1 grams per 100-gram portion (1/2 cup). It is also high in goose liver (369 micrograms). It can also be found at lower levels in fermented/aged cheese, chicken meat (and meat, liver and organs), egg yolk, and beef liver and organs.
These findings made me more impressed on the nutritional variety that soybeans provide. Try checking what other nutrients you can get from soybeans in addition to vitamin K2, and you will be impressed too. Just be careful with its components that have upper limits in intake.
Published in the Sun.Star Cebu newspaper on October 02, 2013.