As mentioned above, vitamin K2 plays a central role in the metabolism of calcium, the main mineral found in your bones and teeth.

Vitamin K2 activates the calcium-binding actions of two proteins — matrix GLA protein and osteocalcin, which help to build and maintain bones
Interestingly, there is also substantial evidence from controlled studies that K2 may provide major benefits for bone health.

When thousands of letters from Kufans, inviting Imam Hussain (AS) to come to Kufa, to support him, and pledge allegiance to him, Imam Hussain sent his cousin Muslim b. ‘Aqeel (RH)to report him the news of Kufans, to check their intentions, and to take the pledges of allegiance and their promises of obedience to imam Hussain (AS). He (AS) wrote them a letter and sent it with him. The most important thing about this letter is the praising of Imam Hussain (AS) to him.

Long-term controlled trials on vitamin K2 and heart disease are needed.

Still, there is a highly believable biological mechanism for its effectiveness and strong positive correlations with heart health in observational studies.
May help improve bone health and lower your risk of osteoporosis
Osteoporosis — which translates to the phrase “porous bones” — is a common problem in Western countries.
It is seen especially among older women and strongly raises the risk…
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The Eiffel Tower can be 15 cm taller during the summer, due to thermal expansion meaning the iron heats up, the particles gain kinetic energy and take up more space.

Another study in 16,057 women found that participants with the highest intake of vitamin K2 had a much lower risk of heart disease — for every 10 mcg of K2 they consumed per day, heart disease risk was reduced by 9%
On the other hand, vitamin K1 had no influence in either of those studies.

However, keep in mind that the studies were observational studies, which cannot prove cause and effect.

The heart of a shrimp is located in its head. They also have an open circulatory system, which means they have no arteries and their organs float directly in blood.

Hearing is our fastest sense. The human body can hear faster than it can see, taste or smell. Once a sound wave reaches your ear, your brain can recognize it in just 0.05 seconds. That's 10X faster than the blink of an eye.

Calcium buildup in the arteries around your heart is a huge risk factor for heart disease
Anything that can reduce this calcium buildup may help prevent heart disease. Vitamin K is believed to help by preventing calcium from being deposited in your arteries
In one study spanning 7–10 years, people with the highest intake of vitamin K2 were 52% less likely to develop artery calcification and had a 57% lower risk of dying from heart disease

The peregrine falcon is best known for its diving speed during flight—which can reach more than 300 km (186 miles) per hour—making it not only the world's fastest bird but also the world's fastest animal.

In controlled studies in people, researchers have also observed that vitamin K2 supplements generally improve bone and heart health, while vitamin K1 has no significant benefits (4Trusted Source).

However, more human studies are needed before the functional differences between vitamins K1 and K2 can be fully understood.

How do vitamins K1 and K2 work?
Vitamin K activates proteins that play a role in blood clotting, calcium metabolism, and heart health.
One of its most important functions is to regulate calcium deposition. In other words, it promotes the calcification of bones and prevents the calcification of blood vessels and kidneys.
Some scientists have suggested that the roles of vitamins K1 and K2 are quite different, and many feel that they should be classified as separate nutrients…
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Carbon monoxide can kill a person in less than 15 minutes.