MK7 versus MK4 is a common topic online and continually you will see that MK7 is preferred for various reasons including better absorption. That being said, the MK4 still appears on numerous sites referencing its helpfulness in improving bone density and reducing risk of fractures. I will keep reading on this topic so I can make a sound decision moving forward. Regardless, it met my minimum criteria as I am trying to improve my gut "microbiota" due to being back on PPI medications for gerd. In a nutshell, PPI meds can affect how food and nutrients are absorbed and my guess is that may be happening with me. I eat a very well balance diet and have excellent dental hygiene yet I am having issues I cannot explain. I am starting to take numerous vitamins and minerals to address this due to having these current gum issues. Hopefully these changes will make a difference. It appears this product is free of "most" undesirable fillers/additives. Silicon dioxide is one I could probably do without but it's not a deal breaker. I like vegetarian capsules versus pills and these are filled with a brownish powder. They go down easily, no gagging and I haven't had any side effects