Josh, I'll have to check out the book! Jody, just link back to your site. Hopefully you have analytics set up for your website, which it make it easier for you to track how many people clicked on that link from Facebook--helping you understand how important your Facebook business page is for your company.
The average (or more correctly the arithmetic mean) amount of vitamin k contained in 100g of grapefruit juice, based on the list below of 6 different items under the general description of grapefruit juice, is 0.02 ug of vitamin k.
Of all the fruit juices, grapefruit is the least sugary. Eating the fresh fruit is always preferable to juice, as digestion is a bit slower. Test your blood sugar before and 15 minutes after drinking 6-8 oz. of grapefruit juice on an empty stomach to see what the rise is. Usually, we caution to limit juice to 4 oz.