1. Vitamin K is the name given to a particular group of vitamins. They are found mainly in leafy green vegetables such as spinach, broccoli and cabbage. Vitamin K1 has the chemical name phylloquinone. It structure is shown below.2. Find out what you can about vitamin B12. You should state a good source of vitamin B12, what essential mineral element it contains, what its function in the body is and what disease is caused...