3. Vitamin K
A Dutch study involving more than 38,000 participants reported in the journal Diabetes Care that those who got the most vitamin K in their diets had a 20 percent lower risk of being diagnosed with Type 2 diabetes during the 10-year study period. The recommended daily intake for vitamin K in the United States is 120 mcg for men and 90 mcg for women. Vitamin K is found in two forms: vitamin K-1, which is found in green leafy vegetables and some vegetable oils, and vitamin K-2, which is found in meats, eggs, and cheese.