From webmd.com....

Eat a variety of foods to avoid dietary deficiencies. Nutritional deficiencies of vitamins C, K, or B12 or folic acid can affect blood clotting.
Include a daily selection of:
Whole-grain and enriched breads, cereals, and grain products.
Vegetables.
Fruits.
Milk, cheese, and yogurt.
Meats, poultry, fish, eggs, dried beans and peas, and tofu.

Avoid dietary supplements that may increase bruising, particularly if you take a blood-thinning medication. Dietary supplements that may increase bruising include fish oil, vitamin E, garlic, ginger, and ginkgo biloba.