People with thick blood, or high blood viscosity, should eat foods that are low in fat and cholesterol, such as fruits, vegetables and whole-grains, according to Everyday Health. Some tips for replacing high-fat foods are to buy nonfat or low-fat dairy products and to restrict egg yolks to no more than four each week.
Removing fat from meat and using healthier cooking methods can also help reduce dietary fat and cholesterol, suggests the UCSF Medical Center. Poaching, roasting and boiling are all preferable to frying, for example.
Sometimes even seemingly healthy foods can be problematic for people suffering with high blood thickness. These include nuts and organ meats, such as liver, which should be eaten only moderately.