What Is Thrombotic Thrombocytopenic Purpura? Thrombotic thrombocytopenic purpura (TTP) is a rare blood disorder. In TTP, blood clots form in small blood vessels throughout the body. The clots can limit or block the flow of oxygen-rich blood to the body's organs, such as the brain, kidneys, and heart. As a result, serious health problems can develop.
If you are taking iron, the following foods should be avoided, or only taken in very small amounts, for at least 1 hour before or 2 hours after you take iron: 1  Cheese and yogurt. 2  Eggs. 3  Milk. Spinach.  Tea or 1  coffee. Whole-grain breads and cereals and  bran.
Iron blood test. Iron blood tests are usually taken in the morning before you eat anything. You should also avoid taking iron pills or tablets for 24 hours before your test. Your body absorbs iron very quickly from food or pills, so this can raise your iron levels and affect the test results.ou can eat and drink as normal before some blood tests. In other cases, you will be instructed not to eat or drink (other than water) before your test. This is known as a fasting blood test. You may also be told not to drink alcohol or not to smoke before your test.