Yes, you can work out before donating blood. You should make sure you are adequately hydrated before donating, though.
You only need to fast before blood work if you are having a fasting blood glucose blood test. Not each blood drawing will require you to fast. If you are required to fast, you may still drink water before your blood work.
yes
If it's blood work to test for drugs in your system, then I highly suggest against it. It depends on your metabolism, but it could show up in your blood quite quickly. However, if you're getting other routine blood work, such as a blood sugar test, or a CBC, then you'll be fine, and there is nothing to worry about.
No, I do not believe a blood test is required before a marriage in Italy.
No, you do not have to fast before that test. You can have the blood draw done at any time.
If you are having blood work done and are told to fast, then you can drink nothing but water. If it is non-fasting, then you can have coffee, but be sure to tell the person doing the blood work.
You can eat sushi before a blood test. You may want to discuss with your doctor about your blood test to see if this is a good idea, though.
No. It makes your blood pressure go up and your cholesterol can increase.
Yes, you are not to eat or drink before a cholesterol blood test.
Before
No. The test is a fasting blood test so you don't eat or drink anything before the test from midnight the night before until the test is done. Best to do the test first thing in the morning.