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Doctor insights on: Why Fast Before Blood Work

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Can you fast too long before a fasting blood test?

Can you fast too long before a fasting blood test?

In a way, yes: If you fast for longer than a day or so, it will alter some blood chemistries. Fasting tests are usually set for an overnight fast, or a 12 hour fast. Prolonged fasting is starvation and it affects the body metabolism. ...Read more

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Running with low blood pressure)) do I need to be doing longer/shorter warm up before sessions? And why

Running with low blood pressure)) do I need to be doing longer/shorter warm up before sessions? And why

No special precautio: Normal blood pressure has a wide range of readings among different individuals. A lower range of pressure is of no consequence as long as you do not feel dizzy or light headed when you stand up. In this case you can exercise and not worry about the duration of the warm ups. ...Read more

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Do i need to fast when i get blood work done alkaline phosphatase isoenzymes ; cmp?

Do i need to fast when i get blood work done alkaline phosphatase  isoenzymes ; cmp?

Yes: Food intake will raise serum alkaline phosphatase as it is one of the enzymes in the intestine. Cmp has other components that require that you be fasting. Please fast for 9-12 hours before the test. ...Read more

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How long do I need to fast for getting blood work done?

How long do I need to fast for getting blood work done?

8 hours is common.: Most clinics will ask you to have nothing to eat after midnight, and have the blood draw first thing in the morning- so it could be 8-12 hours. You may drink non-calorie clear liquids, i.e., water, tea, coffee. Don't put milk or sugar in your beverage, or you'll have to repeat the test! ...Read more

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Why does my blood sugar spike after morning workouts?

Why does my blood sugar spike after morning workouts?

Hormones: There are stress hormones and adrenalines that come out when you exercise. They counteract the effect of Insulin making it less effective, thus your blood sugar goes up. This is a natural response. Eventually, the blood sugar should come down as the Insulin become more sensitive again. ...Read more

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Why did i find some blood clots when i pee 2-3 hours after i sprint run while doing treadmill. That was no blood clots if i didn't do the running.

Why did i find some blood clots when i pee 2-3 hours after i sprint run while doing treadmill. That was no blood clots if i didn't do the running.

Hematuria: Strenuous exercise can cause hematuria, or blood in the urine. While it can occur with any type of activity, runners are particularly prone to this problem. Women that exercise heavily may also note erratic menstrual patterns or unusual vaginal bleeding, virtually always in concert with some other underlying condition in which vaginal bleeding is not normally a feature. ...Read more

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Why does my hr slow down so quickly after exercise?

Why does my hr slow down so quickly after exercise?

That's a good thing!: A heart that is used to vigorous regular exercise is supposed to slow down quickly after exercise. In fact, having your heart rate going too fast for too long after exercise is sometimes a sign of silent heart disease, even if the person is a well-trained athlete with a slow resting heart rate. Now if you don't exercise regularly & your pulse is under 60bpm, talk to your doctor. That's a problem. ...Read more

Dr. Jahan Zeb Dr. Zeb
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I heard that you are supposed to eat protein 30 minutes after you work out also heart you can eat protein before during and after you work out?

Dr. Jahan Zeb Dr. Zeb
3 doctors agreed:
I heard that  you are supposed to eat protein 30 minutes after you work out also heart you can eat protein before during and after you work out?

Heart energy sources: They heart can use many sources for its energy needs such as glucose and fatty acids depending on the metabolic state your body is in. Protein is not utilized by the heart for energy. ...Read more

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How soon after ovulation does hCG show up in blood work..Im 8 DPO wanted do bloodwork?

How soon after ovulation does hCG show up in blood work..Im 8 DPO wanted do bloodwork?

Back to Health Class: Ovulation does not produce HCG hormone. A fertilized egg that has traveled into the uterus and is implanted on the wall of the uterus and is growing big enough to leak some of this hormone into the mother's blood stream. It is often thought that one should wait two weeks after ovulation for this testing. ...Read more

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Why does my blood pressure and heart rate go up when i haven't eaten or eaten enough?

Why does my blood pressure and heart rate go up when i haven't eaten or eaten enough?

Less likely: Minor variations in blood pressure are very common and usually physiologic. When someone eats less, it would be more likely to have lower blood pressure due to less salt intake as well as some dehydration. ...Read more

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Why do I feel bad after a hypoglycemic (low blood glucose) episode?

Why do I feel bad after a hypoglycemic (low blood glucose) episode?

Decrease blood sugar: Decrease blood sugar can affect brain cell in the same way as lack of oxygen. It can cause stroke or seizure type symtoms. If hypoglycemia is reversible quickly then it may not cause any permenent damage to brain cells. ...Read more

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What can I do to lower blood sugar immediately? And why do people feel weak and tired when theyre sugar goes high?

What can I do to lower blood sugar immediately? And why do people feel weak and tired when theyre sugar goes high?

Talk to your doctor: Get a plan for correcting high sugars. One easy thing to do is drinking water. Not soda, juice, or anything else - just water. Anytime your sugar is over 200, you become dehydrated, and just drinking water can lower your blood sugar quite a bit. Light exercise such as walking at an easy pace may help the muscles pull more sugar out of the blood. Avoid eating carbs until your sugar comes down. ...Read more

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Is it necessary for me to fast before blood work?

Is it necessary for me to fast before blood work?

Depends: It depends on what is being tested. Usually fasting is recommended for lipid panels & diabetes testing. Your lab or your doctor should be able to tell you prior to the test. ...Read more