Top
10
Doctor insights on: How Long Does Caffeine Stay In Your System

Share
1

1
How long does caffeine stay in your system?

How long does caffeine stay in your system?

Depends: Depends on size and age of the person, and what else is in the system, but the half life is 3 to 12 hours. ...Read more

See 1 more doctor answer
2

2
How long does caffeine stay in your system?

How long does caffeine stay in your system?

Variable: In general, it is short-acting, with a half-life of about 3 hours, but there may be genetic differences as well as drug/drug and drug/food interactions. Some people are very sensitive to some effects of caffeine, and consuming some in the morning may even interfere with sleep. Drugs like caffeine alter the receptor/neurotransmitter environment, and those effects may last longer than the drug. ...Read more

3

3
How long does caffeine stay in your system?

A long time...: It stays in your body longer than you might think. Half life of caffeine can be anywhere from three to seven hours which means it can stay in your system 5 times that long depending on your metabolism. ...Read more

4

4
How long does caffeine stay in your system? Drinking a cup of tea (61 mg caffeine) at 5PM -- will I be ok going to bed at 10PM.

How long does caffeine stay in your system?  Drinking a cup of tea (61 mg caffeine) at 5PM -- will I be ok going to bed at 10PM.

Yes: Different people have different sensitivity to caffeine. You may try different doses and times of caffeine intake to ensure that it does not cause jitteriness or interfere with your sleep. For good health - Have a diet rich in fresh vegetables, fruits, whole grains, milk and milk products, nuts, beans, legumes, lentils and small amounts of lean meats. Avoid saturated fats. Drink enough water daily, so that your urine is mostly colorless. Exercise at least 150 minutes/week and increase the intensity of exercise gradually. Do not use tobacco, alcohol, weed or street drugs in any form. Practice safe sex. ...Read more

See 1 more doctor answer
5

5
How long does caffeine from coffee stay in your system? If I drink a cup at 4:00pm, will it be out of my system by midnight?

How long does caffeine from coffee stay in your system?  If I drink a cup at 4:00pm, will it be out of my system by midnight?

Generally yes: However some people are very sensitive to caffeine and they feel the stimulation from it for even longer. Some people can't have coffee after noon for example. ...Read more

See 1 more doctor answer
6

6
How long does caffeine from a can of soda stay in your system?

How long does caffeine from a can of soda stay in your system?

Caffeine: A caffeine peak occurs approximately 2 hours after ingestion. The biological half-life of caffeine is about 5 hours. This means that the caffeine should be cleared in approximately 25 hours. ...Read more

7

7
How long does it take caffeine to get out of your system?

How long does it take caffeine to get out of your system?

Variable: Usual half life of caffeine is 3-7 hours. It takes about 10 half lives for the chemical to become undetectable. Use of tobacco, birth control pills, pregnancy and some medications prolong the clearance time. ...Read more

8

8
How long before an average cup of coffee enters your system..What would the caffeines peak time and half life be?

How long before an average cup of coffee enters your system..What would the caffeines peak time and half life be?

By average 5 hr half: By average the half life of caffeine itself is 5 hours. It peaks 0.5-2 hours. And it will take 3-4 half lives before it clears out of your body assuming this is a young healthy adult. ...Read more

See 1 more doctor answer
9

9
How long does caffeine stays in your system? Cause I have stress test tomor and I ate a piece of chocolate cake at 4 pm

How long does caffeine stays in your system? Cause I have stress test tomor and I ate a piece of chocolate cake at 4 pm

Caffeine . : Caffeine stays in your system about 10 -12 hours . Don't worry though chocolate does not have caffeine in it as far as I know snd it should not affect your stress test results significantly ...Read more

See 2 more doctor answers