Caffeine Affects The Urine

About Caffeine Affects The Urine

Questions and Answers

Caffeine and kidney function? How do various volumes of caffeine (coffee) affect kidney function. How various amount of caffeine can affect urine production in the kidneys? I need to Design a lab experiment with which you can test how various volumes of caffeine (coffee) affect kidney function. (Unfortunately I am not this creative, can anyone help)

Lisa replied: "Caffeine effects the action of a hormone called - ADH or anti-diuretic hormone. ADH helps maintain the water balance in the body by triggering water re-absorption by the nephrons of the kidney. When ADH is blocked, water re-absorption is reduced and the kidneys lose water by an increased urine output. This is called diuresis. Your method could involve measuring the urine output of people who have had various amounts of caffeine. I have found a few experiments that could help you with techniques for urine analysis and include background into how the kidneys work I have linked them below..."

How does caffeine affect the body? Apart from coffee what other products can be used as an experiment to measure the amount of caffeine in a body system? And what can be measured apart from urine to test the effect of caffeine on humans? Its a suppose to be a simple experiment so I can't test blood.

h4mza_786 replied: "coke"

Gyro34 replied: "i drink diet coke all the time and it keeps me awake, if i go a day without it now, i will be tired through out the whole day."

Matthew Chin chin replied: "Coronary artery disease. Same as red bull."

R.N. replied: "Caffeine is able to create a sense of alertness usually an hour after ingesting it, but the effects will wear off 3 to 4 hours afterwards. It is used to fend off feelings of extreme drowsiness."

How is the ADH (antidiuretic hormone) affected by caffeine in the body? more questions below!? I'm a bit confused about this....so here is a hypothetical question. If two people drank the same volume of a liquid, one cola w/caffeine and the other distlled water. Who would have the higher level of ADH in the body. Whos urine would have the highest spesific gravity? How would the urinary flow rate be affected ( ml/min) with sample times every half hour?

Brian B replied: "The principle pharmacological effect of caffeine is as an inhibitor of adenosine, meaning it blocks adenosine receptors. Adenosine physiologically constricts the afferent renal artery, meaning it will DECREASE the renal flow rate. This decrease leads to less urine synthesis, stimulating renin release, increasing Angiotensin II, increasing Aldosterone, and thus more ADH. Therefore administering caffeine BLOCKS adenosine receptors, meaning the renal perfusion will be greater, and due to less renin release, less ADH, production of urine will increase. The soda drinker would have lower ADH and elevated urine output. His urine will be hypotonic to the person who drank water."

Can caffeine withdrawal affect your periods? I recently reduced my caffeine intake from 4/5 cups of tea/coffee per day plus the odd cola, down to caffeine free tea and coffee, with the odd cola. We are trying for a baby and thought this would help our "chances" as caffeine can cause miscarriages. I usually have a 30 day cycle, but this month i was due on the 20th and i still haven't "come on". I went to the doctor today as i have had about 10 days of cramping, pregnancy tests are all negative. She could not find any cause of my cramping and did extra urine tests to see if there were any other problems (all negative). It wasn't until i got home that i realised i have been "caffeine free" for about 2 weeks. Could this have caused my periods to be delayed as i know caffeine withdrawal can affect you in many ways. I had a few headaches but nothing else till now. Its really getting me down as i want to start charting again and my temperature is all over the place! She has told me to come back if my period doesn't arrive soon...

JAYNE T replied: "if you have just been to your doctor you should of asked her, they will know better"

snowball666 replied: "losing weight and putting on can change your periods plus changing what you eat and drink the cramps could be you due on period or preg as you can get little cramps i would leave another wk then test again I'm trying too so good luck xx"

Take two replied: "no it's all in the mind"

Does THC affect your brain/bladder relationship like alcohol and caffeine do? We all know that alcohol makes you have to pee and I have learned that it is because alcohol keeps that switch in your brain turned on to filter the bloodstream and create urine. Does THC do this as well? I'm wondering if it's the pot or if I have a bladder infection... :-( I don't need lecturing here, please. I am in school full time and am almost done with getting my bachelor's, so I thi *woops sorry, didn't mean to hit 'submit'!!

It's ME surprise replied: "if you stop smokin you might find out"

Erika replied: "you most likely have a bladder infection. i go to med school and have never heard of THC having any effect on a persons bladder"

Can a multivitamin/can of diet caffeine-free sprite/blood pressure medication affect a blood glucose test? I am currently studying abroad in Mexico. Over the past few days, I have had dry mouth, fatigue and occasional tingling sensations in my hands and feet. Until about 6 months ago I was morbidly obese but have lost about 140 pounds since undergoing LapBand surgery. I had my urine tested for sugar while I was at my highest weight and the test came back negative. Despite my weight loss, and the negative test result, I always worry about diabetes. Today I went to a (reliable) clinic and had my blood-glucose levels tested. I was not referred by a doctor, but I took it upon myself to fast. I had an orange last night at about 7:00 PM and then nothing except water, a can of diet sprite, a multivitamin and my blood pressure medication (Atenolol, 50mg) until my test around 11:30 AM. The result was a normal 78 mg/dL, so my fears have subsided for the time being. Just curious as to whether or not anything I consumed (or the fact that it was nearly 17 hours since I had eaten anything) could have impacted the results. Any answers are appreciated, though I would prefer a response from someone with a medical background. Thanks all.

Rednate replied: "Glucose in urine usually begins to be present when blood glucose levels are over about 180 mg/dL and might not even be seen then. That is based on the health/condition of your renal glomerular membrane that filters larger particles preventing them from appearing in your urine. Diet soda should not cause much of a rise in your blood glucose because they do not contain glucose. Instead they contain artificial sweeteners like aspartame. A multivitamin shouldn't change your glucose levels that much either although some vitamins are important in metabolic pathways that convert glucose into energy (ATP). I'm sorry but I don't know about your BP medication. Some of those adjust the amount to water you retain because if you retain less, your blood volume decreases, but I don't know if that is the case with Atenolol. If I had to guess, I would say that the BP med wouldn't greatly change your glucose either."

SugarBabie replied: "Waiting 17 hours for the test is not a good idea but it probably didn't have that much impact. At your next checkup, ask for an HbA1c test, which does not require fasting, and will not be affected by what you eat before the test. It gives your average blood glucose (sugar) over the last three months. Its a good idea to get this test done every year, especially for anyone with a history of weight problems, or over the age of 40, or with a history of diabetes in the family. It should be between 3.5 and 5.5% in a healthy, normal person. If its over 5.5%, the next step would be a Glucose Tolerance Test. For this test you fast 12 hours, don't even drink water, except just enough to swallow your blood pressure pill. Skip the rest, vitamin, Sprite, etc. as they can impact the GTT. If you are really concerned about diabetes, you should show your doctor the article on this page... if the article doesn't show, google "Atenlol and diabetes risk" and find the link for the Medscape article. It was second from the top when I did the search. Beta Blockers can increase the risk for diabetes quite substantially. You would probably be better off on an ACE inhibitor or an ARB. According to this report, beta blockers can increase the risk by about 50%... Whether its 30% or 50%, that's quite a risk. New-Onset Diabetes -- New Analysis of the Blood Pressure-Lowering Arm of ASCOT Linda Brookes, MSc Presenter: Ajay K Gupta, MD, MSc (International Centre for Circulatory Health NHLI, Imperial College, London, United Kingdom) The latest analysis of the results from the blood pressure lowering-arm of the Anglo-Scandinavian Cardiac Outcomes Trial (ASCOT-BPLA) has shown that a regimen based on a calcium channel blocker (CCB) (amlodipine), with or without addition of an angiotensin converting enzyme (ACE) inhibitor (perindopril), reduced the risk of new-onset diabetes by 34% in hypertensive patients, compared with a regimen based on a beta-blocker (atenolol) with or without a thiazide-type diuretic, bendroflumethiazide.[1] The ASCOT investigators believe that this finding has implications for the future role of beta-blockers and diuretics in the management of patients with hypertension and suggest that physicians adopt what they refer to as "the ASCOT strategy, an evidence-based strategy for combining CCBs and ACE inhibitors," to get their patients to currently recommended target blood pressures. "By so doing, they know that they will reduce the risk of new-onset diabetes by almost one third," the investigators say. On the basis of the results of this most recent analysis, the ASCOT investigators have also developed a new risk score model that can be used to identify those hypertensive patients at highest risk of new-onset diabetes. What is means is that Atenolol increases your risk by 34%. Switching to either ACE inhibitors or ARBs cuts that risk. I'd recommend that you discuss it with your doctor. He'll probably want to see the article."

Soda drinks + swimming? Hi, I was just wondering if a soda drinks (like Pepsi containing caffeine) would affect your performance during training. Say I drank one or two a few hours before a work out would that be bad? It's something I generally drink like most people. I heard caffeine puts valuable water in your urine. Would it make much difference?

French Fries replied: "I dont think so. But maybe you should change the soda to vitamin water, or if you want caffeine you can drink those fappiciono thingys from star buck. the ones in the glass bottle."

Hope replied: "caffeine is a diuretic and causes someone to become dehydrated. it really should never be taken before any work out. it also raises the heart rate which can cause heart attacks if you do to much cardio vascular exercise (i.e. swimming). and it causes you to loose energy quicker than usual. I'm a competitive swimmer and i have experimented with several different drinks before and during practices. The best thing to have is water or some sort of sport drink like gatorade. It will keep you hydrated and give you sustained energy to the muscles when you need it. there are also vitamin enhanced drinks that help repair muscles and give you energy. try not to drink more than you need too though this will cause you to feel sick. just drink until you are not thirsty. hope this helped"

Aaliyah president of Raganation replied: "I don't think it would make much difference. Especially a few hours before. Just make sure to drink plenty of water too."

kingofsports114 replied: "Look, i'm not gonna tell you to stop drinking them. I'd be a hypocrite if I did that. But it does affect your performance. It takes air away from you. You need to stick to water. The more water that you drink + the less soda you drink=the most potential for a great performance"

How should I redesign my experiment? For my biology class, we did a experiment to see how different beverages affected your urine output. One group had to drink water, another caffeine, and the third electrolytes. For the experiment, the person would wake up in the morning and go to the bathroom. Then they would drink 16 oz. of their specified beverage over the next hour. After one hour they would pee in a cup and mark how much they peed on the cup. Then they would wait a half hour. After that they would drink another eight oz. of their beverage. A half hour later they would pee in a cup and measure how much they peed. In class we measured how much each person peed both times. The results for each group were very different due to the fact that each person has a different urine output. So, for our lab right-up, we must redesign the experiment and make up for the fact that each person has a different regular urine output. How should I redesign the experiment? What would the independent and dependent variables, constants, and control be?

syriangonner replied: "how about doing the change in urine output. so first the person will drink 16oz of water over an hour and pee then record how much they peed. Then drink 16oz of their beverage and see the difference in output between the water and beverage."

michael_dilal replied: "figure out their individual average urine output (you will need alot of time) under just water and then claculate any increases/decreases with the other drinks"

sammom replied: "Make all the 3 groups drink same amount of water in 1 day. eg everyone drink 8 glasses of 6 oz water per day for 2 days ( Everyone's fluid intake should be same and only water should be consumed for these 2 days) and note the urine output. Then based on the average of 2 day output students should be divided into groups so that each group gets same Number of members with approximately same amount of average urine output. then 1 group acting as control consume water and other groups should consume differrent beverages example Tea , Coffee Juice etc the way you mentioned in your question. Total quantity of Fluid intake per day should remain same for all groups. example : Group 1: 8 glass of water, 6 oz each glass. Group 2: 2 glass of tea + 6 glass of water( 6 oz each) Group 3: 2 glass of juice+ 6 glass of water etc Best of luck!"

polt3r replied: "The experiment strictly speaking can't be performed well, as it depends on what exercise you do, how fast your rate of metabolism is, what you ate the day before, etc. I would keep same results, and pin point the sources of error if I were you."

oikos replied: "Constant: urinating before starting Independent Variable: type of beverage Dependent Variable: Amount of urine Control: drinking water For redesign, you might rotate the groups on successive days, so that each person has a chance to test each beverage."

How should I redesign the experiment? For my biology class, we did a experiment to see how different beverages affected your urine output. One group had to drink water, another caffeine, and the third electrolytes. For the experiment, the person would wake up in the morning and go to the bathroom. Then they would drink 16 oz. of their specified beverage over the next hour. After one hour they would pee in a cup and mark how much they peed on the cup. Then they would wait a half hour. After that they would drink another eight oz. of their beverage. A half hour later they would pee in a cup and measure how much they peed. In class we measured how much each person peed both times. The results for each group were very different due to the fact that each person has a different urine output. So, for our lab right-up, we must redesign the experiment and make up for the fact that each person has a different regular urine output. How should I redesign the experiment?

bdwolfhound replied: "Collect baseline data from each participant in the experiment for say, one week using plain water as the intake fluid. Thus, you would have two data points per person over a 7-day period. The repeat this, with each participant consuming the same volume of the test beverage at the same time each day. Comparison of test vs water data should enable you to form a good impression of the effect of the test beverage independent of volume intake. You might have enough information to see if any trend developed or if there were individual differences in fluid processing, such as for instance influences of food consumed."

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