July 21st, 2010 
admin
How long does it take for drinks (not alcohol) to get into the blood stream? Does the type of drink change it?
I'm doing science fair this year and I am doing how energy drinks and coffee affect the heart rate compared to water. I need to find out how long after drinking the drink i need to take the heart rate. To do this I need to find out how long it takes to get into the blood stream and actually affect the heart rate.
I think that the rate of absorption of substances such as guarana, taurine, caffeine which are chemicals often found in energy drinks & coffee does vary from chemical to chemical. I'm no expert, though, so take this with a grain of salt. I know that, if you have a an empty stomach, substances dissolved in a liquid will be absorbed faster than if you had some food in there. Maybe, if you can't find conclusive studies by searching on google or yahoo, you might do a little research into doing your own little clinical trial, which I think is the point of a project to be displayed as an example for fellow students at a science fair. I would set it up so that there was a heart monitor on you ( I'm sure you could find one, they're fairly common medical/science equipment, ask your teacher maybe) and then sample certain drinks on an empty stomach (for the sake of your time spent waiting), record your heartrate at intervals of time, like maybe every 5 minutes or something, for a total of an hour or two. Try a different drink each day for a week and then you'll have results for a number of different drinks. You could make some sweet posters or a big colored chart to highlight your results.
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