Caffeine and It's Effect


Have you ever wondered the effects of caffeine? Have you experiences the effects of caffeine? What is caffeine, a stimulant or depressant? Why does it stop affecting our system after a few hours? How much leaves and stays in the body each hour?

Caffeine affects our Central Nervous System (CNS), muscles, hearts and blood. Caffeine is most commonly used as a stimuli, to raise mental awareness. But, it is also used in herbal, pain-killer medicines, low blood-pressure and weight loss. Thus, caffeine is a stimuli, not a depressant. Caffeine affects restlessness, nervousness, irregular sleeping patterns (excessive) and stomach irritation.

Caffeine also makes its’ exit out of the body even hour. Research from the National Science Foundation reports, in an average person, 13% of the caffeine consumed is decreased every hour. This means, 87% still remains in the body. Every drink that consists of caffeine, hourly it will decrease by 13%.

To put this into work, I tracked the amount of my caffeine consumption over a course of 48 hours. The time began from 6:00 AM on Sunday, May 29 to 6:00 AM on Tuesday, May 31. Within these two days, drink items that included caffeine were; black tea, masala chai, Pepsi-Cola and iced coffee.


Over the course of 48 hours, I consumed caffeine seven times. Each time caffeine was consumed, a different equation was created:

  • The first equation (in red) was y=67(0.87)^x-0.5 of masala chai, drank after 30 minutes of 6 o’clock in the morning. It consisted of 67 milligrams of caffeine. However, the 67 in the equation derives from the amount of caffeine at 6:30 AM, saying we drank and finished the masala chai at 6:30 AM.

  • The second equation (in purple) was y=235.38(0.87)^x-4.5 of Dunkin Donuts small iced coffee. It was consumed at 10:30 in the morning, 4.5 hours after 6:00 AM. The coffee itself instilled 197 milligrams of caffeine. But, even after 4.5 hours the previous caffeine consumption was still in my body, 38.38 milligrams. So, 197 and 38.38 were added to get the total caffeine present in my body at 10:30 AM.

  • The third equation (in black) was y=149.07(0.87)^x-10.5 of black tea with 47 milligrams of caffeine. It was consumed 10.5 hours later from 6 in the morning. The number 149.07 comes from the previous amount of caffeine present in body at that time, 102.07 mg, then an addition of 47.07 milligrams.

  • The fourth equation (in blue) was y=131.64(0.87)^x-16.5 of Pepsi consumed. It was consumed after 16.5 hours counting from the 6:00 in the morning. The number 131.64 comes from the amount of caffeine in the Pepsi 38.9 mg and the previous amounts at that time (just before consumption of Pepsi).

  • The fifth equation (in red) was y=103.03(0.87)^x-25.75 of masala chai consumed on day two. The green shade represents from what to what time I was sleeping. Even during sleep the caffeine was releasing out of the body. So, 103.03 comes from the 67 mg in the masala chai, in addition to the previous amounts of caffeine within the body.

  • The last, sixth equation (in red) y=91.72(0.87)^x-35 also represents masala chai being consumed after 35 hours (from 6:00 AM, previous day). As in the previous equations, 91.72 mg is of two “ingredients.” The already caffeine in the body, plus the additional caffeine being consumed from the drink, in this case 67 mg were added to the previous amounts of caffeine, 24.72 mg.

Screenshot 2016-06-05 at 10.25.05 PM
Screenshot 2016-06-05 at 10.25.05 PM

To break down the graph we have key features. They are features that best describe the graph, for an easier understanding. In terms of the graph, the red line represents 32 mg of coffee, the amount in the body that it is no longer in effect. The horizontal axis, x-axis represents the time in hours, while the vertical line, y-axis represents the amount present in my body.


Caffeine may seem pleasant for a while, at least until not abused. Within adults, one should consume no more than 350 mg to remain healthy. However, even adolescents take caffeine through chocolate bars or coffee it self. Adolescents should take no more than 90 mg of caffeine per day. A high intake can cause problems such as in sleeping, breathing and blood flow. Caffeine if consumed higher than written should be controlled the next day. Limits should be set up. And, drinking caffeinated drinks early in the morning, allowing the body to process if the whole day will be beneficial. However, after the caffeine levels in your body drop to 32 mg, you can’t feel its’ affects. Drinking caffeine is no problem as long as it is not overdosed or abused.