10 Impartial Caffeine Research Studies For Fact-Based Decision Making


Below are links to some of the major research that drove our decision-making. These are independent studies that provide insights into caffeine and caffeine withdrawal. Here, you see the science supporting general vitamin effectiveness that guided our fact-based decision making. 

Still, if this is not enough, please contact us if you want to “geek out” and dig into more of these as this is not inclusive of all the studies we reviewed.



Zinc effectively reduced cold duration in many studies.

Further, it supports immune system health as well as effective dopamine (“feel-good” hormone) production. 



It’s not your imagination. Your morning coffee does not have the kick it used to.

Consumption of high levels of caffeine will decrease it’s effectiveness over time.

L-Theanine Research


L-Theanine replicates the calming effects found in a cup of tea.

Research finds it also helps counteract the sleep disturbances that often accompany caffeine use. But most importantly, research has confirmed that L-Theanine, when combined with caffeine, is more effective than alone.



The FDA has outlined how much is too much caffeine. With this in mind, they outline the factors that can lead to addiction and even death.

Similar to the FDA report, the Netherlands Nutrition Centre has also outlined guidlines that serve as the guard rails for safe and sane consuption in Europe.

Vitamin C Research


Research into both immune health and mood indicate effectiveness of Vitamin C.

A Historical Perspective


Research by University of Rome. They detail the historical and current impacts of cafeine use. The study also details incidents of accidental overdose.

This study was especially interesting in that it provides a historical perspective that modern society did not invent caffeine addiction to try to get more done.

FDA Facts


US Food and Drug Administration article on how much caffeine is too much.