As a professor at Temple University and an expert on caffeine, I have often faced questions from my students about current issues relating to caffeine. One matter that has arisen lately is a concern over so-called “energy drinks,” that is, soft drinks that are usually carbonated and that contain more caffeine than traditional caffeinated sodas.  Typically, my students ask if they should be worried about the safety of the caffeine content of these drinks.  In light of all the worry and apprehension that irresponsible and poorly informed articles and web postings have created about the purported dangers of energy drinks, I thought that this would be a good time to repeat my answers for a wider audience. 
Stuff and Nonsense about Caffeine and Energy Drinks
Publicity hungry politicians, attorneys filing lawsuits over figmentary torts, and self-appointed caffeine “authorities” have asserted that the caffeine in energy drinks has caused heart problems, strokes, and even resulted in over a dozen fatalities.  You may be happy to learn that these charges are absolutely groundless:

Caffeine’s Unequalled Record of Safety 
No substance has ever been field tested the way caffeine has been. There are almost 7 billion people in the world.  Over 90% of them consume significant amounts of caffeine on a regular basis.  In fact, caffeine has an unequalled record of safety and value proven through hundreds of years of use by what has become nearly the entire human race.  In addition, the evidence of double-blind and longitudinal peer-reviewed research studies overwhelmingly proves that caffeine delivers dozens of health and lifestyle benefits.  These studies also demonstrate that caffeine in moderation is extremely safe for almost all healthy adults.  These facts are authenticated by an FDA statement that caffeine is characterized by its long history of safe use.
Moderation is “Built-in” to Caffeine!
People respond to caffeine in different ways, and some people are much more sensitive to caffeine than others.  In order to use caffeine correctly, you must determine what caffeine actually does to you and discover the amount that is right for you.  

However, interestingly enough, caffeine has an automatic “breaking mechanism” or self-limiting mechanism that discourages people from consuming more than the optimal, safe amount.  This mechanism is known as the “Yerkes-Dodson effect.”  It basically describes the fact that a little caffeine can help you feel and perform better, more can help you feel and perform still better, but increasing the amount beyond this point actually begins to reverse the benefits that caffeine delivers!  For example, a runner can run faster and longer if he consumes 200 mg. of caffeine.  He can probably run still faster and longer if he consumes 300 mg.  However, if he consumes considerably more caffeine, his running performance will begin to suffer!  This means that, unlike other stimulants, caffeine has a natural limitation or “ceiling” beyond which it actually reduces performance.  Therefore, neither athletes nor anyone else is ever tempted to ramp up the dose of caffeine beyond safe levels, because there simply is no advantage in doing so.  (See our post on the Yerkes-Dobson effect.)

No Worries over Energy Drinks!
As the FDA has recently stated, there is no reason to be troubled about the level of caffeine consumption in this country.  It is rather sad that groundless condemnations of caffeine continue to circulate widely, while the truth, that caffeine is not only safe but is beneficial to health and happiness, receives far less recognition.  As I hope this article has made clear and the FDA has maintained, we should all relax.  There is simply no reason to be worried about the caffeine in energy drinks!


One Response

  1. Mr. Weinberg,
    As an otr truckdriver I use both Jet Alert and (lately) Monster energy drinks. I use a different version than the ones you are showing in the images though due to my problem with GERD and my desire to lose a few pounds. I use the softgel Jet Alert which is much easier on my GERD (acid reflux) and I use the Rehab version of Monster due to it having only 10 calories, which also eliminates a sugar crash.
    The only problem I have with the energy drinks (which would be a problem with any of them, not a problem just with Monster), is that with my acid reflux being stimulated any time there is caffeine physically present in my stomach (at least in a large amount), sipping on a Monster from time to time keeps the caffeine present continuously. I switched to the softgel version of caffeine years ago to avoid this very problem since a softgel reduces the acid production window dramatically by allowing the caffeine to absorb rapidly through the stomach lining and be gone from the scene. Once the caffeine is in the bloodstream it is rapidly diffused throughout the body and it’s effect on acid production (at least for me) from the bloodstream side is minimal. However drinking energy drinks as I have started doing in the past year or so, does ramp the acid production back up again unfortunately.
    I use Monster (the 10 calorie Rehab version) to partially counter the gradual drop off in alertness as caffeine is metabolised, a sort of impromptu time-release effect. But what I would really like is for some company to develop a real time-released version of a softgel (which might be difficult, but I don’t believe impossible, using something like microbeads containing additional caffeine) with an enteric coating. The enteric coating would get it beyond the stomach before dissolving, eliminating the direct, primary acid stimulation in the stomach. A softgel design would make the first release of an initial 200mg of caffeine in the upper intestine be absorbed quickly, while another 200mg or so of time-released caffeine in something like microbeads, dissolving over time would (or should) mitigate the drop-off of caffeine as the day goes by and also keep metabolism up and the munchies at bay, which would help weight loss as well.
    The caffeine could be released in timed stages throughout the day to maintain a constant level in the blood, or even an increasing amount if the studies indicated that was what was necessary for alertness.
    Including a hefty dose of Rhodiola Rosea extract (an adaptogen like ginseng) in the time-released formula would magnify the effectiveness of the caffeine and contribute to an overall feeling of well-being.
    Folks, here is a link to another good post on this site. In the comments of the Neurotransmitters page I wrote a bit more on the subject of caffeine and acid reflux. https://worldofcaffeine.com/caffeine-and-neurotransmitters/

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