Drinking an entire gallon that milk in one sit is a challenge often undertaken, infrequently accomplished. Why is that? john Greim/LightRocket/Getty Images
Have you ever had a strong desire to virtually undoubtedly do yourself throw up? If you"re like most people and also say “no say thanks to you” to the opportunity of do yourself acquire sick, then you probably have minimal desire to shot the what"s end up being known together the gallon of milk challenge. Yet if you are the form who cannot withstand a test, climate this could be the one because that you. On this episode of the BrainStuff podcast, host Christian Sager defines why this an obstacle is pretty lot impossible.

You are watching: Drink a gallon of milk in an hour

The premise of the difficulty is simple: attendees drink a gallon milk as rapid as castle can, and also then effort to organize it down for an hour without puking. It appears simple, however the success price of this an obstacle is extremely small. Too many of human being have do the efforts it and also miserably failed, as YouTube is fast to document, but is the impossible? No: simply really hard and also kinda gross.


But what makes this an obstacle so an overwhelming is the amazing part. Drink a gallon of anything in a brief period, also water, is dangerous. Once you drink a gallon the water, the overloads the body"s circulatory system and also the kidneys, diluting blood electrolytes and causing cells to swell. The can even potentially cause mind damage or death. Most people who attempt to drink a gallon of milk in one hour vomit because that a variety of possible various reasons.

The first explanation one could assume entails lactose. That"s a milk sugar, and also the human body can only take care of a specific amount of it. To process lactose, the body requirements the enzyme lactase to break it down. People who space lactose intolerant have challenge processing any type of lactose, and in severe situations could litter up indigenous drinking just one glass of milk. Yet lactose intolerance, rather of being a stomach issue, is really an worry of the big intestine. Lactose it s okay digested in the tiny intestine, therefore those with lactose intolerance face problems in the huge intestine once lactose is spend by bacteria, resulting in gas and diarrhea. For this reason lactose in milk yes, really isn"t what"s staying clear of people native holding the milk down.

Calcium is another feasible culprit. One 8-ounce (237-milliliter) glass of milk has 300 milligrams the calcium; because that comparison, a chewable Tums tablet computer contains 200 milligrams of calcium, so drinking a gallon of milk is choose eating 25 Tums tablets. This yes, really messes through the mountain balance in your stomach, which offers a really an excellent reason to litter up.

But the key reason why this difficulty is nearly impossible comes down to stomach size. An median human deserve to only hold about a half-gallon (1.9 liters) of noþeles in their stomach. When you push previous that boundary, the stretch receptor in your stomach are prompted which cause emergency-overload vomiting.

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The reality is the the only civilization who deserve to reliably complete this an obstacle are expert eaters. Chugging a gallon of milk is difficult, however a gallon of anything would prove to it is in a bit messy.