this post was submitted on 16 May 2026
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A meme is an idea, behavior, or style that spreads by means of imitation from person to person within a culture and often carries symbolic meaning representing a particular phenomenon or theme.
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US FDA nutritional guidelines are based on 2,000 kilocalories a day. Europeans use kilojoules to the same effect.
I'm not sure any food in the USA uses a single calorie as a measurement of anything, because kilocalories make more sense in terms of units of scale in the human diet.
2000000 of anything sounds like a lot, so why not use prefixes to simplify?
Source: https://en.wikipedia.org/wiki/List_of_countries_by_food_energy_intake
That's why you either use kcal (or Cal) or kJ, but not Mcal (or kCal, which is easily confused with kcal) or MJ, because most things you eat and drink are between 0 and a few hundred kcal. This way you have one unit and keep it consistent instead of switching between kcal and Mcal all the time or saying awkward stuff like you ate something that only had 0.004 Mcal.
While kJ is required in labeling in Europe most people still use kcal for everything. AFAIK the only country somewhat consistently using kJ is Australia (the one with the kangaroos).