Like, water has no calories. But plants do? And some random elements have like billions of calories but if you just pick up a rock and eat it you won’t get any energy.
In: Biology
There’s a 449 rule that everyone should know. It’s a rule of thumb and take with that grain of salt!
It states that on average, 1 gram of carbs or protein contain 4 calories and 1 gram of fat contains 9 calories. So to calculate the total calories for a food you’d sum: (grams of carbs x 4) + (grams of protein x 4) + (grams of fat x 9).
Look at your food now. Which of the above three do you expect in it? Water? None. Plants? Carbs and protein. That donut? Lot of sugar (equivalent of carbs) and fat. Potato fries? Lot of fat (that too saturated) and carbs
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