Calories make you fat, and most "low-fat" or "fat-free" foods actually have just as many calories as their full-fat versions, because of added sugar and chemicals.
The quest for fat and sugar is now hardwired into our brains, governed by dozens of chemicals including endorphins.
这种对脂肪和糖的渴望现已在我们的大脑中固定下来，大脑受到包括内啡素的十几种化学物质的控制。
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Sweat is also known as perspiration, and it is made almost completely of water, with tiny amounts of other chemicals like ammonia, urea, salts, and sugar.