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目前显示的是标签为“caffeine tolerance”的博文

Coffee for Energy? 3 Drinking Habits That Actually Make You More Tired

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 You chug a big cup of coffee in the morning, but still feel half-asleep. In the afternoon, you grab another cup hoping to power through work—yet somehow, your energy drops even lower. If that sounds familiar, the problem might not be the coffee itself… it might be the way you’re drinking it. Today, let’s talk about three common coffee mistakes that secretly drain your energy instead of boosting it. I’ve made all of these mistakes myself—so consider this your shortcut to staying alert without crashing. ☕ 1. Coffee + Sugar: Double the Pleasure or Double the Burnout? Many people add sugar or creamer to make their coffee taste smoother. But that sweetness can quietly sabotage the energizing effect of caffeine. Here’s why: when you consume a lot of sugar, your body releases insulin to bring down your blood sugar. That quick spike and crash can make you feel even more tired. The result? Caffeine’s boost gets canceled out by the drowsiness that follows a sugar crash. One of my ...

Why Coffee Makes Some People Poop and Others Constipated: The Science Behind Caffeine’s Gut Effects

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 “Every time I drink coffee, I have to run to the bathroom within half an hour—it’s like my body has an alarm clock.” “I drink two cups of coffee every day, but I often feel bloated and constipated. Sometimes I even wonder if I should just give up coffee.” On October 16, the hashtag “The first batch of coffee lovers has fallen victim” started trending online. Netizens shared their very different gut reactions to coffee—some experience diarrhea, while others get constipated. Caffeine’s Dual Effect: It Can Both Relieve and Cause Constipation Why can the same cup of coffee produce two completely opposite effects? According to Cui Jun, Chief Dietitian at Beijing Electric Power Hospital, coffee’s impact on digestion is the result of multiple factors—mainly caffeine stimulation and acidic compounds. Caffeine stimulates stomach acid secretion and speeds up intestinal movement. A single intake of 100 mg of caffeine (roughly one espresso) can increase intestinal motility by nearly 3...