Pu’er Coffee

 Have you ever taken just a few sips of a latte in the morning—only to feel jittery, anxious, and overstimulated for the rest of the day, like you’ve got a nervous rabbit bouncing around inside you? This isn’t necessarily because you have “low tolerance.” More often than not, it’s because your body processes caffeine more slowly than average . In this article, we’ll talk about caffeine’s slow-motion journey through the body—and the subtle clues it leaves behind. Read on and see how many apply to you. Sign #1: Afternoon “Energy Water” Turns Into a Midnight Wake-Up Call For fast caffeine metabolizers, caffeine is like a short-term visitor—hanging around for a few hours before politely leaving. For you, it’s more like a guest who refuses to go home. Key sign: If you drink coffee after 3–4 p.m—even a small cup, or sometimes just strong tea—it noticeably affects how quickly you fall asleep and how well you sleep. You may need a much longer “caffeine buffer window” than others. W...

 For many people, that first cup of coffee in the morning is the switch that turns the brain on. But more and more coffee lovers are noticing a frustrating change: You used to handle three or even four cups a day without breaking a sweat. Now? Half a cup and your heart is pounding, your chest feels fluttery, and you start wondering: “Is something wrong with my heart?” “Am I really just getting old?” The good news: you don’t need to panic. Coffee-induced heart flutters are usually not a sign of disease. They come from how your body interacts with caffeine. Today, let’s break it all down clearly—so you can keep enjoying your coffee with peace of mind. 1. Heart palpitations after coffee = caffeine doing its job First, let’s get one thing straight: feeling a bit jittery or noticing a faster heartbeat after drinking coffee doesn’t usually mean something is wrong. It’s simply caffeine doing what caffeine does. The main effect of caffeine is activating your sympathetic nervous s...

 Every morning, the elevators in office buildings are filled with the rich aroma of coffee. Sleepy office workers cling to their cups of “life support.” Some get headaches if they skip a day; others rely on coffee to survive endless nights of overtime. But the warnings never stop: “Coffee hurts your stomach,” “Coffee causes insomnia,” “Too much leads to osteoporosis.” So what’s the truth? What really happens to your body when you drink coffee for years? Let’s break it down — especially for three types of people who may need to rethink their relationship with coffee. 1. The “Sensitive Stomach” Crowd Do you feel acid rising in your stomach or even a dull ache after drinking coffee? You’re not being dramatic — your stomach is sending out an SOS. Caffeine and organic acids in coffee — such as chlorogenic acid — stimulate stomach acid secretion. For most people with healthy digestion, this is tolerable and may even help digestion. But if you already have acid reflux, ulcers, or c...

 When people try coffee for the first time, reactions usually fall into two camps: some feel warm all over after a cup, while others get a cool, almost refreshing sensation. That curious difference has sparked countless discussions—so is coffee “cold” or “warm” in nature? Even more puzzling: one person drinks a small afternoon cup and then lies awake until dawn, while another can drink right after dinner and fall asleep instantly. To understand why, we need to look at the subtle ways coffee interacts with the body. The Nature of Coffee: What Is It, Really? From the perspective of traditional Chinese medicine, coffee is considered a warming beverage. It can boost circulation and stimulate the central nervous system—which is why many people feel physically warmer after a hot cup on a chilly morning. Modern science, however, shows another side of coffee. Caffeine is a natural stimulant that temporarily increases metabolic rate, producing more body heat—this is its “warming” effect...

 As a coffee lover and professional, I’ve been guarding this little, aroma-filled café for four years now. My bar counter is like a quiet old friend, accompanying countless people through their early mornings and late nights. Every latte with delicate latte art, every pot of carefully brewed pour-over I handed to customers—what I received in return was the sparkle in their eyes. Coffee was a ritual, a comfort, a silent understanding we all shared. But over the past one or two years, a subtle shift has taken place around me. Several familiar customers, myself included, have gone through similar changes. Those regulars who used to come once a day now only show up two or three times a week, and eventually only on weekends. Take Ms. Wang, for example—the advertising director who relied on a double espresso to survive every workday. Now, when she walks in, she orders only a cup of decaf. She laughs and tells me, “It’s not that I don’t want coffee. I still love the fruity notes of Et...

 If the first thing you do in the morning is make coffee, if you always keep a latte by your side while working, and if you rely on an afternoon Americano to stay alive—does that sound like you? The aroma of coffee is truly irresistible. It not only boosts alertness but has also become an essential part of our daily lives. But what you may not know is that for some people, this dark beverage may hide certain health risks. 1. Pregnant and breastfeeding women Expectant mothers need to pay special attention. Caffeine can pass through the placenta and enter the fetus’s body, and since the baby’s metabolic system is not fully developed, it may affect fetal health. During breastfeeding, caffeine can be transferred to the baby through breast milk, potentially causing irritability and poor sleep. Many soon-to-be moms find that after giving up coffee, not only does their own sleep quality improve, but their baby becomes calmer as well. 2. People with osteoporosis Once you reach your for...

 The morning sun slips through the curtains, and for many people, the very first thing they do after waking up is make a cup of coffee. The rich aroma fills the air, instantly awakening the sleepy soul. But what you may not realize is — this daily ritual might be quietly harming your stomach. Think about it: after a night of rest, your stomach is completely empty. Then, suddenly, a cup of coffee rushes in. The caffeine in it directly stimulates the stomach lining, triggering an excessive secretion of stomach acid. With no food to digest, the extra acid ends up “corroding” the stomach walls themselves. Over time, this can lead to discomfort such as stomach pain, acid reflux, or heartburn. For many people, chronic gastritis actually begins with small, repeated habits like this. These Three Groups Should Be Especially Careful 1. People who already have stomach issues If you often experience stomach pain, bloating, or have been diagnosed with gastritis or ulcers, drinking coff...

 For many office workers, surviving the day often means running on caffeine. A cup of coffee in the morning, another after lunch, and maybe one more to power through overtime. Coffee truly helps you stay alert—but for some people, overdoing it could quietly harm your health. Let’s start with a real case: A 32-year-old office worker drank at least five cups of coffee every day to stay awake for overtime. One evening, she suddenly felt her heart racing, her hands shaking, and cold sweat pouring down. She was rushed to the hospital, where doctors diagnosed her with caffeine-induced arrhythmia. The doctor warned her seriously: “If you keep drinking coffee like this, your heart won’t be able to handle it.” Coffee can be wonderful, but it’s not for everyone. Here are eight groups of people who need to watch their caffeine intake carefully. 1. People with Heart Problems Caffeine stimulates the sympathetic nervous system, which can cause faster heartbeats and higher blood pressure. If...

 Coffee can be an amazing pick-me-up — a source of energy when fatigue hits. But here’s the thing: it’s not for everyone. For some people, that comforting cup of black coffee may be quietly draining their health instead of boosting it. Let’s take a closer look — are you one of them? 1. Those with Sensitive Stomachs Have you ever felt stomach discomfort after drinking coffee? That’s because several compounds in coffee can irritate the digestive system. Both caffeine and chlorogenic acid stimulate stomach acid production, which can worsen acid reflux or heartburn. The effect is especially strong when you drink coffee on an empty stomach — a common habit for many people rushing out the door in the morning. Over time, this can damage the stomach lining and even trigger gastritis or make existing problems worse. If you often feel bloated, nauseous, or experience stomach pain after coffee, it may be time to cut back — or take a break from caffeine altogether. 2. People at High R...

 In summer, we grab an iced Americano to cut the grease; in winter, we wrap our hands around a hot latte to stay warm. It’s a daily ritual for many office workers. But when the topic #ColdCoffeeAndHotCoffeeAren’tJustAboutTemperature started trending online, people were confused: "Wait—so I’ve been drinking it wrong this whole time? No wonder iced coffee keeps me up at night and hot coffee hurts my stomach!" The truth is, the difference between hot and cold coffee goes far beyond “temperature.” From how it’s brewed to how your body reacts to it, there’s a lot going on behind each sip. Let’s break it all down — so next time you order, you won’t regret your choice. A lot of people assume that iced coffee is just hot coffee with ice tossed in . Not quite. It’s like reheating a cup that’s gone cold — it’ll never taste like fresh hot coffee again. The real difference lies in how the coffee is extracted — the temperature and time used to pull flavor from the beans. Cold brew ...