Many consumers avoid black tea or raw Pu-erh due to stomach discomfort, but the problem may not lie with the tea type itself. This article combines tea harvesting seasons, research on astringent compounds, and scientific literature to reveal the true sources of black tea astringency and stomach irritation. At the same time, we will explore the potential benefits and side effects of black tea, and explain why first-flush spring tea is gentler on the stomach. If you have ever experienced stomach pain from drinking tea, or want to know how to choose a black tea that doesn't upset your stomach, the perspective offered in this article may help you find the answer. Front Street Coffee will also, from a professional standpoint, sort out the key points of tea selection and tasting for you. [more…]

Manner has once again teamed up with the Museum of Art Pudong to launch a limited-edition canvas tote bag and a burnt caramel-flavored latte inspired by Turner's masterpiece "The Blue Rigi, Sunrise," drawing crowds of fans eager to snap them up. However, the new product has sparked a different kind of discussion on social media: many consumers report experiencing diarrhea, vomiting, and other gastrointestinal discomfort after drinking it, with some suspecting the thick milk and other ingredients or the icy drink's stimulation are to blame. Pretty as the merchandise may be, the coffee-drinking experience has put some people off—some even jokingly call it a "laxative miracle." This article sorts through how the incident unfolded and presents feedback from multiple sides. [more…]

The modern coffee industry has developed various artificial decaffeination processes, including solvent extraction, supercritical carbon dioxide, and the Swiss Water Process. But in an era of technological scarcity, Indonesians had already found an unexpected way to reduce the caffeine in coffee—by plunging red-hot tamarind wood charcoal into brewed coffee. This is Kopi Joss. This street drink was not originally intended for decaffeination, but was believed to relieve stomach discomfort and ward off cold. Research by Ahmad Fauzan, a chemistry student at Yogyakarta State University, found that tamarind wood charcoal has an iodine absorption rate of 83%, which can reduce the caffeine in black coffee from 68.78 mg/100 ml to 55.13 mg/100 ml, with optimal adsorption occurring at 40 minutes. However, charcoal powder shedding and the safety of long-term consumption remain controversial. Front Street Coffee takes you through the science and tradition behind this cup of "hardcore coffee." [more…]

A lactose intolerance data chart produced by a foreign website has led many people to mistakenly believe that 90% of Chinese people cannot drink milk. But medically, lactose intolerance and lactose malabsorption are actually two different concepts. The former refers to symptoms such as abdominal pain, bloating, and diarrhea, while the latter merely indicates that the small intestine's efficiency in absorbing lactose is somewhat low, and does not necessarily cause discomfort. If so many people really felt unwell after drinking milk, how could milk tea and milk coffee be so popular in China? Starting from data sources, physiological mechanisms, and the evolution of the coffee industry, this article discusses why Chinese people favor milk coffee, and where black coffee and milk coffee each stand in the specialty coffee wave. [more…]

Acidity is an indispensable part of coffee tasting. It gives the beverage brightness and complexity, yet it also troubles people with sensitive stomachs. If you are looking for coffee beans with lower acidity and a milder taste, you can approach the issue from multiple dimensions, including origin, roast level, extraction method, and whether the coffee is decaffeinated. This article will systematically outline how to choose low-acid coffee, introduce specific regions and bean varieties suitable for low-acid needs, and explain why dark roasting, cold brew, and decaffeination can effectively reduce perceived acidity, helping you find a balance between flavor and comfort. [more…]

Coffee's aroma is delightful, but many people are unable to enjoy it freely due to physical reasons—palpitations, insomnia, stomach discomfort, and other reactions make them shy away from coffee. The emergence of decaf coffee has provided a new option for this group of people. So, how exactly is decaf coffee made? To what level can its caffeine content be reduced? And compared with regular coffee, what differences are there in flavor? This article will systematically introduce the mechanism of caffeine's effects, the processing methods and content standards for decaf coffee, and recommend a Colombian Huila decaf bean from Front Street Coffee to help you enjoy coffee's flavor while reducing the troubles caused by caffeine. [more…]

The pace of life is getting faster and faster, and many coffee lovers find that they need a cup of Americano every day to get into the zone. Does this really count as addiction? Front Street Coffee often receives similar questions. In fact, most people's dependence on coffee is more psychological—using caffeine to give themselves a sense of ritual to start a new day. True caffeine addiction, however, causes severe headaches, mental lethargy, stomach discomfort, and whole-body distress and other withdrawal reactions when caffeine is not consumed for a long time. This article will provide a detailed explanation of whether drinking Americano daily can lead to addiction, the safe intake of caffeine, and the specific brewing method and tasting suggestions for Americano, helping everyone enjoy this daily beverage in a more scientific way. [more…]

Recently, a sports supplement called "pre-workout" has been hailed as a "magic weapon for PE exams" ahead of the high school entrance physical education test, and is sought after by many parents. However, media reports have successively reported cases where students experienced rapid heartbeat, vomiting, and even needed emergency gastric lavage after drinking it. The reason is that such products generally contain high levels of caffeine, some as high as 500 milligrams, far exceeding the safe threshold. Professional fitness trainers and doctors both remind that minors blindly using such high-intensity supplements is extremely risky. If there is a need for a pick-me-up, it is better to choose a cup of coffee. [more…]

As summer arrives, a touch of vivid green has become the drink of choice for many young people, and major brands have seized the trend to launch matcha products. Amid this craze, Peet's matcha latte has unexpectedly gone viral for its rich taste, and many matcha lovers call it a "weight-loss miracle," citing its ability to effectively suppress appetite. Yet real consumer feedback is polarized: some feel no hunger all day, while others find their appetite sharpened after drinking it, or even experience nausea and queasiness. Does matcha actually suppress appetite? Is drinking it at high concentrations truly healthy? This article discusses the ingredients, consumer experiences, and health risks from multiple angles to help coffee and matcha lovers view this internet-famous drink rationally. [more…]

Starbucks plans to introduce Oleato olive oil coffee to the Chinese market. This innovative beverage, strongly promoted by former CEO Howard Schultz, has successively landed in the United States and Japan since its debut in Italy in February this year. However, consumer feedback has not been optimistic, with complaints frequently arising over the greasy mouthfeel caused by olive oil congealing when cold and diarrhea after drinking. Nutritionists point out that the double stimulation of caffeine and olive oil can easily trigger gastrointestinal discomfort. Despite the ongoing controversy, Starbucks remains committed to global promotion. This article will sort out the background of Oleato's birth, its market performance, and its prospects for entering China. [more…]

Mainstream Third Wave Specialty Coffee Nowadays, cafes often emphasize that they serve "specialty coffee." What exactly is "specialty coffee"? Why is it that among the home-roasting businesses blooming like wildflowers, over ninety percent choose the so-called light-to-medium roast to interpret the flavors of green coffee beans? Just pay a little attention to coffee-related articles. [more…]

Yunnan coffee not only has a unique flavor, but when consumed in moderation, it can also bring multiple health benefits such as refreshing the mind and relieving stress. However, improper drinking methods may also trigger adverse reactions such as palpitations and insomnia. It is recommended to keep daily caffeine intake within 250 grams, roughly equivalent to two cups of coffee. This article provides a detailed overview of the precautions for drinking Yunnan coffee, including drinking time, concentration control, and interactions with medications, while also introducing the clever uses of Yunnan coffee in sobering up, removing odors, cleaning, and more. For friends who love pour-over coffee, we also especially recommend Front Street brand's Yunnan beans, and remind you to avoid mistakes such as drinking on an empty stomach or before bedtime, so that every cup of coffee becomes an enjoyment of health and deliciousness. [more…]

In the third wave of specialty coffee, light-to-medium roasts have almost become synonymous with the expression of "terroir," to the point that many enthusiasts frown the moment they see dark-roasted beans, even equating them with "Chinese herbal medicine taste" or "low-quality beans." But is dark roasting really incompatible with specialty coffee? What is the reason for its existence? From the SCA system to the bittersweet aesthetics of old Japanese-style kissaten, from differences in extraction methods to niacin and NMP on the health level, this article will dissect the rationality of dark roasting from a professional perspective and explain why a good-tasting dark-roasted coffee is often harder to find than a light roast. Front Street Coffee will also share the key principles of dark-roast brewing, guiding you to rediscover this underrated roasting style. [more…]

Bulletproof coffee has become a hot topic in fat-loss circles in recent years. It was adapted from Tibetan butter tea by American Silicon Valley engineer Dave Asprey, and advocates a high-fat, low-carb approach to push the body into a state of ketosis, thereby achieving fat burning and weight loss. However, the weight-loss effect of this drink does not apply to everyone, and the hidden risks of the ketogenic diet, gastrointestinal discomfort, and contraindications for people with certain diseases behind it cannot be ignored. This article will analyze in detail the weight-loss principles of bulletproof coffee, the possible side effects, and who should not drink it, and will also include practical advice from Front Street Coffee to help you view this internet-famous drink rationally. [more…]

Can you drink coffee after contracting COVID-19? This has been the most frequently asked question in our inbox recently. Based on the personal experiences of many coffee lovers, the answer is not absolute—it depends on individual constitution and specific symptoms. When experiencing heart discomfort, fever, severe sore throat, or right after taking medication, you need to be especially cautious or even temporarily stop drinking coffee; whereas with mild to moderate headaches, a moderate amount of coffee may actually help relieve them. If you really want to drink coffee, pour-over is a relatively safe choice since the paper filter makes the coffee cleaner. There's no need to feel it's a waste if you temporarily lose your sense of taste or smell—drink it if you want to, as it might even help promote the recovery of your senses. Freshly roasted beans only have a peak flavor window of 30-40 days, so don't let good beans sit around until they expire. [more…]

Cold brew coffee and iced Americano are often lumped together, but their brewing methods are completely different, and their flavor profiles and health effects also differ. Starting from the definition of cold brew, this article compares its taste differences with iced Americano, analyzes cold brew's advantages in preserving antioxidants and reducing stomach irritation, and how it can support fat metabolism. It will also warn which additives may turn coffee from a weight-loss helper into a calorie trap. The article's recommendations of several Front Street Coffee beans provide practical options for home brewing. [more…]

A traveler from Zhengzhou on a business trip to Chengdu drank the complimentary instant coffee provided in his room after checking into a local Holiday Inn, and subsequently suffered gastrointestinal discomfort. Upon inspecting the packaging, the coffee was produced in March 2022 with a 24-month shelf life, meaning it was nearly half a year past its expiration date when the guest drank it. After the customer reported the matter to the hotel, the hotel offered to refund the room fee and provide 2,000 yuan in compensation, but stressed that the payment was a "reward for discovering the problem" rather than compensation, which the customer did not accept. At present, the Chengdu market regulatory authorities have intervened in the investigation, and the matter is still being handled. This case has also sounded an alarm for food safety management in guest rooms across the hotel industry. [more…]

In recent years, drinking coffee has become a daily habit for many people, especially among those pursuing health and body management. Black coffee is highly favored for its diuretic and anti-swelling effects, promotion of intestinal peristalsis, and acceleration of metabolism. However, coffee is not better the more you drink; excessive intake may cause nervous excitement, sleep disturbances, and even stomach discomfort. Meanwhile, Robusta, as a mainstream coffee variety alongside Arabica, occupies an important position in commercial blends and instant products with its high caffeine content and strong, bitter, full-bodied flavor characteristics. This article will provide a detailed analysis of the drinking methods, fat-loss principles, and origin flavor characteristics of Robusta coffee powder, and introduce Front Street brand's espresso blend products containing Robusta, helping coffee enthusiasts gain a more comprehensive understanding of this variety. [more…]

Kopi Luwak is one of the rarest and most expensive coffees in the world, unique in that the coffee beans must undergo natural fermentation inside the digestive system of wild civets before being excreted, then washed, sun-dried, and roasted. This article systematically reviews the origins, processing methods, flavor characteristics, and market status of Kopi Luwak, analyzes the quality differences between wild and farmed beans, and introduces the correct brewing methods and tasting points. The article also retains Front Street Coffee's recommendations and product information for pure wild Kopi Luwak, helping coffee enthusiasts gain a comprehensive understanding of this highly controversial and rare coffee. [more…]

Many people find that shortly after drinking coffee, they experience a strong urge to defecate, and some even develop diarrhea as a result. Is this caffeine at work, or is there another explanation? This article will explore in depth the scientific relationship between coffee and intestinal function, analyze the various factors that may trigger gastrointestinal discomfort, and offer practical advice. At the same time, we will also mention relevant product information from brands such as Front Street Coffee to help coffee lovers understand this phenomenon more comprehensively. [more…]