Pu’er Coffee

 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...

  Introduction: Anyone who’s ever used a hand grinder knows this feeling well — some beans grind effortlessly, while others feel like a full-on workout. Why does that happen? Today, let’s uncover the mystery behind it. When it comes to grinding coffee, there are many factors to consider — origin, processing method, roasting level, and brewing technique. Each of these elements affects how coarse or fine the coffee should be ground for optimal extraction. However, even when using the same grinder, some beans are noticeably harder to grind than others. So, what makes certain coffee beans tougher to grind? 1. Exploring Bean Brittleness Before we go further, it’s important to distinguish between density and brittleness — two terms that are often confused but mean very different things. Density refers to the weight of a single coffee bean divided by its volume. In most cases, we talk about bulk density , which is the weight of a container filled with coffee (minus the container) ...