What Is Nutrition Science? | 什么是营养科学？

What Is Nutrition Science? | 什么是营养科学？

Have you ever wondered why your parents tell you to eat your vegetables? Or why milk is often called "nature's perfect food"? What about why some foods give you energy to run and play, while others seem to make you feel tired? These are exactly the kinds of questions that nutrition scientists spend their lives trying to answer. Nutrition science is the study of how food affects your body—how it helps you grow, how it gives you energy, and how it keeps you healthy. It's a fascinating field that touches every single day of your life, whether you realize it or not.

你是否曾经好奇，为什么爸爸妈妈总是让你吃蔬菜？为什么牛奶常常被称为"大自然的完美食物"？还有，为什么有些食物能让你精力充沛地奔跑玩耍，而有些食物却似乎让你感到疲倦？这些正是营养科学家穷其一生都在努力解答的问题。营养科学是研究食物如何影响你身体的一门学科——它如何帮助你成长，如何给你提供能量，如何让你保持健康。这是一个引人入胜的领域，它与你生活的每一天都息息相关，尽管你可能从未意识到这一点。

When we talk about nutrition science, we're really talking about understanding the relationship between what you eat and how your body works. Think of your body like an incredibly complex machine—actually, it's even more amazing than any machine ever built! Just like a car needs the right fuel to run properly, your body needs the right kinds of food to function at its best. Nutrition scientists are like detectives who investigate this relationship, searching for clues about which foods help us thrive and which ones might cause problems.

当我们谈论营养科学时，我们实际上是在讨论理解你所吃的食物与你身体运作方式之间的关系。把你的身体想象成一台极其复杂的机器——实际上，它比任何机器都要神奇！就像汽车需要正确的燃料才能正常行驶一样，你的身体也需要正确的食物才能发挥最佳状态。营养科学家就像侦探一样，研究这种关系，寻找关于哪些食物能帮助我们健康成长、哪些食物可能引起问题的线索。

The History of Nutrition Discovery | 营养发现的历史

The story of nutrition science didn't begin in laboratories with fancy equipment. It started thousands of years ago when our earliest ancestors first wondered about the connection between food and health. Understanding this history helps us appreciate how far we've come and why modern nutrition science matters so much.

营养科学的故事并不是从配备着先进设备的实验室开始的。它始于数千年前，当时我们最早的祖先第一次开始思考食物与健康之间的联系。了解这段历史有助于我们珍惜我们取得的进步，也让我们明白现代营养科学为何如此重要。

Ancient Wisdom About Food | 古代关于食物的智慧

Long before scientists had microscopes or laboratory equipment, ancient civilizations around the world noticed patterns in how food affected people's health. The ancient Egyptians, for example, believed that certain foods had healing powers. They fed athletes specific diets to help them perform better in competitions, and they used garlic and onions to treat infections and boost strength. Ancient Chinese healers developed detailed systems linking different foods to different organs and body systems, ideas that still influence some approaches to eating today.

早在科学家拥有显微镜或实验室设备之前世界各地的古代文明就注意到了食物如何影响人们健康的规律。例如，古埃及人相信某些食物具有治愈力量。他们为运动员配备特定的饮食方案，帮助他们在比赛中表现得更好，他们还用大蒜和洋葱来治疗感染和增强体力。古代中国的医者开发了详细的系统，将不同的食物与不同的器官和身体系统联系起来，这些思想直到今天仍然影响着一些饮食方法。

The ancient Greek physician Hippocrates, often called the "Father of Medicine," famously declared, "Let food be thy medicine and medicine be thy food." This revolutionary idea suggested that what you eat directly impacts your health. Hippocrates observed his patients carefully and noticed that some recovered from illness faster when they ate certain foods. While he didn't have the scientific tools we have today to understand why this was true, his observations laid important groundwork for future discoveries.

古希腊医师希波克拉底常被称为"医学之父"，他有一句名言："让食物成为你的药物，让药物成为你的食物。"这个革命性的观点表明，你所吃的食物直接影响你的健康。希波克拉底仔细观察他的病人，注意到当他们吃某些食物时，康复得更快。虽然他没有我们今天拥有的科学工具来理解其中的原因，但他的观察为未来的发现奠定了重要基础。

Medieval cooks and scholars continued building on this ancient wisdom. Monks in European monasteries carefully documented which herbs helped with digestive problems, which foods preserved health during winter months, and which diets seemed to prevent illness. In monasteries across England, France, and Germany, monks grew gardens filled with medicinal plants and vegetables, recording their observations about the healing properties of different foods. These early nutrition detectives gathered valuable information, even without understanding the scientific mechanisms behind their observations.

中世纪的厨师和学者继续在古代智慧的基础上进行积累。欧洲修道院里的僧侣们仔细记录哪些草药有助于消化问题，哪些食物能在冬季保持健康，哪些饮食似乎能预防疾病。在英格兰、法国和德国的修道院中，僧侣们种植了满是药用植物和蔬菜的花园，记录他们对不同食物疗效的观察。这些早期的营养侦探收集了宝贵的信息，即使他们并不理解他们观察背后的科学原理。

The Birth of Modern Nutrition Science | 现代营养科学的诞生

The real revolution in nutrition science began in the late 1700s and accelerated through the 1800s. This was when scientists started asking more precise questions and developing methods to answer them. What exactly is in food that makes it good for us? Are there specific substances we need to survive? How much of each substance do we require?

营养科学的真正革命始于18世纪末，并在19世纪加速发展。正是在那个时候，科学家们开始提出更精确的问题，并开发出回答这些问题的方法。食物中究竟有什么物质对我们有益？是否有我们生存所必需的特殊物质？我们每种物质需要多少？

In 1772, the French chemist Antoine Lavoisier conducted experiments that changed everything. He discovered that when we digest food, our bodies are essentially "burning" it—like a fire burning wood—to release energy. Lavoisier used a device called a calorimeter to measure how much heat was produced when different foods were "burned." He found that different foods released different amounts of energy. This was a groundbreaking discovery because it showed that food contains measurable, quantifiable energy that our bodies use. We now know this energy as calories, and understanding calories remains fundamental to nutrition science today.

1772年，法国化学家安托万·拉瓦锡进行的实验改变了一切。他发现，当我们消化食物时，我们的身体本质上是在"燃烧"它——就像火燃烧木头一样——来释放能量。拉瓦锡使用了一种叫做量热计的仪器来测量不同食物被"燃烧"时产生多少热量。他发现不同的食物释放出不同量的能量。这是一个开创性的发现，因为它表明食物含有可测量、可量化的能量，我们的身体利用这些能量。我们现在知道这种能量就是卡路里，理解卡路里在今天仍然是营养科学的基础。

The next major breakthrough came in the early 1800s when scientists began identifying the specific components of food. In 1816, the French chemist Michel Eugène Chevreul discovered fat in its pure form, distinguishing it from other food substances. Around the same time, other chemists identified protein as a distinct nutrient. By the mid-1800s, scientists had identified what we now call the three main energy nutrients: carbohydrates, proteins, and fats. Each plays a different role in your body, and getting the right balance of all three is essential for good health.

下一个重大突破发生在19世纪初，当时科学家们开始识别食物的具体成分。1816年，法国化学家米歇尔·欧仁·谢夫勒尔以纯净形式发现了脂肪，将其与其他食物物质区分开来。大约在同一时期，其他化学家识别出蛋白质是一种独特的营养素。到19世纪中期，科学家们已经识别出我们现在所说的三种主要能量营养素：碳水化合物、蛋白质和脂肪。每一种都在你的身体中扮演不同的角色，获得所有三种的正确平衡对健康至关重要。

The Vitamin Revolution | 维生素革命

Perhaps the most dramatic chapter in nutrition history involves the discovery of vitamins in the early 1900s. Before vitamins were identified, thousands of sailors suffered and died from a disease called scurvy during long sea voyages. In 1747, a British naval surgeon named James Lind conducted what many historians consider one of the first controlled scientific experiments. He divided sick sailors into groups and gave each group different treatments. The group that received citrus fruits—oranges and lemons—recovered quickly, while the others did not. Lind had discovered that certain foods could cure scurvy, but he didn't know why.

营养史上最引人注目的篇章可能涉及20世纪初维生素的发现。在维生素被识别之前，数千名水手在漫长的航海中因一种叫做坏血病的疾病而受苦甚至死亡。1747年，一位名叫詹姆斯·林德的英国海军外科医生进行了许多人认为是最早的对照科学实验之一。他将生病的水手分成几组，给每组不同的治疗。摄入柑橘类水果——橙子和柠檬——的那组恢复得很快，而其他组则没有。林德发现了某些食物可以治愈坏血病，但他不知道原因。

It took more than a century for scientists to solve this puzzle. In 1897, a Dutch scientist named Christiaan Eijkman discovered that brown rice contained a substance that could prevent beriberi, a disease that caused weakness and nerve problems. Then, in 1912, Polish chemist Casimir Funk coined the term "vitamine" by combining "vital" and "amine" (a type of chemical compound). He proposed that these vital amines were the mysterious substances in food that prevented diseases like scurvy and beriberi. Funk was right—there are indeed substances in food that our bodies need in tiny amounts to function properly, and we now call them vitamins.

科学家们花了一个多世纪才解开这个谜团。1897年，荷兰科学家克里斯蒂安·艾克曼发现糙米含有一种可以预防脚气病的物质，脚气病是一种导致虚弱和神经问题的疾病。然后，在1912年，波兰化学家卡西米尔·芬克结合" vital"（ vital）和"amine"（一种