Sugar is far more than just a simple flavoring agent that adds sweetness to food and creates a pleasant taste experience. It plays a complex and multifaceted role in our diet and overall health. On one hand, sugar is an essential nutrient and an important part of the five major categories of nutrients, which also include proteins, fats, vitamins, and minerals. On the other hand, excessive sugar consumption has been linked to various health issues such as obesity, type 2 diabetes, and dental problems. To address these concerns, the food industry has increasingly turned to various sweeteners-substances that provide a sweet taste but may or may not contribute calories. Sweeteners can be broadly divided into two categories: nutritive sweeteners (such as sugar alcohols) and non-nutritive sweeteners (such as saccharin, sucralose, aspartame). Therefore, the key to staying healthy is consuming sugar in moderation, not overindulging in sweetness. This means that in daily life, there is no need to completely avoid sugar or sweetness, nor should one blindly pursue so-called "sugar-free" foods without understanding their actual composition. In fact, many natural foods, such as fruits, vegetables, and dairy products, inherently contain sugar. For example, an apple contains natural fructose, and milk contains lactose. These natural sugars come packaged with fiber, water, vitamins, and other nutrients that help the body process them more healthily. Meanwhile, sweeteners offer an alternative way to enjoy sweetness without the same caloric burden, but their safety and tolerance vary from person to person.
What scientific sugar control truly targets is "added sugar" - the sugar introduced during food processing, as opposed to the sugar naturally present in the food itself. Added sugars are those that manufacturers put into products to enhance flavor, extend shelf life, or improve texture. Common added sugars include sucrose (table sugar), fructose (found in high-fructose corn syrup), and glucose. These sugars are often hidden in processed foods such as soft drinks, candies, baked goods, and even seemingly healthy items like yogurt and granola bars. According to the recommendations of the Chinese Dietary Guidelines (2022), daily added sugar intake should not exceed 50 grams per person, and it is best kept below 25 grams. To put this into perspective, a single 330-milliliter can of regular soda contains about 35 grams of sugar, already exceeding the ideal daily limit. Therefore, being mindful of added sugar intake is a practical and scientifically sound approach to maintaining good health.
For individuals who need to manage their sugar intake - such as those with diabetes, prediabetes, or weight management goals - it is advisable to choose pre-packaged foods with lower sugar content or those labeled "low sugar" or "sugar-free." However, these labels can sometimes be misleading. At the same time, consumers should carefully read the ingredient list and nutrition facts panel to understand what sweeteners are used and the overall energy content of the product. It is important to note that a label stating "no sucrose" or "zero sucrose" does not mean the product is completely free of sugar. Such products simply do not contain sucrose-based ingredients such as white sugar, brown sugar, rock sugar, or red sugar, but they may still contain other types of sugars, such as glucose, fructose, or starch syrup. For instance, a "sucrose-free" cookie might still contain maltose or fruit juice concentrate, which are also forms of sugar and contribute to calorie intake. Thus, reading the nutrition facts panel is essential for making informed choices.
To protect public health, China has established strict regulations regarding the use of sweeteners in food production. The country's current National Food Safety Standard: Standards for the Use of Food Additives (GB 2760-2014) clearly specifies which sweeteners are permitted, their applicable food categories, and maximum usage levels. When used within these limits, these sweeteners are safe and reliable. However, it is worth emphasizing that people's tolerance for sugar alcohols - a common type of low-calorie sweetener - varies significantly. Some consumers may experience discomfort, such as diarrhea or bloating, if they consume large amounts of sugar alcohols in a short period. Sugar alcohols like sorbitol, xylitol, and maltitol are often found in sugar-free gum, candies, and desserts. Therefore, it is recommended that individuals choose products containing sugar alcohols according to their own circumstances and consume them in moderation. Starting with a small portion to test personal tolerance is a wise practice.
In addition, another widely used artificial sweetener, aspartame, deserves special attention. Aspartame is broken down by enzymes in the human digestive tract into phenylalanine, aspartic acid, and trace amounts of methanol. These breakdown products are normally harmless for most people. However, because individuals with phenylketonuria (PKU) - a rare genetic disorder - cannot metabolize phenylalanine properly, even small amounts can accumulate to toxic levels, potentially causing severe brain damage. Consequently, any food containing aspartame must clearly display a warning on the product label stating: "Not suitable for patients with phenylketonuria." This labeling requirement is a critical public health measure that protects vulnerable populations while allowing the general public to safely enjoy low-calorie sweetened products. In summary, understanding the science behind sugar and sweeteners empowers consumers to make balanced, informed dietary choices without unnecessary fear or blind faith in marketing claims.