From the field to the centrifuge: let’s take a closer look at how physics and chemistry transform bitter plant sap into refined white sugar.
Sugar is ubiquitous in our daily lives, appearing in everything from our morning coffee to the hidden sauces in processed foods. During the current 2025/2026 season, the global industry produced a staggering 190 million tons of the substance. Yet we rarely consider the complex technological journey a single white crystal takes to reach our tables, nor do we often question whether its impact on our health is as simple as it seems.
The process of making sugar involves far more than merely squeezing out juice. Roughly 80% of the world's sugar is sourced from sugarcane plantations, while the remainder comes from sugar beets. At the processing plants, the raw material is crushed and converted into what is known as diffusion juice. At this initial stage, the liquid is dark and opaque. To purify it, processors utilize a mixture of milk of lime and carbon dioxide. This procedure, known as carbonation, causes impurities to settle out. The resulting clear syrup is then evaporated in vacuum pans until it becomes a thick mass called massecuite, where the first microcrystals begin to take shape. Centrifuges spinning at speeds of up to 2,800 RPM then separate the pure white sugar from the dark, nutrient-dense molasses. The final step involves drying the product with hot air to reach a precise moisture level of 0.02%.
The Production Stage
What happens inside the machinery?
Extraction
This stage involves using hot water to wash sucrose out of beet pulp or pressing sugarcane to extract its liquid.
Saturation
The juice is purified using milk of lime (Ca(OH)2) and gas (CO2) to bind and remove unwanted impurities.
Crystallization
The liquid is boiled under a vacuum and seeded with sugar micro-particles to facilitate the growth of crystals.
Centrifugation
High-speed rotation is used to separate the white crystals from the liquid molasses.
The finished product is pure sucrose—a disaccharide composed of glucose and fructose. Once consumed, it is broken down almost immediately by the body. Glucose serves as the fundamental fuel for our brain cells and muscles. Without it, the body cannot generate energy rapidly. This highlights the primary benefit of sugar: it serves as the most accessible and efficient energy and anti-stress resource during emergency situations.
The problem lies not with the substance itself, but with the sheer volume and the form in which it is consumed. Evolution did not design the human body to handle highly refined products. When we consume whole fruit, the fiber helps slow the absorption of carbohydrates. In contrast, pure white sugar causes an immediate spike in blood glucose levels, triggering a massive release of the hormone insulin. Over time, these constant fluctuations lead to a decrease in insulin sensitivity within the cells. As a result, the body can no longer distribute energy effectively, instead shunting the excess into fat stores.
Modern medicine does not suggest a total elimination of sugar, as that could eventually lead to energy deficits and impaired cognitive function. Instead, the focus is on developing a culture of moderation. Sensibly limiting the amount of added sugar in one's diet can significantly improve metabolic markers and reduce the strain on the pancreas, all while preserving the benefits of healthy carbohydrate metabolism.
