Lactose vs Sugar: Which is Better?

Lactose and sugar are carbohydrates that provide sweetness to various food products. However, they differ in their composition and sources.

Sugar, which is also known as sucrose, is a general term for different types of sweet-tasting, soluble carbohydrates. Common sources of sugar include sugar cane and sugar beet. It is composed of glucose and fructose molecules, which combine to form sucrose. 

On the other hand, lactose is a naturally occurring sugar found in milk and dairy products. It is extracted from milk through a filtration process that separates the protein from the lactose. Afterward, it is dried to obtain lactose powder. This powder contains a high percentage of pure lactose, with minimal amounts of minerals and protein. Does this make it better than sugar? Let’s break it down.

Comparing Lactose vs Sugar

	Lactose	Sugar
Substitution ratio	n/a	n/a
Gluten-free?	Yes	Yes
Keto-friendly?	No	No
Paleo-friendly?	No	No
Common Allergens	Lactose	Sugarcane
Pantry shelf life (unopened/sealed)	1 year	2 plus years
Best for baking	Pie crusts, machine-dropped cookies	All of the desserts!

Differences Between Lactose And Sugar

While they share similarities in their sweet taste, there are distinct differences between lactose and sugar. Lactose is a disaccharide, meaning it is composed of two sugar molecules, glucose and galactose. It can be naturally occurring in mammal milk or extracted from it for use as an ingredient or additive in various foods and medications.

On the other hand, sugar refers to a group of sweet-tasting, soluble carbohydrates, with the standard type being sucrose. Sucrose is made up of glucose and fructose, and it is derived from sugar cane or sugar beet. Sugar is widely used as a sweetener, preservative, texture modifier, flavoring agent, and bulking agent in the food industry. It is also found in natural sources like fruits and some vegetables.

The processing of sugar involves refining to isolate and concentrate the sugar component. This results in granulated sugar. Refined sugar undergoes additional processing steps that remove impurities to obtain a pure crystalline form of sugar.

In terms of structure and physical properties, lactose can be present as lactose monohydrate, which is a powdered form commonly used as a sweetener, stabilizer, or filler in the food and pharmaceutical industries. 

Taste and Culinary Uses

Lactose, while not as intensely sweet as sucrose, still contributes a slightly sweet taste to foods and beverages. It is approximately 70% less sweet than regular sugar.

In culinary applications, lactose serves multiple purposes. It enhances the handling properties of dough and improves the color of baked goods, specifically in pie crusts. When used in machine-dropped cookies, lactose aids in the dough’s easy release and contributes to tender crusts. It also acts as a preservative and flavor enhancer. Its ability to carry colors and flavors well makes it a valuable addition to seasonings, baked goods, and various food products.

Sugar, on the other hand, is considered the gold standard of sweetness. It offers a clean and pleasant sweetness that is quick to hit the taste buds without lingering. Sugar does not possess any secondary taste or aftertaste, making it an ideal choice for adding sweetness to a wide range of culinary creations. Apart from its sweetening properties, sugar also adds color to baked goods and acts as a preservative, flavor enhancer, and bulking agent. Its versatility allows for usage in sauces, syrups, beverages, and more, where it helps increase viscosity, providing a thicker consistency and better mouthfeel.

Are Lactose and Sugar Substitutes for Each Other?

Lactose is not a great sugar substitute, as it is not nearly as sweet. Some other sugar substitutes are designed to mimic real sugar’s flavor, texture, and sweetening ability and would make much better substitutes.

Nutritional Profile And Health Benefits

• Table sugar per 2 teaspoons contains 30 calories, 8 grams of total carbs, and 8 grams of sugar. It has a Glycemic Index (GI) of 65.
• Lactose, per 2 teaspoons, also has 30 calories, 8 grams of total carbs, and 8 grams of sugars. It has a lower Glycemic Index (GI) of 46.

Lactose has been shown to have several health advantages. It aids in the absorption of essential nutrients such as calcium, zinc, and magnesium, particularly in infants and potentially in older people. It also exhibits a prebiotic effect, stimulating the growth and activity of beneficial gut bacteria. On the other hand, sugar, a simple carbohydrate, serves as a quick source of energy in the form of glucose for the body’s cells, tissues, and organs.

Diet Suitability

When it comes to diet suitability, the distinction between lactose and sugar is significant. Let’s start with sugar. Despite not being an animal product per se, the refining process of white sugar often involves bone char, making it unsuitable for a vegan diet. Sugar is also not considered keto-friendly, paleo-friendly, or whole30-friendly due to its impact on blood sugar levels and potential inflammatory effects.

On the other hand, lactose, the natural sugar found in milk, raises different considerations. Lactose is not vegan or keto-friendly, as it contains carbohydrates that can interfere with ketosis. As for the paleo diet, including dairy products remains controversial. Some adherents may include it in limited quantities, such as in medications. Lactose powder is not approved for a Whole30 diet, as it is restricted during the program.

How to Store Lactose and Sugar

For optimal preservation of sugars, it is recommended to store them in a sealed container at room temperature. Lactose powder should be kept below 77°F and with a relative humidity below 65%. Moisture absorption by the powder during storage can lead to detrimental chemical and physical alterations.

Price and Availability

You find sugar at supermarkets and wholesalers for as little as 25 cents per pound, making it more easily accessible than lactose. In the US, lactose powder prices range from $3.49 to $6.03 per pound.

Environmental Impact

Burning sugarcane has a negative impact on the environment, mainly by causing air pollution. When the leafy parts of sugarcane are burned, harmful substances like nitrates, carbon compounds, and sulfates are released into the air. These substances contribute to climate change.

Lactose production, which is usually derived from cow’s milk, has a significant environmental impact, too. It produces greenhouse gas emissions, requires a vast amount of land, and consumes large quantities of water.

Lactose vs. Sugar: The Ultimate Verdict

Except for medication production, I don’t see the purpose of lactose powder for baking. It isn’t as sweet and isn’t a good sugar substitute. Plus, if you are lactose intolerant like I am, you can’t have it at all! Sugar for me, please.

FAQs