Scientists discover breakthrough method to produce rare, healthier sugar ~ PARN HARIT

While the whole world is crazy about sugar, doctors have time and again reminded us of its horrendous side effects. However, sugar is something not everyone can quit, and so, many people choose substitutes – and even they rarely live up to the promise. So now, scientists say they have found a rare sugar that comes from most plants, thanks to a new, cheaper way to make it.

A new study from Tufts University has come up with a way to make tagatose - a rare sugar that tastes just like table sugar but has way too few calories and less impact on your blood sugar.

“The key innovation in the biosynthesis of tagatose was in finding the slime mold Gal1P enzyme and splicing it into our production bacteria,” Nik Nair, associate professor of chemical and biological engineering at Tufts, explained in a news release. “That allowed us to reverse a natural biological pathway that metabolizes galactose to glucose and instead generate galactose from glucose supplied as a feedstock. Tagatose and potentially other rare sugars can be synthesized from that point.”

Because tagatose is only partially absorbed in the small intestine and largely fermented by gut bacteria in the colon, it has a minimal effect on blood glucose and insulin levels, an important consideration for people with diabetes or insulin resistance.

What does tagatose look like?

While many other sugar substitutes may not, tagatose works as a bulk sweetener. It means that it can easily replace sugar, not just for sweetness, but also for texture in cooking and baking.

It even browns like sugar when heated.

One of the best ways it works is to stop tooth decay, which normal sugar causes, and supports healthy gut bacteria.In early 2026, a major scientific breakthrough has emerged in the quest for a "perfect" sugar substitute. Researchers at Tufts University have developed a novel biosynthetic method to mass-produce Tagatose, a rare natural sugar that offers nearly the same sweetness as table sugar but with a fraction of the health risks.

This discovery is particularly significant because it transforms a "rare" and expensive niche product into something that could soon be as affordable and common as regular sugar.

What Makes Tagatose Different?

Unlike artificial sweeteners (like aspartame or stevia), tagatose is a monosaccharide—a real sugar—found naturally in dairy and some fruits. However, it behaves very differently in the body:

Sweetness: It is 92% as sweet as table sugar (sucrose).
Calories: It contains about 60% fewer calories (roughly 1.5 kcal/g compared to 4 kcal/g for sucrose).
Metabolic Impact: Only about 20% of tagatose is absorbed by the small intestine. This results in a minimal effect on blood glucose and insulin levels, making it a viable option for those managing diabetes or insulin resistance.
Cooking: Unlike many substitutes, tagatose can brown and caramelize, making it ideal for baking.

The "Factory" Breakthrough: Engineered Bacteria

The high cost of tagatose previously stemmed from the difficulty of extracting it or converting it from other sugars. The Tufts team, led by Professor Nik Nair, solved this using synthetic biology:

The Microbial Factory: They engineered E. coli bacteria to act as tiny biological factories.
The Slime Mold Secret: The researchers inserted a specialized enzyme sourced from slime mold (Dictyostelium discoideum).
The Conversion: This enzyme allows the bacteria to efficiently convert glucose—the most abundant and cheapest sugar—directly into tagatose.
High Yield: Previous methods were inefficient and costly. This new process achieved a 95% yield, drastically reducing production costs and making large-scale commercial use economically feasible for the first time.

Health & Wellness Benefits

Beyond weight management and blood sugar control, tagatose offers several unique advantages:

Gut Health (Prebiotic): Because it isn't fully absorbed, tagatose moves to the colon where it acts as a prebiotic, fueling beneficial gut bacteria.
Dental Health: Unlike table sugar, which fuels cavity-causing bacteria, tagatose has been found to inhibit the growth of oral bacteria that lead to tooth decay.
FDA Status: It is already classified as "Generally Recognized as Safe" (GRAS) by the FDA, meaning it can be integrated into consumer products as soon as production scales up.

Timeline to the Table

With the global rare sugar market projected to grow significantly through 2026, this breakthrough is expected to accelerate the appearance of tagatose in "better-for-you" sodas, keto-friendly baked goods, and functional snacks. Industry analysts suggest that as production facilities adopt this enzymatic method, the price gap between rare sugars and sucrose will continue to shrink.

Did You Know? > Tagatose was actually discovered as a potential sweetener in the 1980s, but it remained a "luxury sugar" for decades because it was too difficult to make. This 2026 breakthrough finally removes that industrial hurdle.

What is tagatose?

Tagatose is a naturally occurring sugar that shows up in very small amounts in foods like milk and certain fruits. Because it is so rare, tagatose has been difficult and costly to make in large amounts.

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It is about 92 per cent as sweet as table sugar, but it has around 60 per cent fewer calories. According to studies, tagatose only causes small increases in blood sugar and insulin, making it potentially suitable for those who have diabetes. According to experts, tagatose is already classified by the US Food and Drug Administration (FDA) as “generally recognized as safe,” meaning it can be used in food products.

How is tagatose made?

The researchers created genetically engineered Escherichia coli bacteria to act as microscopic production plants, making a biosynthetic pathway that converts abundant glucose into tagatose in a much more economically friendly manner.

The breakthrough hinges on a newly identified enzyme sourced from slime mold, known as galactose-1-phosphate–selective phosphatase (Gal1P). When combined with another enzyme, the system effectively reverses a natural metabolic pathway, first generating galactose from glucose, then converting it into tagatose. The results showed a yield that can reach up to 95 per cent, far surpassing conventional manufacturing methods, which typically achieve yields between 40 and 77 per cent.

PARN HARIT