Allulose: The Sugar That May Help With Weight Loss and Metabolic Health

Key Takeaways

• Allulose is a rare natural sugar with minimal calories. It provides about 70% of the sweetness of table sugar but is not significantly metabolized by the body.
• Allulose may activate AMPK. AMPK is the master regulator of metabolism and helps promote fat burning while improving insulin sensitivity.
• Allulose may increase GLP-1 release. GLP-1 helps reduce hunger and increase satiety, which can support weight loss.
• Table sugar disrupts metabolism. Sucrose breaks down into glucose and fructose, both of which contribute to insulin resistance and metabolic dysfunction.
• Excess sugar intake is a major metabolic problem. The average American consumes far more sugar than recommended levels.
• Artificial sweeteners have their own drawbacks. Many can negatively affect gut microbes and metabolic regulation.
• Allulose offers sweetness without the metabolic penalty. Because it is rapidly excreted rather than used for energy, it avoids many of the metabolic effects associated with regular sugar.

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Surprisingly, the answer is yes.  The natural sugar allulose may help support weight loss because it activates AMPK and increases GLP-1, two metabolic signals that promote fat burning and reduce hunger.

What Is Allulose?

It is a natural sugar called allulose.  It has 70% of the sweetness of table sugar, but a completely different metabolic impact.  First, it enters the blood quickly to provide the same sense of sweetness as sucrose, but it also leaves the body quickly before it can be used as energy or stored as fat.  But during that short time in the body, allulose activates AMPK (1) and enhances the release of GLP-1 from the gut to improve satiety (2).  It doesn’t get much better than that: a sweet taste that helps you lose weight. 

Why Table Sugar Disrupts Metabolism

On the other hand, table sugar (i.e., sucrose) does just the opposite; it makes you fat and keeps you hungry.  Why?  Sucrose is composed of equal parts glucose and fructose.  Sucrose can’t enter the blood, but it is rapidly broken down by enzymes in the mouth into the simple sugars, glucose and fructose.  The body very rapidly absorbs these two simple sugars.  

The Problem With Excess Sugar Intake

The average American consumes about 70 grams of sugar daily.  This is about 2-3 times more than the recommendations by the American Heart Association (AHA).  In my opinion, AHA recommendations (36 grams for males and 25 grams for females) are still too high. Why?  The reason is metabolic disruption.  High blood glucose inhibits AMPK activity (3, 4).  It is AMPK that accelerates the burning of stored fat and reduces insulin resistance.  If AMPK is inhibited, you become fat and diabetic. 

Artificial Sweeteners and Gut Health

Fructose is a little different since it is highly metabolized in the liver to generate uric acid, which can accelerate the development of insulin resistance (5).  It is insulin resistance that makes you fat and diabetic. 

Why Allulose Is Different

Bottom line: the more sugar you consume, the more you disrupt your metabolism.  Artificial sweeteners have a different set of problems, such as altering the microbes in the gut (6).  

That’s why allulose stands out.  It is sweet.  It’s natural.  And it helps your metabolism instead of disrupting it.

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Frequently Asked Questions

What is allulose?

Allulose is a naturally occurring rare sugar found in small amounts in foods like figs and raisins. It tastes similar to sugar but provides almost no usable calories because the body does not metabolize it efficiently.

Does allulose help with weight loss?

Research suggests that allulose may help support weight loss by activating AMPK and increasing GLP-1, which can enhance fat burning and reduce hunger.

How is allulose different from regular sugar?

Regular sugar (sucrose) is broken down into glucose and fructose, which raise blood sugar and can contribute to insulin resistance. Allulose is absorbed but rapidly excreted before it can be used as energy or stored as fat.

Is allulose better than artificial sweeteners?

Allulose may be preferable because it is a natural sugar and does not appear to significantly disrupt gut microbiota, which has been a concern with some artificial sweeteners.

Does allulose raise blood sugar?

Allulose has minimal impact on blood glucose levels because it is not metabolized for energy in the same way as traditional sugars.

References

• 1.  Lee GH et al. D-allulose ameliorates adiposity through the AMPK-SIRT1-PGC-1α pathway in HFD-induced SD rats. Food Nutr Res. 65: 0.29219/fnr.v65.7803 (2021)  doi: 10.29219/fnr.v65.7803. 
• 2. Cayabyab KB et al. The metabolic and endocrine effects of a 12-week allulose-rich diet. Nutrients. 16:1821 (2024). doi: 10.3390/nu16121821. PMID: 38931176; PMCID: PMC11207032.
• 3. Coughlan KA et al. Nutrient excess in AMPK downregulation and insulin resistance.  J Endocrinol Diabetes Obes. 1:1008 (2013)
• 4. Jiang P et al.  Negative regulation of AMPK signaling by high glucose via E3 ubiquitin ligase MG53.  Molecular Cell 81:629-637 (2021)  doi.org/10.1016/j.molcel.2020.12.008.
• 5. Johnson RJ et al.  Sugar, uric acid, and the etiology of diabetes and obesity. Diabetes 62: 3307–3315 (2013).  doi.org/10.2337/db12-1814 
• 6.  Meenatchi M, Vellapandian C.  Exploring the long-term effect of artificial sweeteners on metabolic health. Cureus 16:e70043 (2024). doi: 10.7759/cureus.70043.