THE SCIENCE

The science behind the chew

How a rare sugar activates the same satiety pathways as GLP-1 drugs — naturally, through food.

THE INGREDIENT

What is allulose

Allulose (D-allulose) is a rare sugar found naturally in small quantities in figs, raisins, jackfruit, and maple syrup. It tastes like sugar — because it is one — but your body metabolizes it completely differently.

Unlike glucose or fructose, roughly 70% of ingested allulose is absorbed and then excreted unchanged by the kidneys. It provides approximately 0.4 calories per gram (compared to 4 cal/g for table sugar) and has virtually zero glycemic impact.

The FDA has recognized allulose as Generally Recognized as Safe (GRAS), and it is excluded from total and added sugars on US nutrition labels.

0.4 Calories per gram (vs 4 for sugar)
0 Glycemic impact
GRAS FDA recognized as Generally Recognized as Safe
70% Excreted without metabolic conversion
THE MECHANISM

How allulose works in your body

Three metabolic pathways. One after-dinner chew.

1

GLP-1 secretion

When you consume allulose, it stimulates L-cells in your lower intestine to release GLP-1 (glucagon-like peptide-1) — the same satiety hormone targeted by drugs like Ozempic and Wegovy. GLP-1 signals your brain to reduce appetite and slow gastric emptying, creating a natural sense of fullness.

2

Hepatic glycogen synthesis

Allulose activates glucokinase in the liver, promoting the conversion of blood glucose into glycogen (stored energy). This has a dual benefit: it helps maintain stable blood sugar levels after meals and signals your body that energy stores are adequate — reducing the metabolic drive to seek more food.

3

Blood glucose regulation

Unlike regular sugars, allulose actually helps attenuate postprandial (post-meal) blood glucose spikes. Clinical studies show that co-ingestion of allulose with a meal significantly reduces the glycemic response — preventing the insulin spike and subsequent crash that drives late-night hunger.

4

Vagal afferent activation

Research published in Nature Communications demonstrates that allulose's GLP-1 release activates the vagus nerve pathway — a direct gut-brain communication channel. This isn't just hormonal signaling; it's a neural circuit that physically communicates satiety from your gut to your brain.

THE COMPARISON

Same pathway. Different approach.

GLP-1 receptor agonists like semaglutide (Ozempic) have proven the power of GLP-1 for appetite control. Allulose activates the same pathway — through food.

Allulose (Nightcap)
GLP-1 Drugs
Mechanism
Triggers natural GLP-1 release via gut L-cells
Synthetic GLP-1 receptor agonist via injection
Administration
Eaten as food (chew)
Weekly subcutaneous injection
Prescription
No prescription needed
Prescription required
Monthly cost
~$39/month
$800–$1,350/month
Side effects
Minimal (mild GI at high doses)
Nausea, vomiting, pancreatitis risk
FDA status
GRAS (food ingredient)
FDA-approved pharmaceutical
Effect magnitude
Moderate, targeted appetite support
Strong systemic appetite suppression
Muscle preservation
No muscle loss concerns
Documented lean mass loss

This comparison is for educational purposes. Nightcap is a food product, not a pharmaceutical. Consult your healthcare provider about GLP-1 medications.

THE RESEARCH

Published, peer-reviewed, and replicated

The metabolic effects of allulose are backed by clinical research published in leading journals.

GLP-1 release and vagal afferent activation mediate the beneficial metabolic and chronotherapeutic effects of D-allulose

Nature Communications2018

Oral D-allulose triggers GLP-1 release in the gut and activates vagal nerve pathways, reducing food intake and improving glucose tolerance. The study established the GLP-1/vagal pathway as the primary mechanism for allulose's appetite-suppressing effects.

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Effects of D-allulose on glucose tolerance and insulin response to a standard oral sucrose load

BMJ Open Diabetes Research & Care2021

Human clinical trial demonstrating that co-ingestion of D-allulose with sucrose produced a dose-dependent reduction in postprandial blood glucose, significantly blunting the glycemic spike from sugar-containing meals.

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A Preliminary Study for Evaluating the Dose-Dependent Effect of d-Allulose for Fat Mass Reduction in Adult Humans

Nutrients2018

12-week randomized, double-blind, placebo-controlled human trial showing D-allulose supplementation significantly decreased body fat percentage and body fat mass in a dose-dependent manner.

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Rare sugar D-allulose: Potential role and therapeutic monitoring in maintaining obesity and type 2 diabetes mellitus

Pharmacology & Therapeutics2015

Comprehensive review detailing allulose's metabolic mechanisms: glucokinase activation for glycogen synthesis, suppression of lipogenic enzymes, and inhibition of intestinal glucose transporters.

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90-Day repeated oral toxicity test of D-allulose

Regulatory Toxicology and Pharmacology2019

Safety study establishing a no-observed-adverse-effect level (NOAEL) of 5,000 mg/kg/day, supporting D-allulose's safety classification and FDA GRAS recognition.

Read study
THE FORMULATION

Why a chew. Why after dinner. Why this simple.

We spent months testing formats — powders, capsules, drinks, gummies. The chew won, and not just because of taste. Every design decision serves a specific behavioral and metabolic purpose.

Chew format

A chew feels like a treat, not a task. It satisfies the oral fixation component of after-dinner cravings while delivering allulose through the GI tract for GLP-1 activation.

After-dinner timing

Allulose is most effective when consumed near a meal. After dinner is the precise behavioral inflection point where cravings begin — so we designed the product for that exact moment.

Single-ingredient focus

No proprietary blends. No 27-ingredient supplement panels. Allulose is the active intervention — everything else in the formula serves taste and texture. Transparency by design.

Caramel flavor

The flavor is deliberately indulgent. Nightcap should feel like you're closing the day with something satisfying — not swallowing a health food. The ritual matters as much as the molecule.

READY TO TRY IT

Experience it yourself

The science is clear. The mechanism is proven. The only question left is whether it works for your evening — and we think it will.