A Lower, Slower Blood Glucose Rise

This is the change people ask about most, including the estimated 537 million adults living with diabetes globally (IDF, 2021) and the much larger population managing pre-diabetes or insulin resistance. Anyone in those groups should lean on their care team for personal advice.

Conventional sugar-sweetened confectionery causes rapid spikes in blood glucose. These spikes trigger a surge of insulin, which often overshoots, causing a glucose crash that leaves you fatigued and craving more sugar. Repeated over years, this cycle is a primary driver of insulin resistance and type 2 diabetes progression.

Polyol-sweetened confectionery behaves fundamentally differently. Because polyols are only partially absorbed in the small intestine, blood glucose rises far more slowly and to a much lesser peak. Isomalt has a glycaemic index of approximately 9. Sorbitol sits at approximately 9. Maltitol, the highest-GI polyol, sits at approximately 35. All are substantially below sucrose at approximately 65.

Research published in PMC found that sugar-free dark chocolate produced a 65 percent lower blood glucose response (measured as incremental area under the curve) compared to conventional dark chocolate in adults with diabetes (PMC8832613).

Fewer Calories From Your Sweet Treats

Added sugar is among the most calorie-dense and nutritionally empty components of the modern diet. A standard milk chocolate bar can deliver 25 to 35 grams of added sugar and over 250 calories, with negligible fibre, vitamins, or protein. Consumed daily, that represents approximately 90,000 calories per year from one snack alone, with no meaningful nutritional return.

A landmark 30-year follow-up study (CARDIA, 2023) tracking over 3,000 adults found that those with the highest added sugar consumption had significantly greater weight gain and a substantially higher risk of obesity compared to those with the lowest intake.

High-sugar diets are specifically associated with visceral fat accumulation around the abdomen. Visceral fat is metabolically active, generating inflammatory hormones that contribute to heart disease, diabetes, and certain cancers. Reducing added sugar intake is one of the most direct, evidence-supported strategies for reducing visceral fat.

Switching to polyol-sweetened confectionery reduces caloric intake from sweet foods by a meaningful margin, without requiring you to stop enjoying them. Polyols deliver roughly 2.4 kcal per gram compared to sucrose's 4 kcal per gram. Erythritol provides virtually zero calories.

Added Sugar and Type 2 Diabetes: What Research Shows

Type 2 diabetes is now one of the fastest-growing global health crises. The IDF estimates that by 2045, over 700 million adults will be living with the condition, with the vast majority of cases being dietary and lifestyle-driven.

The mechanism is well-established. Chronically raised blood sugar forces the pancreas to produce more and more insulin. Over time, cells become progressively resistant to insulin's signals, a condition called insulin resistance. Left unmanaged, this leads to permanently raised blood glucose and a Type 2 diagnosis.

Professor Walter Willett of Harvard T.H. Chan School of Public Health has stated that reductions in added sugar intake can rapidly lower the risk of type 2 diabetes, with measurable improvements possible within days to weeks rather than months.

For individuals already managing pre-diabetes, snack choices are worth discussing with a healthcare professional. On the label side, Sugar Free products contain no more than 0.5g sugars per 100g.

Added Sugar and Heart Health: The Research

The connection between high added sugar consumption and cardiovascular risk is among the most well-evidenced findings in nutritional science. Added sugars raise blood triglycerides, contribute to high blood pressure, increase LDL cholesterol, and promote systemic inflammation, all of which are established cardiovascular risk factors.

A 2014 study published in JAMA Internal Medicine found that people consuming 17 to 21 percent of their calories from added sugar had a 38 percent higher risk of dying from cardiovascular disease compared to those consuming 8 percent or less. The 2023 BMC Medicine analysis found that even incremental increases in added sugar consumption correspond to meaningfully higher stroke and heart disease risk.

Reducing daily added sugar intake from confectionery is one straightforward place to start, and swapping conventional chocolates and biscuits for versions made without added sugar is a simple way to do it.

Added Sugar and Your Skin

The link between sugar and skin health is one of the most consistently surprising findings for people who make the switch. High added sugar consumption drives a process called glycation, in which sugar molecules bind to collagen and elastin proteins in the skin. This makes the skin's structural proteins rigid and less resilient, accelerating the formation of wrinkles, fine lines, and a loss of elasticity.

A 2024 research review confirmed a strong association between dietary sugar intake and acne. Raised blood sugar stimulates insulin production, which in turn triggers increased sebum secretion and accelerated skin cell turnover, two primary mechanisms in acne development. Reducing added sugar intake reduces these hormonal triggers, the review concluded.

Some people who reduce added sugar report visible skin changes within a few weeks, though individual results vary and skin is influenced by many factors beyond diet.

Added Sugar, Mood and Focus: The Research

The brain is highly sensitive to blood glucose fluctuations. When blood sugar spikes and then crashes rapidly, as it does after sugary confectionery, cognitive performance suffers. Studies have linked high added sugar consumption to lower scores on tests of memory, attention, and processing speed. High glucose levels over time have been linked with reduced mental capacity, particularly in people managing diabetes.

A 2024 cross-sectional study published in a peer-reviewed journal linked high dietary sugar intake with increased depression risk among US adults, a finding consistent with earlier research showing sugar-driven neuroinflammation affects mood regulation pathways. A 2022 paper established connections between excess dietary sugar and systemic inflammation that includes the brain.

A lower added sugar diet avoids the sharp rise and fall pattern described above, and snack swaps are one practical way to lower the added sugar in an ordinary day.

Polyols Are Not Sugars

Dental caries is one of the most prevalent non-communicable conditions worldwide. The mechanism is direct: oral bacteria ferment dietary sugars, producing acids that demineralise tooth enamel progressively over time.

Polyols are not sugars. That is the neutral, factual difference between the two ingredient types on a nutrition label, and it is why the sugars line on a Diablo Sugar Free pack reads 0.5g per 100g or less.

If dental health is part of your decision making, your dentist is the right person to advise you. On the label side, the practical fact is simply that polyols are not sugars.

The Afternoon Slump: What Causes It

The energy cycle associated with high-sugar snacking is one of the most disruptive patterns in a modern diet, and one of the least recognised. A sugary biscuit or chocolate bar delivers a rapid glucose surge. The body responds with a corresponding insulin surge to manage it, often overshooting, leaving blood glucose lower than before the snack. The result is the familiar mid-afternoon slump: fatigue, irritability, difficulty concentrating, and an almost irresistible urge for another sugary snack.

This cycle is not inevitable. It is a product of the ingredient, not the snack format itself.

Polyols are absorbed slowly, and eaten instead of sugar they produce a lower and slower blood glucose rise. That is the whole point of the swap: the satisfaction of a sweet snack, minus the added sugar that drives the pattern above.

For fitness enthusiasts, active professionals, and parents managing busy schedules, it is a swap many people notice in how their afternoon feels.

Added Sugar and Inflammation: The Research

Chronic, low-grade inflammation is now understood by researchers to be a common underlying mechanism linking many of the most serious and prevalent modern health conditions: type 2 diabetes, cardiovascular disease, Alzheimer's disease, certain cancers, and clinical depression.

Excess added sugar consumption is a well-established pro-inflammatory dietary factor. It stimulates the production of inflammatory cytokines, drives oxidative stress, and disrupts the composition and diversity of the gut microbiome, all of which contribute to systemic inflammation. A 2022 paper in a leading nutrition journal linked excess dietary sugar consumption to inflammatory markers and tumour promotion pathways.

Reducing daily added sugar does not require elaborate protocols or expensive supplements. One straightforward place to begin is the confectionery eaten daily as a routine habit: swapping it for a version made without added sugar removes one regular source of added sugar from the week.

Added Sugar and Sleep: The Research

The relationship between sugar consumption and sleep is one of the least discussed but most actionable of all the benefits of going sugar free. Research has found that higher added sugar intake is associated with lighter, less restful sleep, greater difficulty falling asleep, and more frequent nighttime waking. A 2016 study found a direct link between higher sugar consumption and more restless sleep patterns.

The mechanism involves blood glucose dynamics. A sugary snack in the evening triggers an insulin surge followed by a glucose dip during the night, which can activate the body's stress response and interrupt the sleep architecture needed for deep, restorative rest. High sugar consumption also affects the availability of tryptophan, a precursor to serotonin and melatonin, the neurotransmitters that regulate sleep timing and depth.

An evening snack with less added sugar is a simple change to trial. If sleep is a concern, the research above is worth reading in full, and your GP is the right person to talk to about persistent sleep problems.