
Regular soda is typically a mixture of carbonated water and sweeteners, such as high-fructose corn syrup or sucrose, phosphoric acid, natural flavors, and caffeine. Diet soda, on the other hand, uses sugar substitutes like aspartame, acesulfame potassium, sucralose, and stevia. While diet sodas have fewer or no calories, they are not necessarily healthier than regular soda due to the potential health risks associated with artificial sweeteners. For example, common ingredients in diet sodas like Diet Pepsi, Pepsi Zero Sugar, and Coca-Cola Light include citric acid, malic acid, and phosphoric acid, which can contribute to tooth enamel erosion. Additionally, the choice between regular or diet soda depends on various factors such as taste preference, frequency of consumption, body weight, and dietary habits.
| Characteristics | Values |
|---|---|
| Sugar content | Regular Pepsi contains 10-11 teaspoons of sugar per 12-ounce can. Diet Pepsi contains no sugar. |
| Calories | Regular Pepsi is high in calories. Diet Pepsi is low or zero-calorie. |
| Sweeteners | Regular Pepsi contains sweeteners like high-fructose corn syrup or sucrose. Diet Pepsi contains artificial sweeteners like aspartame, acesulfame potassium, cyclamates, saccharin, or sucralose. |
| Other ingredients | Both Regular and Diet Pepsi contain carbonated water, phosphoric acid, caffeine, and "natural flavors." Diet Pepsi also contains preservatives like potassium benzoate and caramel color. |
| Health considerations | Regular Pepsi contributes to daily sugar and calorie intake. Diet Pepsi may negatively impact weight loss efforts and is linked to potential cancer risk due to artificial sweeteners. |
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What You'll Learn

Diet Pepsi's ingredients
Diet Pepsi is a sugar-free and calorie-free drink. Its ingredients include:
- Carbonated water
- Caramel colour
- Aspartame
- Phosphoric acid
- Potassium benzoate (preserves freshness)
- Caffeine
- Citric acid
- Natural flavour
- Acesulfame potassium
Aspartame and acesulfame potassium are low-calorie sweeteners that are designed to impart a sweet taste without the calories or glucose effects of sugar. However, there is insufficient evidence that they reduce overall calorie intake, aid with weight loss, or improve overall health.
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Pepsi Zero Sugar's ingredients
Pepsi Zero Sugar is a zero-calorie, sugar-free cola drink. It contains carbonated water, caramel colour, phosphoric acid, aspartame, natural flavour, potassium benzoate (preserves freshness), acesulfame potassium, caffeine, citric acid, and calcium disodium EDTA (to protect flavour).
Aspartame and acesulfame potassium are low-calorie sweeteners designed to impart a sweet taste without the calories or glucose effects of sugar. However, there is insufficient evidence that these sugar substitutes reduce overall calorie intake, aid with weight loss, or improve overall health.
Acesulfame potassium is not present in Diet Pepsi, which instead uses it as the primary sweetener. Conversely, Diet Pepsi contains the sweetener acesulfame potassium, which is absent from Pepsi Zero Sugar.
In late 2022, Pepsi Zero Sugar underwent a recipe change, reducing its caffeine content from 69 milligrams to 36 milligrams per 355 mL, matching the amount in Diet Pepsi. This change also removed ginseng and tweaked the sweetener system.
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Health concerns with artificial sweeteners
Artificial sweeteners are sugar substitutes that provide high sweetening power with low calories. They are often used as healthier alternatives to sugar-sweetened products to curb the obesity epidemic. However, the evidence supporting their use for weight reduction or weight maintenance has been inconclusive. While artificial sweeteners may be a good option for people with diabetes or prediabetes as they do not cause sudden increases in blood glucose, they have been associated with a number of health issues, including weight gain, obesity, high blood pressure, metabolic syndrome, and an elevated body mass index.
The long-term effects of artificial sweeteners on the body are still being studied, but artificial sweeteners have been shown to impact various functions of the gastrointestinal system. They have also been associated with neurologic symptoms such as headaches and taste alteration. Additionally, recent studies have established a link between artificial sweeteners and cardiovascular risk and type 2 diabetes. The World Health Organization (WHO) recommends against using non-nutritive sweeteners for weight control and diet-related non-communicable diseases.
It is important to note that most sugar substitutes are considered "non-nutritive," meaning they offer little to no energy when consumed. While decreasing sugar intake can be beneficial, it is recommended to do so by choosing unsweetened products or foods with naturally occurring sugars, such as fruit.
When it comes to Pepsi, both Diet Pepsi and Pepsi Zero contain artificial sweeteners such as aspartame and acesulfame potassium. These products are marketed as low-calorie alternatives to regular Pepsi, which contains a significant amount of sugar. While choosing a diet soda over regular soda can have benefits, most healthcare providers would not recommend drinking diet sodas regularly.
In conclusion, while artificial sweeteners may be a helpful tool for those looking to reduce their sugar intake, they should be consumed in moderation and with caution. More research is needed to fully understand the long-term effects of artificial sweeteners on the body, and they may not be the healthy alternative to sugar that many people believe them to be.
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Health benefits of reduced sugar intake
While regular Pepsi and Diet Pepsi both contain sugar substitutes, regular Pepsi contains more sugar.
Reducing your sugar intake has many health benefits. Firstly, it can help to maintain a healthy weight. High-sugar foods are often high in calories, which can lead to weight gain. A high-sugar diet can also cause erratic energy levels due to the sugar spikes and crashes throughout the day, leaving you feeling tired and irritable.
Secondly, reducing sugar intake can improve your dental health. Sugar can cause tooth decay and even lead to gum disease, which is linked to an increased risk of serious health conditions such as diabetes, heart disease, heart attack, stroke, and cancer.
Thirdly, cutting down on sugar can improve your skin health. A high-sugar diet can damage collagen in the skin through a process called glycation, making your skin appear more aged. It can also cause hormonal imbalances that trigger acne.
Additionally, reducing sugar intake can lower your risk of developing type 2 diabetes. A high-sugar diet can lead to insulin resistance, which is a precursor to prediabetes and type 2 diabetes.
Finally, decreasing sugar intake can help protect your liver. High-fructose drinks and foods can lead to the production of excess fat by the liver, potentially resulting in non-alcoholic fatty liver disease (NAFLD) if left untreated.
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Taste comparison
Regular Pepsi and Diet Pepsi have distinct tastes due to their different ingredients. Regular Pepsi contains carbonated water, sweeteners such as high-fructose corn syrup or sucrose, phosphoric acid, natural flavours, and caffeine. On the other hand, Diet Pepsi contains carbonated water, artificial sweeteners like aspartame, acesulfame potassium, citric acid, phosphoric acid, caffeine, and other additives. The absence of sugar and the use of artificial sweeteners give Diet Pepsi a slightly different taste profile compared to its regular counterpart. Some people may find that Diet Pepsi has a sweeter taste due to the use of artificial sweeteners, while others may notice a more bitter or chemical-like aftertaste associated with these sweeteners.
The choice between regular and diet soda depends on individual taste preferences. While some people prefer the classic taste of regular Pepsi, others may opt for Diet Pepsi if they are looking for a lower-calorie or sugar-free alternative. It's worth noting that the perception of taste can also be influenced by factors such as packaging and branding. Diet Pepsi is typically associated with a silver can, while regular Pepsi is often recognized by its iconic red and blue design. These visual cues can impact consumers' expectations and perceptions of taste, potentially influencing their preference between the two options.
In terms of sweetness, regular Pepsi has a more pronounced sugary taste due to the presence of high-fructose corn syrup or sucrose. Diet Pepsi, on the other hand, uses artificial sweeteners that mimic the taste of sugar without providing the same level of sweetness. The type of artificial sweetener used in Diet Pepsi can also impact its overall taste. For example, aspartame is known for providing a sweet taste with minimal aftertaste, while acesulfame potassium may impart a slightly different flavour profile.
The presence of other ingredients, such as phosphoric acid and caffeine, also contributes to the taste difference between regular and Diet Pepsi. Phosphoric acid adds a sharp, tangy flavour to both versions, but it may be more noticeable in regular Pepsi due to the higher concentration typically found in sugar-containing sodas. Caffeine, on the other hand, provides a mild bitter note that can enhance the overall flavour profile of both beverages.
While taste is a highly subjective matter, some people may find that Diet Pepsi has a slightly milder or less complex flavour compared to regular Pepsi. This perception could be influenced by the absence of sugar and the different types of sweeteners used. However, it's important to note that individual taste buds and preferences will ultimately determine which version is preferred. Some people may prefer the familiar, classic taste of regular Pepsi, while others may appreciate the reduced sweetness or the absence of sugar in Diet Pepsi.
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Frequently asked questions
No, Diet Pepsi does not contain sugar. Instead, it contains artificial sweeteners such as aspartame, acesulfame potassium, and sucralose.
Regular Pepsi is a mixture of carbonated water and sweeteners like high-fructose corn syrup or sucrose, phosphoric acid, natural flavours, and caffeine. Diet Pepsi, on the other hand, uses artificial sweeteners and is often marketed as a low-calorie alternative.
While Diet Pepsi contains no sugar or calories, it is not considered healthier than regular Pepsi due to the potential health risks associated with artificial sweeteners.
Common ingredients in Diet Pepsi, such as citric acid, malic acid, and phosphoric acid, have been linked to tooth enamel erosion. Additionally, the artificial sweetener aspartame has been classified as "possibly carcinogenic to humans" by the World Health Organization.
Yes, taste testers have noted differences in flavour between regular Pepsi and Diet Pepsi. The choice between the two ultimately depends on individual taste preferences.











































