
Diet Pepsi is a sugar-free variant of Pepsi, introduced in 1964 and marketed as a low- or no-calorie beverage. It is currently stylised as PEPSI DIET and is also known as Pepsi Light in several countries. Diet Pepsi's ingredients vary slightly depending on the country of origin, but generally, it contains carbonated water, caramel colour, phosphoric acid, aspartame, potassium benzoate, caffeine, citric acid, and acesulfame potassium as a sweetener. The drink has undergone several rebrandings and is now distributed worldwide in plastic bottles, cans, and glass bottles, as well as through soda fountains in retail outlets.
| Characteristics | Values |
|---|---|
| Sugar Content | No sugar |
| Calories | Low- or no-calorie beverage |
| Ingredients | Carbonated water, caramel color, aspartame, phosphoric acid, potassium benzoate, caffeine, citric acid, acesulfame potassium, natural flavor |
| Variations | Wild cherry, vanilla, lemon, lime, caffeine-free |
| Packaging | Plastic bottles, cans, glass bottles, soda fountains |
| Taste | Less smooth and rich than Pepsi Zero |
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What You'll Learn

Diet Pepsi contains no sugar
Diet Pepsi is a zero-calorie, no-sugar drink. It was introduced in 1964 as a no-sugar variant of Pepsi and was the first diet cola to be distributed on a national scale in the United States. Diet Pepsi is also known as Pepsi Light in some countries.
The drink is a carbonated soft drink and is packaged in plastic bottles, cans, and glass bottles, as well as being available from soda fountains. The ingredients vary slightly depending on the country of origin, but all ingredient lists for Diet Pepsi do not include sugar. In the US, the ingredients are listed as carbonated water, caramel color, aspartame, phosphoric acid, potassium benzoate, caffeine, citric acid, natural flavor, and acesulfame potassium. In Canada, the ingredients list also does not include sugar, instead containing carbonated water, caramel color, phosphoric acid, aspartame, sodium benzoate, caffeine, flavor, acesulfame potassium, citric acid, and dimethylpolysiloxane.
In the UK, the drink is known as Pepsi Diet or Pepsi Light and the ingredients are listed as carbonated water, caramel color, phosphoric acid, sweeteners (aspartame and acesulfame K), flavorings (including caffeine), acidity regulator (sodium citrate), preservative (sodium benzoate), and citric acid. The availability and brand identification of Diet Pepsi flavor variants vary by country.
Diet Pepsi is a popular drink, with the United States being its largest single market. As of 2010, Diet Pepsi represented a 5.3% share of all carbonated soft drink sales in the US, and was ranked as the seventh soft drink brand by volume.
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Pepsi Zero Sugar is a different product
Pepsi Zero Sugar and Diet Pepsi are indeed different products. While both are low- or no-calorie beverages, they have slightly different ingredients and tastes. Both drinks contain carbonated water, caramel colour, phosphoric acid, caffeine, and citric acid. However, the ingredients are not listed in the same order, and Diet Pepsi contains the sweetener acesulfame potassium, which is absent from Pepsi Zero Sugar. On the other hand, Pepsi Zero Sugar contains calcium disodium EDTA, a food additive for preserving flavour, colour, and texture, which is not present in Diet Pepsi.
The two drinks also differ in their packaging. Pepsi Zero Sugar comes in a black can, while Diet Pepsi comes in a silver can. The words "Zero Sugar" on the Pepsi Zero Sugar can are quite small, which can make it easy to mistake it for regular Pepsi. However, the sugar version of Pepsi comes in a bright blue can, making it easily distinguishable.
In terms of taste, some people prefer Pepsi Zero Sugar, describing it as smoother, richer, and more thirst-quenching. Diet Pepsi is also described as not terrible, indicating that it still has a pleasant taste, but some may prefer the flavour of Pepsi Zero Sugar.
The availability of these drinks may also vary depending on the country. For example, in Australia, the caffeine-free version of Diet Pepsi is known as Pepsi Light Caffeine Free and has a gold label. In other countries, such as Italy, Czechia, Poland, Argentina, Spain, Greece, Turkey, Russia, Ukraine, and Brazil, Diet Pepsi is also referred to as Pepsi Light.
In conclusion, while both Pepsi Zero Sugar and Diet Pepsi are no-calorie beverage options, they differ in their specific ingredients, packaging, taste, and availability in certain regions. These differences make Pepsi Zero Sugar a distinct product from Diet Pepsi, offering consumers a choice between two similar yet slightly varied options.
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Diet Pepsi's ingredients vary by country
Diet Pepsi, introduced in 1964, was the first diet cola to be distributed on a national scale in the United States. It is a no-calorie carbonated cola soft drink produced by PepsiCo as a sugar-free variant of Pepsi. While the U.S. represents the largest single market for Diet Pepsi, it is now available worldwide.
The ingredients of Diet Pepsi vary in some cases by the country of origin. For example, in Australia, a caffeine-free variant of Diet Pepsi is sold under the name Pepsi Light Caffeine Free. Its ingredients are listed as carbonated water, caramel colour, phosphoric acid, aspartame, sodium benzoate, acesulfame potassium, flavour (natural), and citric acid. In other countries, Diet Pepsi also lists the sweetener acesulfame potassium, while Pepsi Zero does not. Instead, Pepsi Zero contains calcium disodium EDTA, a food additive that is not found in Diet Pepsi.
The sweetener used in Diet Pepsi has changed over the years. Initially, the artificial sweetener saccharin was used, but concerns about its safety prompted a shift to aspartame in 1983. In 2012, it was announced that Diet Pepsi would change its sweetener to sucralose, but in 2015, the company reverted to using aspartame due to customer feedback.
In addition to the classic Diet Pepsi, PepsiCo also produces other low-calorie colas, such as Pepsi Max and Pepsi Zero Sugar, which have slightly different ingredients and tastes.
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Diet Pepsi's packaging has changed over time
Diet Pepsi has been an early pioneer in the diet soda market for over 60 years, and its packaging has changed significantly over time.
In the early 1960s, Diet Pepsi was formulated with the artificial sweetener saccharin, which was linked to bladder cancer in animal studies during the 1970s. This sparked a shift in sweeteners in the 1980s, with Diet Pepsi adopting aspartame. However, aspartame also faced controversy due to alleged brain tumour risks. In response to these controversies, Diet Pepsi underwent several changes in its ingredients and packaging to maintain its relevance and appeal to consumers.
One significant change in Diet Pepsi's packaging occurred in 1994 when it became the first national beverage brand to print expiration dates directly on aluminium cans, a feature called "freshness dating." This innovation provided transparency to shoppers about the product's shelf life. The company also introduced a 24-can multipack called "The Cube," which was easier to carry and store in the refrigerator.
In the late 1990s, Diet Pepsi's packaging continued to evolve. In 1997, the "Diet" part of the logo was written in red script, and the Pepsi name had a drop shadow. The globe in the logo also increased in size, and the typography became bolder. In 1999, the slogan, "So light, so crisp, so refreshing," was added to emphasise the product's characteristics.
In the early 2000s, Diet Pepsi made several changes to its packaging. In 2003, the "diet" part of the logo was in lowercase print, and the Pepsi globe was shifted down. In 2008 and 2009, PepsiCo overhauled Diet Pepsi's visual branding, transforming its logo into a minimalist, lower-case stylized design. These changes kept the brand feeling fresh and modern.
In 2010, Diet Pepsi introduced the "smile" globe logo, replacing the previous "grin" globe. The company also discontinued Diet Pepsi Lime and Diet Pepsi Vanilla during this time. In 2016, an individual Diet Pepsi with aspartame, called the "Classic Sweetener Blend," was released with a teal background and the 2002 typography. However, it was discontinued in late 2017.
In 2018, Diet Pepsi introduced "retro labels," featuring the grey background with the 1986 can design and the "Classic Diet Pepsi Taste, Retro Design" caption. This retro edition was released in various pack sizes, including 12-packs, 24-packs, and 2-liter bottles.
Throughout its history, Diet Pepsi has continuously adapted its packaging to stay current with shifting consumer tastes and trends. These changes have played a pivotal role in maintaining the brand's strong perception and presence in the market.
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Diet Pepsi has different flavours
Diet Pepsi is a sugar-free variant of Pepsi that was introduced in 1964. It is a diet carbonated cola soft drink produced by PepsiCo. Over the years, PepsiCo has introduced several different flavours of Diet Pepsi. These include wild cherry, vanilla, lemon, and lime. A caffeine-free version of Diet Pepsi is also available, which is known as Pepsi Light Caffeine Free in Australia. This variant has a gold label and is only available in 1.25-litre bottles.
In addition to the classic Diet Pepsi, PepsiCo also produces other low-calorie colas, such as Pepsi Max and Pepsi Zero Sugar. Pepsi Zero Sugar, also known as Pepsi Zero, has a slightly different ingredient list compared to Diet Pepsi. For example, Pepsi Zero contains calcium disodium EDTA, a food additive used to preserve flavour, colour, and texture, while Diet Pepsi does not. The two drinks also differ in taste, with some people preferring the smoother and richer flavour of Pepsi Zero.
The availability and brand identification of Diet Pepsi flavour variants vary by country. For example, in the Czech Republic and Slovakia, Pepsi Ice is a limited edition cola with apple flavour, while in Australia and New Zealand, Pepsi Mango has been available since 2021.
The logo and packaging of Diet Pepsi have also changed multiple times since its original iteration. In 2008, PepsiCo redesigned its logo and rebranded many of its products, including Diet Pepsi. The brand's blue and red Pepsi Globe logo became a series of "smiles," with the central white band arcing at different angles depending on the product.
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Frequently asked questions
No, Diet Pepsi is a low- or no-calorie beverage with no sugar.
The ingredients in Diet Pepsi vary slightly depending on the country of origin. In the US, the ingredients are: carbonated water, caramel color, aspartame, phosphoric acid, potassium benzoate, caffeine, citric acid, natural flavor, and acesulfame potassium.
Both Diet Pepsi and Pepsi Zero Sugar are low-calorie beverages, but they have slightly different ingredients and tastes. Diet Pepsi contains the sweetener acesulfame potassium, while Pepsi Zero Sugar uses other artificial sweeteners.
Diet Pepsi was introduced in 1964 as a variant of Pepsi with no sugar. It was first test-marketed in 1963 under the name Patio Diet Cola and was rebranded as Diet Pepsi the following year.










































