
Diet Pepsi is a diet carbonated cola soft drink produced by PepsiCo and introduced in 1964 as a sugar-free variant of Pepsi. The drink was first test-marketed in the United States under the name Patio in 1963 and was rebranded and launched nationally as Diet Pepsi the following year. The ingredients of Diet Pepsi vary depending on the country of origin, but typically include carbonated water, caramel colour, phosphoric acid, caffeine, citric acid, and artificial sweeteners such as aspartame and acesulfame potassium. In 2020, PepsiCo announced that it would be removing aspartame from Diet Pepsi due to health concerns, but the ingredient was later reintroduced.
| Characteristics | Values |
|---|---|
| Introduced | 1964 |
| Packaging | Glass bottles, cans, plastic bottles |
| Type | Diet carbonated cola soft drink |
| Calories | Zero calories |
| Ingredients | Carbonated water, caramel color, phosphoric acid, aspartame, sodium benzoate, acesulfame potassium, citric acid, caffeine, natural flavor |
| Sweeteners | Aspartame, Acesulfame Potassium |
| Variants | Wild cherry, vanilla, lemon, lime, caffeine-free |
| Competitors | Tab, Diet Coke |
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What You'll Learn

Diet Pepsi ingredients
Diet Pepsi is a zero-calorie, carbonated soft drink. It was introduced in 1964 as a sugar-free variant of Pepsi. The ingredients in Diet Pepsi vary slightly depending on the country of origin. In the US, the ingredients are listed as carbonated water, caramel colour, aspartame, phosphoric acid, potassium benzoate, caffeine, citric acid, natural flavour, acesulfame potassium, and phenylketonurics. In Canada, the ingredients are similar, but sodium benzoate replaces potassium benzoate, and dimethylpolysiloxane is also included. In the UK, the drink is listed as containing carbonated water, caramel colour (E150d), flavourings (including caffeine), phosphoric acid, sweeteners (aspartame and acesulfame K), an acidity regulator (sodium citrate), a preservative (sodium benzoate), citric acid, and a source of phenylalanine.
Aspartame is an artificial sweetener commonly found in many diet and sugar-free drinks. In 2020, PepsiCo announced that Diet Pepsi would no longer contain aspartame, but this decision was reversed after sales flopped. In 2012, it was announced that Diet Pepsi would be changing its sweetener to sucralose, which is considered safe for consumers.
Citric acid is another ingredient in Diet Pepsi that may be genetically engineered or derived from GE crops. The other ingredients, such as carbonated water, phosphoric acid, caffeine, and sodium benzoate, are typical of many soft drinks and help to create the carbonated, cola taste that Diet Pepsi is known for.
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Diet Pepsi packaging
Diet Pepsi is a diet carbonated cola soft drink produced by PepsiCo. It was introduced in 1964 as a sugar-free variant of Pepsi. Diet Pepsi is currently stylised in all caps as PEPSI DIET.
When it was first introduced, Diet Pepsi was packaged in glass bottles and cans. In 1994, Diet Pepsi became the first product to list a "freshness date" on each individual can and bottle, a practice that later became a standard in the packaged food and beverage industry. As of 2020, Diet Pepsi is distributed in plastic bottles, cans, and glass bottles, as well as via soda fountains in retail operations such as restaurants and convenience stores.
The logo used in the packaging and advertisement of Diet Pepsi has changed multiple times since its launch. In 2008, PepsiCo announced a redesign of its logo and a re-branding of 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.
The availability and brand identification of Diet Pepsi flavour variants vary by country. In the United States, Diet Pepsi is marketed as having zero calories, as FDA guidelines allow products with fewer than five calories per serving to be labelled as containing "zero calories". In Australia, the caffeine-free version of Diet Pepsi is known as Pepsi Light Caffeine Free and is only available in 1.25-litre bottles.
In May 2020, PepsiCo announced that Diet Pepsi would no longer contain the artificial sweetener aspartame. This was a significant move as it positioned Diet Pepsi as a different option compared to other diet colas, notably Diet Coke, which still contains aspartame.
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Diet Pepsi distribution
Diet Pepsi is distributed in a variety of packaging formats, including plastic bottles, cans, and glass bottles. It is also available through soda fountains in retail outlets such as restaurants and convenience stores. The distribution methods and packaging formats have evolved over time, adapting to changing consumer preferences and market trends.
When Diet Pepsi was first introduced in 1964, it was packaged in glass bottles and cans. This marked a significant innovation in the soft drink industry, as Diet Pepsi became the first diet cola to be distributed on a national scale in the United States. The ability to reach consumers across the country was a pivotal factor in its success.
In 1994, Diet Pepsi made a significant contribution to the packaged food and beverage industry by introducing "freshness dating." They became the first product to list a "freshness date" or expiration date on each individual can and bottle, providing consumers with transparency around shelf life and assuring them of the product's superior taste and quality. This practice was soon adopted as a standard across the industry.
Over the years, Diet Pepsi has expanded its distribution beyond the United States. In 1983, it entered the United Kingdom market, where it is also known as Pepsi Diet. Subsequently, it has been introduced in various countries worldwide, including Italy, Czechia, Poland, Argentina, Spain, Greece, Turkey, Russia, Ukraine, and Brazil. In some of these countries, the beverage is marketed as Pepsi Light to distinguish it from the regular Pepsi cola.
The distribution of Diet Pepsi is closely associated with its parent company, PepsiCo, which has played a pivotal role in its global expansion. PepsiCo's robust distribution capabilities and innovative marketing campaigns have contributed to the widespread availability of Diet Pepsi. The company has also been proactive in adapting to changing consumer preferences, such as the shift towards low-calorie options, and has introduced various flavour variants to cater to diverse tastes and markets.
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Diet Pepsi flavours
Diet Pepsi is a diet carbonated cola soft drink produced by PepsiCo and introduced in 1964 as a sugar-free variant of Pepsi. Over the years, additional variations of Diet Pepsi have been introduced, with different flavours added to the cola base. These include wild cherry, vanilla, lemon, and lime. A caffeine-free version of Diet Pepsi is also available in some countries, such as Australia, where it is known as Pepsi Light Caffeine Free and has a gold label.
The ingredients of Diet Pepsi vary slightly depending on the country of origin. In the United States, the ingredients include carbonated water, caramel colour, aspartame, phosphoric acid, potassium benzoate, caffeine, citric acid, natural flavour, and acesulfame potassium. However, in 2020, PepsiCo announced that it would be removing aspartame from Diet Pepsi, positioning it as a different option from other diet colas like Diet Coke, which still contains aspartame.
In Canada, the ingredients list for Diet Pepsi includes carbonated water, caramel colour, phosphoric acid, aspartame, sodium benzoate, caffeine, flavour, acesulfame potassium, citric acid, and dimethylpolysiloxane. Meanwhile, in the United Kingdom, the drink is made with carbonated water, caramel colour, flavourings (including caffeine), phosphoric acid, sweeteners (aspartame and acesulfame K), acidity regulator (sodium citrate), preservative (sodium benzoate), and citric acid.
The availability and brand identification of Diet Pepsi flavour variants vary by country. For example, in Australia and New Zealand, Pepsi Light was sold for a short time, and since 2021, Pepsi Mango has been available. In Guam, Thailand, Malaysia, Singapore, and the Philippines, Pepsi Ice, a variation with an icy mint flavour, is sold. Limited-edition flavours are also sometimes released, such as the apple-flavoured Pepsi Ice sold in the Czech Republic and Slovakia during the summer of 2007.
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Diet Pepsi sweeteners
Diet Pepsi is a zero-calorie drink, sweetened by artificial means. The primary sweetener used in Diet Pepsi has been aspartame, an artificial sweetener found in many diet and sugar-free drinks. Aspartame is also known by the brand name Equal.
Aspartame has been a controversial ingredient, with some consumers voicing concerns about possible health risks. In 2020, PepsiCo announced that it would no longer use aspartame in its products, including Diet Pepsi, Caffeine-Free Diet Pepsi, and Wild Cherry Diet Pepsi. The company stated that the decision was made in response to consumer demand for an aspartame-free option. This change positioned Diet Pepsi as a unique offering in the market, as its primary competitor, Diet Coke, continued to use aspartame.
However, this was not the first time PepsiCo had removed and then reintroduced aspartame. About eight years prior to the 2020 announcement, the company had removed aspartame due to similar health concerns, only to reintroduce it a year later. The sales during the period without aspartame were poor, which may have influenced the decision to bring it back.
In 2012, ahead of a major rebranding, PepsiCo announced that it would be replacing aspartame with sucralose, another artificial sweetener. This change was also in response to consumer concerns about the safety of aspartame. Sucralose has been deemed safe for consumption by scientific communities, and its use in Diet Pepsi gave consumers a choice between two distinct artificial sweeteners when selecting a diet cola.
In addition to aspartame and sucralose, Diet Pepsi also contains acesulfame potassium, another low-calorie sweetener. Acesulfame potassium is often used in combination with other sweeteners and is designed to impart a sweet taste without the calories or glucose effects of sugar. However, it is worth noting that the impact of these low-calorie sweeteners on overall calorie intake, weight loss, or health improvement is not yet fully understood.
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Frequently asked questions
Diet Pepsi is a diet carbonated cola soft drink produced by PepsiCo. It was introduced in 1964 as a variant of Pepsi with no sugar.
The ingredients in Diet Pepsi vary depending on the country of origin. In the US, the ingredients are: carbonated water, caramel colour, aspartame, phosphoric acid, potassium benzoate, caffeine, citric acid, natural flavour, acesulfame potassium, and phenylketonurics. In 2020, PepsiCo announced that it would no longer use the artificial sweetener aspartame in Diet Pepsi.
When it was first introduced in 1964, Diet Pepsi was packaged in glass bottles and cans. As of 2020, it is distributed in plastic bottles, cans, and glass bottles, as well as via soda fountains in retail operations such as restaurants and convenience stores.










































