
Aspartame is a common sweetener in diet sodas, but it has been linked to various health concerns. As a result, some companies have replaced it with other artificial sweeteners like sucralose and acesulfame potassium. In 2005, under pressure from Walmart, Coca-Cola released a version of Diet Coke sweetened with Splenda. This version replaced aspartame with sucralose and acesulfame potassium, providing a no-calorie, great-tasting option for consumers. While this variety had little advertising, it offered a healthier alternative to those concerned about the potential negative effects of aspartame.
| Characteristics | Values |
|---|---|
| Is Splenda used in Diet Coke? | Yes, Diet Coke with Splenda was introduced in 2005. |
| What is Splenda? | It is a sweetener. |
| What is it made of? | Sucralose and acesulfame potassium. |
| What is it used in? | Soft drinks, like Diet Coke. |
| Is it sugar-free? | Yes. |
| Is it calorie-free? | Yes. |
| Is it the same as Diet Coke? | No, it is a different formulation. |
| Is it the same taste as Diet Coke? | Yes, it has the same "beautifully balanced adult cola taste". |
| Is it caffeinated? | It comes in both caffeinated and caffeine-free versions. |
| Is it safe? | The World Health Organization reclassified aspartame as "possibly carcinogenic to humans" with "limited evidence". |
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What You'll Learn

Diet Coke with Splenda was introduced in 2005
In 2005, The Coca-Cola Company introduced a new formulation of Diet Coke, sweetened with Splenda. This was in response to the skyrocketing sales of the sugar substitute, and pressure from Walmart, which was impressed with the over-the-counter popularity of Splenda. The new version replaced aspartame with sucralose and acesulfame potassium.
Diet Coke with Splenda was released as a supplement to the original Diet Coke, rather than a replacement. The Coca-Cola Company had previously used a blend of sweeteners in its Diet Coke, but was forced to switch to 100% aspartame after the manufacturer of NutraSweet warned that the trademark would not be made available for blends.
Diet Coke, first introduced in 1982, is a sugar-free and low-calorie soft drink. It is produced and distributed by the Coca-Cola Company, and was the first new brand since Coca-Cola's creation in 1886 to use the Coca-Cola trademark. The drink is a modified version of the original Coca-Cola formula, containing a low sugar count, but retaining the same cola taste and brown colour. The most commonly distributed version of Diet Coke uses aspartame as a sweetener, although Diet Coke from fountain dispensers still contains some saccharin to extend shelf life.
The Coca-Cola Company has a history of adapting its formula to meet consumer preferences and market trends. In 2004, it introduced Coca-Cola C2, which it claimed tasted much closer to Coca-Cola but with half the carbohydrates. In 2005, the company also introduced Coca-Cola Zero (renamed Coca-Cola Zero Sugar in 2017), a sugar-free formula more closely based on the original Coca-Cola. In 2018, Diet Coke was packaged in a taller, more slender can and introduced four new flavours, targeting millennials.
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Aspartame is 200 times sweeter than sugar
Aspartame is an artificial sweetener that is 200 times sweeter than sugar. It is used as a sugar substitute in many food and drink products, including some diet colas. Diet Coke, for example, uses aspartame as a sweetener, although in 2005, a version of Diet Coke sweetened with Splenda was introduced. This variety, however, received little advertising and promotion and was eventually discontinued by most distributors in 2009.
Aspartame is a popular choice for manufacturers looking to reduce the sugar content of their products without compromising sweetness. It contains calories, but because it is so much sweeter than sugar, less is required to achieve the same level of sweetness. This results in a lower-calorie product, which can be attractive to consumers, particularly those looking to lose weight or manage medical conditions like diabetes.
The use of aspartame as a sweetener is regulated by the FDA, which approved its use in food in 1974 for tabletop sweeteners, chewing gum, cold breakfast cereals, and dry bases for certain foods. Aspartame is composed primarily of two amino acids, phenylalanine and aspartic acid, which are natural constituents of protein-containing foods consumed in any healthful diet. When combined in a specific way, these amino acids produce an intensely sweet-tasting substance.
However, it is important to note that aspartame is not heat stable and loses its sweetness when heated. Therefore, it is not suitable for use in baked goods or other applications that require high temperatures. In such cases, other high-intensity sweeteners like advantame, which is heat stable and 20,000 times sweeter than sugar, may be used instead.
While aspartame is generally recognised as safe for consumption, some people may have phenylketonuria (PKU), a condition that makes it difficult for the body to process phenylalanine, one of the amino acids in aspartame. For this reason, products containing aspartame typically carry a warning label advising individuals with PKU to consult their physician before consuming.
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Aspartame was deemed possibly carcinogenic to humans in 2023
Aspartame, an artificial sweetener commonly used in diet drinks, has been deemed "possibly carcinogenic to humans" by the International Agency for Research on Cancer (IARC) in 2023. This classification, known as Group 2B, indicates limited evidence for carcinogenicity, specifically for liver cancer. It is important to note that the IARC assessment is based on the strength of the evidence rather than the likelihood of causing cancer. While there is limited evidence of a link to liver cancer in humans, there is also limited evidence from animal studies and studies of possible mechanisms.
The World Health Organization (WHO) and the Food and Agriculture Organization (FAO) Joint Expert Committee on Food Additives (JECFA) reaffirmed the acceptable daily intake of 40 mg/kg body weight for aspartame. JECFA concluded that aspartame does not have adverse effects when ingested and is broken down in the gastrointestinal tract into metabolites similar to those found in common foods. They also noted that no mechanism has been identified by which oral exposure to aspartame could induce cancer.
The debate around the safety of aspartame is not new. In 2005, The Coca-Cola Company introduced "Diet Coke sweetened with Splenda" under pressure from retailer Walmart, which was impressed with the popularity of Splenda. This variety replaced aspartame with sucralose and acesulfame potassium. However, by late 2009, most distributors had stopped distributing this version, opting to market Coca-Cola Zero instead.
While the science is still evolving, the American Cancer Society and other organizations have called for more research on aspartame and other artificial sweeteners. The US Food and Drug Administration (FDA) has stated that "scientific evidence has continued to support the FDA's conclusion that aspartame is safe for the general population when made under good manufacturing practices and used under approved conditions." Nonetheless, the potential health risks associated with aspartame consumption continue to be a subject of ongoing investigation and review.
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Diet Coke is not based on the Coca-Cola formula
Diet Coke is a sugar-free and low-calorie soft drink produced and distributed by the Coca-Cola Company. It was unveiled on July 8, 1982, and introduced in the United States a month later. Notably, Diet Coke is not based on the Coca-Cola formula but is instead based on Tab, the Coca-Cola Company's existing diet cola. When diet colas first entered the market, the Coca-Cola Company had a long-standing policy of using the Coca-Cola name only on its flagship cola, so its diet cola was named Tab when it was released in 1963.
The decision to name the drink "Diet Coke" instead of associating it with Coca-Cola was likely influenced by the company's desire to differentiate its flagship product. This strategy also allowed them to market Diet Coke as a unique and distinct brand. Despite not being listed as a Coca-Cola variant on the company's website, Diet Coke quickly overtook Tab in sales, showcasing its popularity.
The introduction of Diet Coke marked a significant shift in the company's branding strategy, as it was the first new brand since Coca-Cola's creation in 1886 to use the Coca-Cola trademark. This decision to associate Diet Coke with the Coca-Cola name, albeit indirectly, was likely influenced by the success of competing sugar-free products, such as Diet Pepsi, which had been launched in 1964.
Over the years, Diet Coke has undergone various formula adjustments and sweetener changes. Initially, Diet Coke was sweetened with aspartame, an artificial sweetener introduced in 1983. However, in 2005, under pressure from Walmart, which was impressed with the popularity of the Splenda sweetener, the company released "Diet Coke sweetened with Splenda." This version replaced aspartame with sucralose and acesulfame potassium. By late 2009, most distributors had stopped distributing the Splenda-formulated Diet Coke, as the company preferred to market Coca-Cola Zero, a sugar-free formula more closely based on the original Coca-Cola.
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Diet Coke is the largest-selling low-calorie soft drink in America
The popularity of Diet Coke can be attributed to its ability to capitalise on the markets of people who require low-sugar regimens, such as diabetics and people concerned with calorie intake. In the UK, a 330 ml can of Diet Coke contains around 1.3 kilocalories (5 kJ) compared to 142 kilocalories (595 kJ) for a regular can of Coca-Cola. This significant difference in calorie content has made Diet Coke a popular choice for those conscious of their calorie intake.
In addition to its low-calorie content, Diet Coke's success can also be attributed to its diverse product offerings and effective marketing strategies. Diet Coke has introduced various flavours over the years, including Ginger Lime, Feisty Cherry, Zesty Blood Orange, Twisted Mango, Blueberry Acai, and Strawberry Guava. These flavour innovations help to meet changing consumer preferences and maintain its position in the market.
Furthermore, Diet Coke's marketing campaigns have been impactful and memorable. For example, in 2014, Diet Coke invited consumers to "Get A Taste" of the good life with a television commercial that asked, "what if life tasted this good?". The campaign encouraged consumers to associate Diet Coke with a positive and indulgent experience.
In 2005, under pressure from retailer Walmart, which was impressed with the popularity of the Splenda sweetener, the Coca-Cola Company released a new formulation called "Diet Coke sweetened with Splenda". This version replaced aspartame with sucralose and acesulfame potassium. However, by late 2009, most distributors had stopped distributing the Splenda-formulated Diet Coke, as the company preferred to market Coca-Cola Zero instead.
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Frequently asked questions
Yes, Splenda is used in Diet Coke. In 2005, Coca-Cola released a new formulation called "Diet Coke sweetened with Splenda". Sucralose and acesulfame potassium replaced aspartame in this version.
While Splenda has been deemed safe for consumption by the U.S. Food and Drug Administration (FDA), some people may choose to avoid it due to health concerns. It is always a good idea to consult a healthcare professional for personalized advice.
Other common artificial sweeteners used in diet colas include aspartame, stevia leaf extract, sucralose, and acesulfame potassium (ace-K). Aspartame, for example, is about 200 times sweeter than table sugar and is widely used in products like Diet Coke.
Artificial sweeteners are used in diet colas to provide a sweet taste without adding sugar and calories. This makes diet colas appealing to those who are conscious of their sugar or calorie intake.
Yes, there are a limited number of options available. For example, Zevia uses stevia leaf extract to sweeten its cola, and Hansen's Diet Sodas use sucralose and ace-K instead of aspartame. These alternatives provide choices for those who wish to avoid certain artificial sweeteners.











































