
Caffeine is a naturally occurring substance that is present in many foods and beverages, such as coffee beans, tea leaves, and cocoa beans. It can also be added to some drinks to enhance their flavour. Caffeine is known to provide a bitter taste that balances the sweetness of other ingredients. Many popular sodas in the market contain varying amounts of caffeine, and two of these are Diet Pepsi and Diet Mountain Dew. But which one contains more caffeine?
| Characteristics | Values |
|---|---|
| Diet Pepsi caffeine content | 35 milligrams of caffeine per 12-ounce can |
| Diet Mountain Dew caffeine content | 91 milligrams of caffeine per 20 fluid ounces |
| Mountain Dew Zero Sugar caffeine content | More caffeine than regular Mountain Dew |
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What You'll Learn

Diet Pepsi contains 35mg of caffeine per 12-ounce can
Caffeine is one of the most widely studied ingredients in the food supply. The American Medical Association, the U.S. Food and Drug Administration (FDA), and numerous regulatory agencies worldwide have found that consuming caffeine in moderate amounts is safe for consumers. However, it is always good to be aware of the amount of caffeine you are consuming.
Diet Pepsi contains 35 mg of caffeine per 12-ounce can. This is good news for those who are conscious of their caffeine intake but still want to enjoy a soda. In comparison, Mountain Dew Zero Sugar contains 91 mg of caffeine per 20 fluid ounces, and Mountain Zevia has 55 mg of caffeine per serving.
It is worth noting that the FDA states that most adults can safely consume up to 400 mg of caffeine per day. However, caffeine's impact on individuals can vary, and pregnant women and people sensitive to caffeine should follow the advice of their healthcare provider regarding caffeine intake.
While Diet Pepsi has a lower caffeine content compared to some other sodas, it is important to note that, like most sodas, doctors recommend drinking it only occasionally. This is due to the artificial sweeteners and ingredients added, such as aspartame, which may not be the most nutritious choice.
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Mountain Dew Zero Sugar has more caffeine than Diet Mountain Dew
Mountain Dew Zero Sugar contains more caffeine than Diet Mountain Dew. Caffeine occurs naturally in many plants, including coffee beans, tea leaves, and cocoa beans, and can also be man-made. It is often added to beverages to balance their sweetness with a slightly bitter taste. While caffeine is generally considered safe for consumption, pregnant women and people sensitive to caffeine should consult their healthcare providers regarding their intake.
Mountain Dew Zero Sugar, introduced in 2020, is a modified version of the original Mountain Dew formula, containing no sugar but retaining the same citrus taste and yellow-green color. It contains 20% more caffeine than regular Mountain Dew, with 68 mg per 12 oz can, compared to 54 mg for the Original and Diet varieties. Interestingly, some people attribute their preference for Mountain Dew Zero Sugar over Diet Mountain Dew to this higher caffeine content, as caffeine has a bitter taste that can balance the sweetness of the drink.
On the other hand, Diet Mountain Dew contains 91 mg of caffeine per 20 fluid ounces, which is less than the caffeine content of Mountain Dew Zero Sugar. It is worth noting that the amount of caffeine in Mountain Dew Zero Sugar was similar to that of Pepsi Zero Sugar before its reformulation in 2023. This similarity in caffeine content led to concerns that Mountain Dew Zero Sugar would replace Diet Mountain Dew as the new low-sugar option in the United States. However, a PepsiCo employee confirmed that there were no such plans, and the two flavors would coexist.
While Mountain Dew Zero Sugar and Diet Mountain Dew differ in their caffeine content, both beverages offer a bold citrus refreshment experience. Mountain Dew fans can choose between these two options based on their preference for caffeine and other factors.
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Mountain Dew Zero Sugar has 91mg of caffeine per 20 fluid ounces
Caffeine is a central nervous system stimulant that occurs naturally in coffee beans, tea leaves, kola nuts, cocoa beans, and many other plants. It can also be man-made and is added to some beverages to enhance their flavour and balance their sweetness. Caffeine is one of the most widely studied and consumed ingredients in the food supply, with approximately 85% of adults consuming at least one caffeinated beverage daily.
The amount of caffeine in a drink is an important consideration, as consuming too much can have negative health effects. The US Food and Drug Administration (FDA) advises that most adults can safely consume up to 400 milligrams of caffeine per day. However, the impact of caffeine can vary among individuals, and pregnant women and people sensitive to caffeine should consult their healthcare providers for personalised advice.
When it comes to popular soda brands, the amount of caffeine can vary significantly. For example, Diet Pepsi contains 35 milligrams of caffeine per 12-ounce can, while Mountain Dew Zero Sugar packs a more potent punch with 91 milligrams of caffeine per 20 fluid ounces. That's nearly three times the amount of caffeine in Diet Pepsi!
The higher caffeine content in Mountain Dew Zero Sugar compared to Diet Pepsi may be a strategic choice by the manufacturer, as caffeine is known to enhance certain flavours and balance sweetness in beverages. Additionally, the removal of sugar in zero-sugar variants may provide more room for a higher caffeine concentration.
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Pepsi Max has about 113mg of caffeine per bottle
Caffeine is a central nervous system stimulant that occurs naturally in coffee beans, tea leaves, kola nuts, cocoa beans, and many other plants. It can also be man-made and is added to some beverages to enhance their flavour and balance their sweetness. Pepsi Max, a soft drink with no added sugar, contains about 113 mg of caffeine per bottle. This amount of caffeine is within the safe daily intake levels recommended by the FDA, which advises that most adults can safely consume up to 400 mg of caffeine per day.
The presence of caffeine in Pepsi Max is notable as it contributes to the beverage's stimulating effect on consumers. Caffeine is known for its ability to increase alertness and improve focus, making it a popular ingredient in energy drinks and beverages marketed towards active individuals. The level of caffeine in Pepsi Max is higher compared to some other soft drinks, such as Diet Pepsi, which contains 35 mg of caffeine per 12-ounce can, and Diet Mountain Dew, which has 91 mg of caffeine per 20 fluid ounces.
The higher caffeine content in Pepsi Max may be attributed to its positioning as a beverage catering to individuals seeking an energy boost. The absence of added sugar in Pepsi Max also plays a role, as removing sugar leaves more room for other ingredients, such as caffeine. This can result in a more energizing drink that appeals to health-conscious consumers who want the stimulating effects of caffeine without the added calories from sugar.
While caffeine is generally recognized as safe for consumption, it's important to remember that individual sensitivity to caffeine varies. Some people may be more susceptible to the effects of caffeine, and it's recommended that pregnant women and those sensitive to caffeine consult their healthcare providers for advice on their caffeine intake. As with any caffeinated beverage, consuming Pepsi Max in moderation is advised to avoid potential negative side effects associated with excessive caffeine consumption.
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Mountain Zevia has 55mg of caffeine per serving
Mountain Zevia is a zero-sugar, zero-calorie soda that contains 55 mg of caffeine per 12 oz can. This is comparable to the amount of caffeine in Diet Mountain Dew, which contains 91 mg of caffeine per 20 fluid ounces (or 45.5 mg per 10 fluid ounces). While the caffeine content of Mountain Zevia is slightly higher than that of Diet Mountain Dew, it is important to note that the serving sizes may vary between the two products.
Mountain Zevia is a brand of zero-sugar, zero-calorie soda produced by Zevia. Zevia beverages are sweetened with highly-purified stevia extract and are certified by the Non-GMO Project, Gluten-Free, and Vegan. They do not contain any Erythritol, aspartame, or artificial coloring. In addition to Mountain Zevia, Zevia offers a range of other flavors, including Cherry Cola, Cream Soda, and Grapefruit Citrus, some of which are also caffeinated.
The amount of caffeine in Mountain Zevia and Diet Mountain Dew is relatively low compared to other caffeinated beverages. For example, Pepsi Max (now called Pepsi Zero) previously contained about 113 mg of caffeine per bottle, but the formula was changed to match the caffeine content of Diet Pepsi, which is now similar. Mountain Dew Zero Sugar contains more caffeine than Diet Mountain Dew, and other beverages like coffee and tea typically contain higher amounts of caffeine.
It is worth noting that caffeine sensitivity varies from person to person, and some individuals may be more affected by smaller amounts of caffeine. Pregnant women and people sensitive to caffeine should follow the advice of their healthcare providers regarding caffeine intake. While moderate caffeine consumption is generally considered safe for most consumers, it is always a good idea to be mindful of your total caffeine intake throughout the day.
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Frequently asked questions
Diet Pepsi contains 35 milligrams of caffeine per 12-ounce can, while Diet Mountain Dew contains 91 milligrams of caffeine per 20 fluid ounces. Therefore, Diet Pepsi contains more caffeine per ounce.
No, caffeine does not occur naturally in either drink.
The FDA states that consuming caffeine in moderate amounts is safe for most adults, who can safely consume up to 400 milligrams per day. However, pregnant women and people sensitive to caffeine should follow the advice of their healthcare provider regarding caffeine intake.
Yes, Mountain Dew Zero Sugar contains more caffeine than the regular version.
Yes, Pepsi Zero Sugar, previously known as Pepsi Max, contains more caffeine than regular Pepsi. However, the company has since reduced the caffeine content to lower levels.











































