
Diet Pepsi is a diet cola produced by PepsiCo. It is a sugar-free, low-calorie alternative to regular Pepsi, with a lighter, crisper taste. It is made with artificial sweeteners like sucralose and acesulfame potassium, Carbonated water, Caramel Color, Phosphoric acid, Artificial and natural flavors, Caffeine, Sodium benzoate, and Sodium citrate among other ingredients.
It is available in cans, bottles, and vending machines and has been marketed with slogans such as “You’ve got the right one, baby” and “Light, crisp, refreshing.” Diet Pepsi also has a caffeine-free version. It competes with other diet colas such as Coca-Cola’s Diet Coke and Dr. Pepper’s Diet Dr. Pepper in the marketplace.
Diet Pepsi contains about 35 milligrams of caffeine per 12-ounce (355-milliliter) serving, which is similar to the amount of caffeine found in other cola beverages. The caffeine content may vary slightly depending on the country and specific production run.
For comparison, a 12-ounce serving of Coca-Cola Classic contains about 35 milligrams of caffeine, while a 12-ounce serving of Mountain Dew contains about 54 milligrams of caffeine. It’s worth noting that some people are more sensitive to caffeine than others, so the effects of caffeine can vary from person to person. If you’re sensitive to caffeine, it’s best to consume it in moderation or avoid it altogether.
Does Diet Pepsi have caffeine?
Yes, Diet Pepsi contains 35mg of caffeine per 12 fl oz can and 2.92mg of caffeine per fl oz (9.86mg per 100ml).
Serving size | Caffeine Amount | Caffeine strength |
---|---|---|
100ml | 9.9 mg | LOW |
8 fl oz can | 23.3 mg | LOW |
12 fl oz can | 35 mg | LOW |
How Much Caffeine is in Diet Pepsi?
- Caffeine Amount: 35 mg
- Caffeine strength: LOW
- Calories: 0 kcal
- Serving size: 12 fl oz can
Diet Pepsi was originally sweetened with Aspartame and Ace K. After people weren’t happy with it, it was changed to sucralose. However this change didn’t work out either, and the original formula was brought back.
Caffeine in Flavors of Diet Pepsi
Diet Pepsi offers a bold, crisp flavor. With zero sugar and zero calories, you can feel good while bringing your taste buds to new heights — again and again. All flavors of Diet Pepsi have the same caffeine level (except for Diet Pepsi Caffeine Free).
- Diet Pepsi: 35 mg per 12 fl oz
- Diet Pepsi Vanilla: 38 mg per 12 fl oz
- Diet Pepsi Wild Cherry: 38 mg per 12 fl oz
- Diet Pepsi Lime: 38 mg per 12 fl oz
- Diet Pepsi Caffeine Free: 0 mg caffeine

Compare caffeine in Diet Pepsi Vs. other Pepsi Products
Pepsi Variations | Caffeine |
---|---|
Diet Pepsi | 35mg |
Pepsi | 38mg |
Pepsi Caffeine Free | 0mg |
Pepsi Zero Sugar | 69mg |
Pepsi Max | 42.6mg |
Diet Wild Cherry Pepsi | 38mg |
Diet Pepsi vs. Pepsi
Serving Size | Caffeine | |
---|---|---|
Diet Pepsi | 12 fl oz | 36.7mg |
Pepsi | 12 fl oz | 38.9mg |
Diet Pepsi vs. Diet Coke
Comparison | Serving Size | Caffeine |
---|---|---|
Diet Pepsi: | 12 fl oz | 36.7mg |
Diet Coke: | 12 fl oz | 46mg |
Diet Pepsi vs. Coffee
Comparison | Serving Size | Caffeine |
---|---|---|
Diet Pepsi: | 12 fl oz | 36.7mg |
Coffee: | 12 fl oz | 95mg |

Diet Pepsi vs. Pepsi Zero
Comparison | Serving Size | Caffeine |
---|---|---|
Diet Pepsi: | 12 fl oz | 36.7mg |
Pepsi Zero: | 12 fl oz | 69mg |
Diet Pepsi vs. Arizona Diet Green Tea
Comparison | Serving Size | Caffeine |
---|---|---|
Diet Pepsi: | 12 fl oz | 36.7mg |
Arizona Diet Green Tea: | 12 fl oz | 15mg |
Review
Diet Pepsi is a sugar-free, low-calorie alternative to regular Pepsi, available in a variety of packaging sizes and flavor options, with a caffeine level similar to other colas. It also has changed the sweetener from time to time due to public concerns about safety.
Ingredients:
- Carbonated water
- Caramel color
- Phosphoric acid
- Artificial and natural flavors
- Caffeine
- Sodium benzoate
- Sucralose and Acesulfame potassium
- Sodium citrate
- Caffeine
- Glycerol ester of rosin
- Sodium benzoate
- Caramel color
- aspartame (discontinued in some markets)
Calories:
Diet Pepsi contains 0 calories and 0 grams of sugar per 12-ounce (355-milliliter) serving.
Flavor:
Diet Pepsi is marketed as having a lighter, crisper taste than regular Pepsi. The drink is also sold in a caffeine-free version.
Availability:
Diet Pepsi is widely available in the United States and other countries and can be found in grocery stores, convenience stores, and vending machines.
Marketing:
Diet Pepsi has been marketed over the years with various slogans, such as “You’ve got the right one, baby” and “Light, crisp, refreshing.” The brand has also used celebrities in its advertising campaigns, including Michael Jackson, Madonna, and Cindy Crawford.
Comparison to another diet cola:
Diet Pepsi competes with other diet colas such as Coca-Cola’s Diet Coke and Dr. Pepper’s Diet Dr. Pepper in the marketplace.
Packaging:
Diet Pepsi is primarily sold in 12-ounce (355-milliliter) cans and bottles but is also available in 2-liter bottles, 20-ounce bottles, and 12-pack cans.
Discontinued versions:
Diet Pepsi has had several discontinued versions over the years, such as Diet Pepsi Jazz (flavored with either black cherry and french vanilla or strawberried lime), Diet Pepsi Max (containing ginseng and more caffeine), Diet Pepsi Lime and Diet Pepsi Vanilla, which was reintroduced in 2020.
Sweeteners:
Diet Pepsi originally used saccharin as a sweetener but switched to aspartame in the early 1980s. In 2015, Diet Pepsi was reformulated to replace aspartame with a blend of sucralose and acesulfame potassium. This reformulation was done in response to consumer concerns about the safety of aspartame.
FAQs
According to PepsiCo, Diet Pepsi is gluten-free and is not made with any gluten-containing ingredients. However, it is made in facilities where gluten-containing products are also produced, so there is a risk of cross-contamination. People with gluten sensitivities or celiac disease should exercise their own judgment in consuming Diet Pepsi.
Diet Pepsi is a sugar-free beverage, which means it should be safe for diabetics to consume in moderation as part of a balanced diet. However, it is always best for diabetics to consult with their healthcare provider for personalized advice.
Diet Pepsi contains about 35 milligrams of caffeine per 12-ounce (355-milliliter) serving, which is similar to the amount of caffeine found in other cola beverages.
Moderate caffeine consumption during pregnancy (less than 200mg per day) is considered safe by most healthcare professionals. However, it is always best for pregnant women to consult with their healthcare provider for personalized advice on caffeine consumption.
In 2015, Diet Pepsi was reformulated to replace aspartame with a blend of sucralose and acesulfame potassium. This reformulation was done in response to consumer concerns about the safety of aspartame.
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