Does Mountain Dew Go Unhealthy or Expire? Get The Information
A lone can of Mountain Dew (labeled Mtn Dew on many cabinets) has a manner of outliving everybody’s reminiscence of shopping for it. It turns up behind a pantry shelf, beneath a automotive seat, or on the backside of a cooler from a celebration two summers in the past. The date is pale, the can is heat, and the one query is whether or not it’s nonetheless price opening. Usually it’s, so long as the container is undamaged. The caveats are largely about taste.
Does Mountain Dew go dangerous?
The quick reply: Not like milk, deli meat, or leftovers. A sealed, undamaged can or bottle of Mountain Dew typically doesn’t grow to be unsafe simply because the printed date has handed, since USDA treats that date on shelf-stable meals as a top quality marker. The drink is acidic and preserved, which makes it a poor place for micro organism to develop, so the standard adjustments are misplaced fizz and a duller citrus taste. Broken packaging or lengthy warmth publicity adjustments the image, and Food regimen Dew’s aspartame can fade in warmth.
For an entire pantry storage reference, see our Food Storage Guide.
📋 Does Mountain Dew Go Unhealthy: At a Look
| Sealed can or bottle previous the date | Per USDA, ought to nonetheless be secure if dealt with correctly till spoilage is clear; fizz and taste fade |
| Food regimen Mountain Dew and Zero Sugar | Similar security image, however aspartame can fade sooner in warmth |
| Opened, refrigerated, cap on | Finest fizz inside a day or two; discard if disregarded for a very long time |
| Storage | Cool, away from temperature extremes; USDA says beneath 85°F is greatest for shelf-stable meals |
| Bulging, leaking, or closely rusted container | Discard with out opening, regardless of the date says |
| Caffeine (12 fl oz) | 54 mg in Mountain Dew and Food regimen Mountain Dew, per PepsiCo |
Key Takeaways
- Mountain Dew’s acid is citric acid, and its label lists preservatives, so a sealed container is a poor setting for bacterial development.
- The date stamped on a can is the maker’s estimate of peak taste, and USDA says dates aren’t an indicator of a product’s security.
- Warmth is the storage situation to keep away from. For shelf-stable meals generally, USDA says beneath 85°F is greatest.
- An opened bottle or can loses fizz first, and acidity isn’t a assure of security as soon as the drink has been open for a very long time.
- Cans from earlier than 2020 might record brominated vegetable oil (BVO), which FDA has since banned from meals. Present Mountain Dew doesn’t.
- A 12 fl ozcan has 54 mg of caffeine, greater than the 34 mg Coca-Cola lists for a Coke.
Why Mountain Dew Doesn’t Spoil Like Most Meals
Perishable meals goes dangerous as a result of micro organism and molds discover moisture, vitamins, and a cushty pH. Mountain Dew has loads of sugar, however additionally it is an acidic drink. A College of Florida extension publication on processing acidified and low-acid foods notes that C. botulinum spores received’t germinate and develop in meals with a pH of 4.6 or beneath. A 2016 survey of 379 U.S. drinks within the Journal of the American Dental Association discovered that 93 p.c had a pH beneath 4.0, properly beneath that line. The survey wasn’t particular to Dew, but it surely exhibits how acidic most packaged drinks are.
That’s the overall image, and it’s why a forgotten can is normally a taste query slightly than a food-poisoning one. It isn’t a promise about each can in each situation.
Citric Acid, Not Phosphoric: How Dew Differs From Cola
Cola will get its tartness from phosphoric acid. Mountain Dew’s ingredient record as an alternative exhibits citric acid, and PepsiCo’s vitamin web page for a 12 fl ozcan lists 0 mg of phosphorus. The label additionally lists sodium benzoate and erythorbic acid, each labeled “preserves freshness,” and calcium disodium EDTA “to guard taste.” Acid and preservatives collectively assist clarify why a sealed can is shelf-stable.
What the Printed Date Is Actually Telling You
The date on a can or bottle of Mountain Dew is a producer’s estimate of when the drink tastes its greatest. That’s why it’s there: USDA says producers present courting “to assist shoppers and retailers resolve when meals is of highest quality.” USDA’s guidance on shelf-stable food factors the identical manner. On its product dating page, USDA says that aside from toddler system, dates “are usually not an indicator of the product’s security and are usually not required by Federal regulation.” It additionally says a product that passes its date at house “ought to nonetheless be secure and healthful if dealt with correctly till the time spoilage is clear.”
We couldn’t discover a PepsiCo assertion on how gone the date Mountain Dew stays at its greatest. PepsiCo’s personal product pages be aware that formulation and packaging can change. So deal with the date as a taste information. If you happen to’re sorting a cupboard of outdated items, our information to expired pantry staples exhibits which losses are about high quality and that are about security.
Food regimen Mountain Dew and Zero Sugar
Common Mountain Dew is sweetened with high-fructose corn syrup. PepsiCo’s web page for Diet Mountain Dew lists a distinct set: aspartame, acesulfame potassium, and sucralose. Of these, aspartame is the one whose stability in carbonated drinks we might supply. The FDA’s 1983 rule approving aspartame for carbonated beverages describes producer research through which stability “drops off markedly” at temperatures above 86°F. The identical doc says that though the misplaced stability “may lead to a touch acceptable product, it will not result in an unsafe product.”
We couldn’t discover a revealed check of how Food regimen Mountain Dew’s full sweetener mix ages, so deal with the warmth warning as a wise precaution slightly than a measured end result. Virtually, a food regimen soda that has spent a protracted stretch someplace scorching is extra more likely to style skinny or much less candy than one saved cool. Mountain Dew Zero Sugar is a separate product with its personal label, so examine the can for what it accommodates.
Scorching Vehicles, Garages, and Heat Cabinets
Warmth is the storage issue that issues. USDA’s shelf-stable steerage recommends maintaining such meals in a cool, dry place and says temperatures beneath 85°F are greatest. It warns that temperatures over 100°F are dangerous to canned items, and that steerage is written for canned and shelf-stable meals generally, not Mountain Dew particularly. We couldn’t discover PepsiCo steerage on daylight itself, however a spot in direct solar is a heat spot, so the identical recommendation applies.
As a result of Dew is acidic and preserved, a sealed can that sat by means of a scorching summer time is extra more likely to style off than to be unsafe. Two issues are price doing anyway. Verify the container for bulges, leaks, and rust earlier than consuming. And chill the can earlier than opening it, as a result of heat soda holds much less dissolved carbon dioxide and foams over extra simply.
After You Open It
As soon as the seal breaks, carbonation begins to depart. A bottle with the cap screwed on tight holds its fizz higher than an open can, so cap a two-liter proper after pouring and hold it chilly, since chilled liquid holds extra dissolved gasoline. Count on the most effective fizz inside a day or two.
Acidity helps, but it surely isn’t a security assure for a drink that has been open, uncovered to air, and probably touched by a mouth. If an opened bottle has been disregarded for a very long time, particularly if it has been drunk from immediately, the most secure alternative is to discard it. Refrigeration helps protect each the fizz and the drink’s high quality.
A spill is its personal downside. On the ingredient record we checked, Yellow 5 is the one colorant, and brilliant, dye-based sodas are the sort that may go away a mark on material. Our information to getting soda stains out of clothes covers the cleanup, together with the dye-based drinks.
A Notice on Previous Cans and BVO
Older formulations of Mountain Dew used brominated vegetable oil, an additive that saved citrus flavoring from floating to the highest of the drink. The FDA revoked its authorization to be used in meals in a rule that took impact August 2, 2024. On its BVO page, the company explains that oral publicity was related to elevated bromine in tissue and that the thyroid is a goal organ of potential detrimental well being results in rodents. Corporations had till August 2, 2025, to reformulate and deplete stock, based on the Federal Register notice.
PepsiCo mentioned in 2014 that it was working to take away BVO from Mountain Dew, and information reviews put it off the ingredient record by about mid-2020. A present can doesn’t include it. An older can might, and the ingredient record will say “brominated vegetable oil.” If you happen to discover one, passing on it’s a affordable name.
Indicators One thing Is Really Unsuitable
- A domed can finish or a tough, swollen bottle: Irregular swelling can point out an issue with the product or container. Depart it sealed and eliminate it.
- A leak, a moist shelf, or a sticky seam: Verify whether or not the container has leaked or been broken. If the seal is compromised, discard it.
- Heavy rust or a rusted seam: USDA says to discard closely rusted cans, although gentle floor rust that wipes off will not be severe.
- Development, clumps, or floating particles: That isn’t atypical growing older. Pour it out.
- An off odor on opening: Don’t depend on your nostril alone; if something appears unsuitable, skip it.
- “Brominated vegetable oil” on the label: Marks an older can made earlier than the additive was dropped.
Regular Modifications That Don’t Imply It’s Unhealthy
- Much less chew and fewer bubbles than a contemporary can, even from a container that was by no means opened.
- A muted citrus taste.
- A watery, much less candy style in a food regimen model that was saved heat.
- Sweat beading on a chilly can or bottle.
A Moonshine Mixer Earlier than It Was a Soda Aisle Staple
Mountain Dew started as a mixer. In keeping with WBIR in Knoxville, brothers Barney and Ally Hartman developed the trendy drink in East Knoxville within the Forties, and historian Jack Neely says they wished a mixer to enhance the style of moonshine. “Mountain dew” was already a nickname for liquor earlier than then. The Hartmans’ group later acquired the Tip Company of Marion, Virginia, which had a high-caffeine citrus drink, and mixed the 2. WBIR reviews that Pepsi purchased the model in 1964.
Loads of individuals nonetheless combine soda with spirits. If you happen to’re pouring Dew right into a drink, our guides as to whether whiskey goes bad, whether or not Jack Daniels goes bad, and whether or not vodka goes bad cowl how lengthy an open bottle of the spirit retains. Basically, an opened bottle of liquor outlasts an opened bottle of soda by a large margin.
For a crowd, the ice-filled bucket in our summer entertaining tips retains cans chilly, and our pizza party tips cowl drink choices for an informal unfold.
How A lot Caffeine Is in Mountain Dew?
PepsiCo’s product pages record 54 mg of caffeine in a 12 fl ozcan of Mountain Dew and 54 mg in Diet Mountain Dew. Coca-Cola’s caffeine FAQ lists 34 mg for a 12-oz.can of Coke and says a 12-oz.cup of espresso has 140 mg or extra. Dew sits between the 2. Flavors and merchandise fluctuate, so examine the web page for the one you’re consuming.
For many adults, the FDA has cited 400 milligrams a day as “an quantity not typically related to detrimental results,” per its caffeine guidance. Our information to how many cups of coffee are safe places that quantity in context. And since Dew is acidic and sugary, our information to eating for healthy teeth is a helpful learn for anybody sipping all of it day.
Fast Storage Reference
- Earlier than opening: Shade, a cool room, and no sun-baked trunks. USDA’s rule of thumb for shelf-stable meals is beneath 85°F.
- After opening: Screw the cap on, put it within the fridge, and purpose to complete it inside a day or two.
- Swollen, leaking, deeply dented, or closely rusted: Bin it regardless of the date says.
- Previous inventory: Scan the label for brominated vegetable oil.
- Empties: Rinse and ship them to recycling; our recycling guide covers cans, glass, and plastic bottles.
| State of affairs | What to Do |
|---|---|
| Unopened can slightly previous the date, saved in a cool pantry | High-quality to drink; the fizz and citrus snap could also be milder. |
| Food regimen Dew from a scorching storage | If the can is undamaged, doubtless secure however probably watery. |
| Cans from a summer-long automotive journey | Examine for swelling, leaks, and heavy rust. If intact, chill earlier than opening. |
| Open two-liter, capped and chilled, two days later | Cheap to drink, however noticeably duller. |
| Open bottle disregarded for a very long time | Discarding it’s the most secure alternative. |
| Swollen, leaking, or closely rusted container | Throw it out unopened. |
| Pre-2020 can that lists BVO | Passing on it’s affordable. |
Does Mountain Dew Go Unhealthy FAQ
Is it secure to drink expired Mountain Dew?
Often. USDA’s place is {that a} product whose date passes at house ought to nonetheless be secure if it was dealt with correctly and exhibits no signal of spoilage. With a sealed, undamaged can, what you’ll largely discover is milder fizz and taste. A can that’s swollen, leaking, or closely rusted is a distinct matter.
See additionally
What’s the shelf lifetime of Mountain Dew after the date?
We couldn’t discover a quantity from PepsiCo. A 2022 UGA Extension article reviews a USDA suggestion of consuming unopened common soda inside 9 months of the date and food regimen soda inside three. That doesn’t seem in USDA’s present courting pages, which describe dates as high quality markers, so learn it as a style window, not a security cutoff.
How lengthy is opened Mountain Dew good for?
Suppose when it comes to fizz. Within the fridge with the cap tight, it holds up for a day or two earlier than going noticeably uninteresting. Acidity isn’t a license to depart it out, so if it has been out for a very long time, discarding it’s the most secure alternative.
What are the indicators Mountain Dew has gone dangerous?
Begin with the packaging: swelling, a leaking or sticky seam, or heavy rust. Then the liquid: development, clumps, or floating bits. An odd odor on opening is another excuse to skip it, although don’t depend on your nostril alone. Plain flatness or a uninteresting taste means it has aged, not spoiled.
Why does outdated Mountain Dew style flat or off?
Dissolved carbon dioxide leaks away over time and sooner as soon as the container is open, and heat speeds taste adjustments. In a food regimen model, aspartame can fade too, which leaves the drink tasting watery.
Does Food regimen Mountain Dew expire sooner?
Not when it comes to security. The priority is taste: the FDA’s aspartame assessment discovered stability dropping markedly above 86°F, so a food regimen Dew that has been saved heat is extra more likely to style off. We couldn’t discover a revealed check of the whole Food regimen Dew sweetener mix.
Is Mountain Dew okay after sitting in a scorching automotive or storage?
Warmth normally hurts taste earlier than it hurts security. USDA’s shelf-stable storage web page places the candy spot beneath 85°F and flags something over 100°F as dangerous to canned items. Verify the container for swelling or leaks, then chill it and open it slowly.
Ought to Mountain Dew be refrigerated?
Not till you open it. Shops promote it unchilled, and a sealed container doesn’t want the fridge. Chilly retains the fizz full of life, which is the primary motive to sit back leftovers.
Can Mountain Dew be frozen?
It could actually, however a can left too lengthy will in all probability cut up or bulge because the liquid expands, and a bottle can crack. Set a timer for a fast chill. If the container swelled, burst, or leaked, throw it away.
Does Mountain Dew nonetheless include BVO?
No. PepsiCo took brominated vegetable oil out of Mountain Dew by about mid-2020, and the present ingredient record doesn’t embody it. FDA’s revocation of its meals use took impact August 2, 2024. Older cans might record it.
Does Mountain Dew have actual orange juice?
Its ingredient record consists of concentrated orange juice, although the label doesn’t say how a lot. We are able to’t inform you how a lot juice is in a can.
How a lot caffeine does Mountain Dew have?
PepsiCo lists 54 mg for a 12 fl ozcan of Mountain Dew and of Food regimen Mountain Dew. Coca-Cola lists 34 mg for a Coke, and it cites 140 mg or extra for a 12-oz.espresso.
The place is the expiration date on a Mountain Dew can or bottle?
Verify the underside of a can, or the neck and cap space of a bottle, for a stamped date. That’s our remark slightly than PepsiCo steerage, and the format can fluctuate by bundle. USDA describes dates like this as high quality markers, not security deadlines.
Does Mountain Dew keep fizzier in a can or a plastic bottle?
Cans and glass typically retain carbonation higher than plastic bottles over lengthy storage. Plastic is barely permeable to carbon dioxide, so the gasoline slowly escapes by means of the bottle wall. A two-liter that has sat for months will normally be flatter than a can of the identical age. The distinction is about fizz, not security.
Do Code Crimson, Baja Blast, and different flavors go dangerous the identical manner?
The identical fundamental logic applies to sealed, intact containers, however flavors differ in substances, sweeteners, and caffeine. PepsiCo’s pages be aware that formulations can change, so go by the label in your can. A product like Mtn Dew Kickstart is a distinct sort of product. PepsiCo lists it as a juice drink with 5% juice, and its Orange Citrus taste at 69 mg of caffeine per 12 fl oz.
Does Mountain Dew nonetheless have Yellow 5?
The ingredient record we checked exhibits Yellow 5 as the one colorant. PepsiCo mentioned in April 2025 that it will pace up a shift to pure colours, and Fast Company reviews it’s exploring purple candy potato and carrots for drinks like Mountain Dew. The corporate has not dedicated to the federal objective of ending petroleum-based dyes by the top of 2026, so formulation can change and the label is the ultimate phrase.
Additional Studying
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