Russ WareAnyone who has been vaping for a while has probably come across an old bottle of e-liquid tucked away and forgotten in the back of a drawer or cupboard. Maybe they’ve run out of their usual juice and are tempted to dig it out, only to pause and wonder how long it’s been sitting there and whether it’s still safe to use.
Indeed, you might assume most vapers would check before using any bottle of vape juice, but that isn’t necessarily the case. A recent consumer survey in the UK found that more than 50% of vapers never check for an expiration date before filling their vape tank or pod, while over 35% aren’t even sure whether e-liquids have one in the first place.
So, does e-liquid actually go off, and how long can you expect a bottle to last? The answers start with something surprisingly simple: whether vape juice even has an expiration date.
- Reputable e-liquid brands will always include an expiry date or a bottled-on date on the packaging of their products. In most regions where vaping is legal, regulations will require them to do so. Dates can most reliably be found on the bottom of the box or bottle.
- The different ingredients in vape juice stay good for different lengths of time, so there is no single measurement of how long a juice will be shelf-stable. The specific ratios of each ingredient in a bottle can either shorten or extend its usable lifespan.
- Common signs that a bottle of e-liquid is nearing expiry include darkening color, an overly sweet, bitter, or stale flavor, an unusual smell, specks or clumps of unknown material suspended in the liquid, and the ingredients visibly separating in the bottle.
- E-liquid shelf life and ingredient stability can be helped by storing vape juice correctly. Keep bottles at room temperature, in a dark drawer or cupboard away from sunlight, and with the bottle cap screwed on tightly. Keep disposable vapes sealed until ready to use.
Does Vape Juice Have an Expiration Date?
If you buy your e-liquids in small volumes, enough to last you a week or two, you may well fall into that category of people who have never asked the question. But it does, and that makes sense; this is a mixture of organic and non-organic elements after all. Anything we put into or onto our bodies – food, drinks, medicines, and even cosmetics – will normally have an expiry date, so why would vape juice be any different?
Most reputable e-liquid brands will include an expiry date (sometimes called the P.O.D. date) on the outer packaging (where there is any) and printed on the bottle itself. This is usually on the bottom, and often so small it is hard to read, but there if you look closely enough. Some brands use a “Bottled On” date instead, and leave working out the probable expiration date to the user.
After reading through guidance from several e-liquid brands, and checking the dates on numerous bottles that I had lying around, the consensus seems to be that e-liquids should remain good for between 12 and 24 months after being bottled. That’s obviously quite a wide range, suggesting that variables such as ingredient ratios, manufacturing process, liquid volume, packaging, and more may affect the true expiration date of any individual bottle.
Note: Some vape packaging, mainly on disposable vapes, includes a reminder to use within 14 days or so of opening. This is likely less about the e-liquid expiring in that time, and more about providing the optimal experience. However, because the juice in disposables is permanently open to the air once opened, it not only loses efficacy more rapidly than juice stored in sealed bottles, but it is also more exposed to potential contamination. Rule of thumb: keep disposables sealed until ready to use.
How Long Do E-liquid Ingredients Last?
Most e-liquids contain several ingredients: Propylene Glycol (PG), Vegetable Glycerin (VG), freebase or salt nicotine, and various flavorings. Each of these ingredients may expire at a different rate than the others. Therefore, how quickly or slowly a mixed e-liquid expires can often be down to the ratio of its ingredients. So, what is the average shelf life of each?
| E-liquid Ingredient | Expected Shelf Life | Properties and Degradation |
|---|---|---|
| Propylene Glycol (PG) | 24 to 36 Months | Stable, synthetic chemical that can act as a mild preservative for the other ingredients. High PG liquids tend to last longest. |
| Vegetable Glycerin (VG) | 12 to 24 Months | Derived from plant oils. Less stable than PG, and more prone to separate if not stored properly. High VG liquids can expire relatively quickly. |
| Nicotine | 12 to 24 Months | Nicotine starts oxidizing from the moment it is added to vape juice, reacting strongly to oxygen, sunlight, and heat. Loses potency and darkens over time. |
| Flavorings | Around 12 Months | Flavoring ingredients are usually food-grade concentrates. As such, the flavor is almost always the first thing to suffer in an expiring e-liquid. |
Signs Your E-liquid is Expiring
There is rarely one clear sign that your bottle of vape juice is nearing the end of its usable life, but rather a combination of things you can see, smell, and taste. These signs include:
Darkened Color
More noticeable in clear liquids than in colored ones, darkening is a sure sign of nicotine oxidation. Some vapers swear that steeping (deliberately exposing vape liquid to air in a dark cupboard) e-liquid until it starts to darken enhances flavor, but it is also worth remembering that oxidation is the nicotine breaking down and will result in less potency and potentially less craving satisfaction.
Loss or Change of Flavor
E-liquid flavor can change in a number of ways when it is close to expiring. It may get sweeter as the components break down and release sugars. Or it may become bitter (nicotine degradation), start to taste stale or weak, or simply taste wrong in some undefinable way. Aside from color change, a change in taste is one of the first signs that your e-liquid is past its best.
Bacterial Growth/Clumping
Normally caused by the naturally derived ingredients (VG and flavorings) going, for want of a better word, moldy. Tiny amounts are unlikely to be truly harmful, but this is definitely a sign that your juice has expired. Can be the cause of the stale flavor mentioned above. If you see bacterial growth, it is worth ditching the juice and starting a new bottle to be on the safe side.
Strange or Unusual Smell
A strange smell, either in the liquid itself or in the vapor produced, often precedes or accompanies bacterial growth. If you notice an odd smell, pay attention to how the liquid looks. If you can stand the smell, your e-liquid is unlikely to be harmful at this point, but throwing it out is the sensible option.
Ingredient Separation
The various ingredients in e-liquid have different densities and molecular weights. They naturally want to separate but, in a freshly mixed bottle, are held together by emulsifiers. If your liquid looks obviously separated, give it a good shake to recombine the ingredients first. If the separation recurs quickly, or the juice looks cloudy, that is a sure sign that the bottle is not at its best and could expire soon.
Is Expired E-liquid Safe to Use?
The good news is that using expired vape juice is unlikely to be unsafe for your long-term health. Constantly using expired juices probably isn’t a good idea, and there have been some reports of expired liquids causing minor health complaints in rare instances, but using the occasional bottle that isn’t in tip-top condition shouldn’t be a major issue. Possible, but uncommon, side effects include:
- Throat Irritation
- Coughing
- Sore Throat
- Nausea
- Headache
- Stomach Upset
Studies have repeatedly found vaping to be less harmful to health than smoking, but it is still important to vape responsibly and take care of what you are putting into your body. While the health risks of using expired e-liquid are likely small, it is better to waste a few dollars of suspect juice than to take the chance of causing (even temporary) unpleasant effects.
How to Store Your Vape Liquid for Longevity
Knowing how to properly store your vape liquid, particularly if you tend to buy in bulk, can help extend its lifespan to at least the suggested average and perhaps even beyond.
- Keep bottles in their boxes (if they come in boxes) and store them in a cool, dark place. Excessive heat and direct sunlight are the biggest problems for vape juice longevity.
- Unless steeping, keep the bottle cap screwed on tightly to prevent unwanted oxidation. Leave disposable vapes sealed in their airtight bags until ready to begin using them.
- If you have a big collection of e-liquids, keep the oldest at the front so you use it before selecting more recently purchased supplies.
- Even better, don’t buy more than you can easily use within 6-12 months to ensure it all stays in good condition.
- Avoid storing e-liquids in the fridge or freezer. The idea that this keeps it fresh is unproven at best. Indeed, the cold is more likely to cause crystallization and separation.
The Bottom Line
E-liquids can expire, just like anything else we put into our bodies, but knowing when to use a bottle and when to err on the side of caution is usually quite easy. Reputable vape juice brands will always include an expiry or bottled-on date for their products, so avoiding expired e-liquid is usually as easy as reading the packaging. Ultimately, taking a few puffs of expired juice isn’t going to do any real harm, and so avoiding an out-of-date bottle is more about ensuring that your vaping experience remains enjoyable and satisfying.
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