Official websiteStorage
Storing Oil Supplements for Dogs: Light, Heat, Shelf Life and Your Mighty K9 Bottle
Keep oil supplements closed, in a dark cupboard, at room temperature. The International Olive Council names light as the main threat to olive oil and suggests 55-77 F and using an opened bottle within about 1-3 months. For C60 oil, light matters even more: in a 2021 mouse study, light-exposed oil turned toxic. A Mighty K9 bottle lasts 30 days at one serving a day.
Written by the Mighty K9 editorial teamUpdated · 8 min read
The main threat
What damages an olive oil supplement fastest?
Light. The International Olive Council calls light the main threat to olive oil, ahead of heat and air (IOC, Olive oil storage).
Its storage advice is short: keep the oil in the dark, at 13-25 C (about 55-77 F), tightly closed and away from heat. Once a bottle is open, use it within about 1-3 months (IOC, Olive oil storage).
Mighty K9 is nearly all olive oil, so the same rules apply. The label images show no storage line, which makes it worth setting up good habits on day one. The olive oil page covers what is in the oil itself.
C60 and light
Why does light matter more for C60 oil?
Because light can turn C60 in olive oil toxic. In a 2021 study, C60 oil left in bright light for 4-8 days killed about 25-50% of the mice dosed with it within 14 days (Grohn 2021, mice).
The authors described the toxicity as light-dependent. The study was in mice, not dogs, and the light was bright and constant. Still, it is the clearest reason to keep a C60 product out of the sun. The same study found no lifespan benefit from C60, which our post on C60 research covers in full.
If your bottle sat in sunlight for days, on a windowsill or in a car, do not give it to your dog. Set it aside and call the order desk.
Where to keep it
Where should you store Mighty K9 at home?
A closed kitchen cupboard away from the stove is the best spot in most homes. It is dark, near the dog food and stays at room temperature.
| Spot | Verdict | Why |
|---|---|---|
| Closed cupboard, away from the stove | Best | Dark and steady room temperature |
| Pantry shelf | Good | Dark if the door stays shut |
| Sunny counter or windowsill | Avoid | Direct light, the main threat |
| Shelf above the stove or dishwasher | Avoid | Heat and steam |
| Car, glove box or trunk | Avoid | Heat builds fast, plus sun through windows |
| Fridge | Not mentioned by the brand | Below the IOC range; olive oil can turn cloudy in the cold |
Wherever it goes, keep it out of reach of children and other pets, as the product page warns.
The bottle
Does Mighty K9's amber glass bottle protect the oil?
Tap a number to read each part of the bottle.
- Dropper
Black rubber bulb and glass dropper. The brand's serving calculator counts one full dropper as 1 mL.
- Amber glass
Dark amber glass, a common choice for light-sensitive oils. Still keep it in a cupboard: light is the main threat to olive oil.
- Wordmark
MIGHTY K9, Canine Supplements. Same wordmark as the Guaranteed Analysis panel.
- Label art
A spaniel resting its chin. Decoration, not a claim.
- Organic olive oil
The front says Organic Extra Virgin Olive Oil. The ingredient line says Extra Virgin Olive Oil and names no organic certifier.
- 100% ESS60
Front-panel wording. The Guaranteed Analysis gives the amount: 1.6 mg ESS60 per 2 mL serving.
- Bacon flavor
The taste ingredient. Its source is not listed.
- Net contents
2 fl oz (60 mL): 30 servings of 2 mL. The label prints NET WT, though fluid ounces measure volume.
Amber glass filters out much of the light that harms oil, which is why it is a common choice for oils. It helps, but it is not a vault. A dark cupboard still does most of the work, and the cap needs to go back on tight after each use.
Shelf life
How long does an opened bottle of Mighty K9 last?
About 30 days, which fits well inside the 1-3 month window the IOC suggests for opened olive oil (IOC, Olive oil storage). One 60 mL bottle holds 30 servings of 2 mL, so one serving a day empties it in a month.
If you bought a 3- or 6-bottle pack, leave the spares sealed in the cupboard. Write the opening date on the label of each bottle you start.
A best-by date may be printed on the bottle base, though the supplied images do not show one. Check yours when it arrives. For the daily routine, see how to use Mighty K9.
Try Mighty K9 for 30 days2 mL over one meal a day · money back even on empty bottles · ships from the U.S.
Order nowSpoilage
How can you tell if an oil supplement has gone bad?
Smell it. Fresh olive oil smells green or fruity; old oil can smell stale, waxy or like crayons, which is a sign of rancidity.
- A sharp, stale or paint-like smell under the bacon flavor.
- A clear change in color or clarity compared with when you opened it.
- A bottle that sat in light or heat, even if it smells fine.
- A date on the base that has passed.
Some dogs refuse food with rancid oil on it. If yours suddenly turns away, check the bottle before blaming the dog. Stomach upset and other reactions are covered on the side effects page.
On the road
How do you travel with an oil supplement for your dog?
Pack it in your bag, not the car's hot trunk. Wrap the bottle in a sock or cloth to block light and cushion the glass, and keep it upright in a zip bag in case the dropper leaks.
Never leave the bottle in a parked car on a warm day. If you are away for a few days, a dark drawer in the hotel room works fine. Bring a small cup if your dog eats from a travel bowl, so you can mix the 2 mL in properly.
Old or damaged bottle
What should you do with an old or light-damaged bottle?
Stop using it and keep it until you have the lot number. That number is what FDA asks for in a complaint (FDA, Report a complaint).
Note the codes
Write down the lot number and best-by date from the base. The batch page explains the seller's codes.
Call the order desk
Ring +1 (302) 200-3480 with your order ID. Inside 30 days, the guarantee covers empty bottles too.
Report a reaction
If your dog got sick, call your vet and file with FDA's Safety Reporting Portal, adding the lot number and vet records.
FAQ
Oil supplement storage FAQ
What is the best place to store a Mighty K9 bottle?
Keep the bottle tightly closed in a dark cupboard at room temperature, away from the stove and sunny windows. The label images print no storage line, so follow olive oil advice: dark, about 55-77 F, and finish an opened bottle within a few months.
Should I keep my dog's olive oil supplement in the fridge?
No storage instruction appears on the label images, and olive oil keeps well in a dark cupboard at room temperature. The cold can make olive oil cloudy. If you are unsure, ask the order desk what the brand advises.
Does sunlight ruin C60 oil?
It can. In a 2021 mouse study, C60 oil left in bright light for 4-8 days killed about 25-50% of the mice dosed with it within 14 days. Keep any C60 product in the dark and do not use a bottle that sat in the sun.
How long does olive oil last after opening?
The International Olive Council suggests using opened olive oil within about 1-3 months, stored dark, cool and tightly closed. A Mighty K9 bottle runs out in 30 days at one 2 mL serving a day.
How do I know if my dog's oil supplement is rancid?
Smell it. Rancid oil smells stale, waxy or like crayons instead of fresh and fruity. A change in color or a bottle that sat in heat or light are other warning signs. When in doubt, do not use it.
Can I keep Mighty K9 in the car?
No. Cars heat up fast, and windows let in light, both of which damage olive oil. Carry the bottle in your bag when you travel, wrapped in cloth, and keep it out of a parked car.
Where do I find the lot number on my Mighty K9 bottle?
Lot and best-by details may be printed on the bottle base, though the supplied product images do not show them. Keep the bottle until you have the number, because FDA asks for it in any complaint.
Who wrote this
Written and reviewed by
Plain-language pages built from the label, the sales page and linked veterinary and government sources.
Last updated . Our editorial standards and the way we check reviews are published. This website is run by Gomightyk9, an authorized Mighty K9 shop, not by the manufacturer. We earn money when you buy through our order links.
Keep reading
More about Mighty K9
How to use
Measure 2 mL, drizzle, mix, same meal daily. Plus food types, picky eaters, missed days, travel and storage.
Read more
ESS60 (C60)
The C60 ingredient explained: 1.6 mg per serving, the rat and mouse studies, and why light matters.
Read more
Side effects
Fat, calories, light and the unknowns: every caution for Mighty K9, plus the signs that mean call your vet.
Read moreAuthorized U.S. shop for Mighty K9
Ready to try Mighty K9?
Pick a pack. 2 mL over one meal a day, and every pack covers the full 30-day money-back window, even if the bottle is empty.
- Secure checkout
- 30-day money-back window
- Ships from the U.S. with tracking