Oregano Oil for Cold and Flu: Does It Work?
Oregano oil may contain components with antiviral, anti-inflammatory, and antioxidant properties. However, research has not shown these effects in humans.
Oregano oil may refer to:
Oregano essential oil: This type of oil is more potent and concentrated. You can use it in aromatherapy or mix a few drops with a carrier oil (like jojoba oil) to apply it topically to the skin. Never consume essential oils.
Oil of oregano: This oil is not as strong or concentrated, and a few drops can be added to water or juice and consumed.
Oregano oil supplements: These are usually capsules of oil of oregano that you can consume.
Oregano oil contains several potentially healing compounds, such as:
carvacrol
thymol
terpinene
People have traditionally used oregano oil for respiratory health. It's also become a popular alternative remedy for cold and flu symptoms. This is because it contains compounds that may have antiviral properties. However, most of the research on oregano oil comes from test tube and animal studies rather than studies in humans.
You can find oil of oregano as a soft gel capsule at most health food stores. You may also find oregano oil tinctures, which you can take orally.
You can also buy oregano essential oil as a highly concentrated aromatic, volatile (tending to evaporate) essential oil for external use and aromatherapy.
Keep reading to learn more about the research behind the benefits of oregano oil for cold and flu symptoms and how to use it safely.
Supplements and safety
The FDA doesn't closely monitor supplements and herbs, and issues may arise regarding attributes such as purity, contamination, quality, and strength. It's best to opt for brands that undergo third-party testing to help ensure the supplement contains what the label says it does. It's always wise to talk with your healthcare professional before using any herb, essential oil, or supplement.
What are the benefits of oregano oil when sick?
Several recent studies have examined the possible health benefits of oregano herbal oil, and the findings are promising but not conclusive.
A 2017 study found that oregano essential oil, especially from the leaves of the oregano plant, has strong antioxidant properties. The researchers noted the traditional use of oregano oil in treating fevers and respiratory symptoms, which are both associated with the cold and flu.
According to a 2020 review, oregano essential oil can inhibit certain human and animal viruses in test tube studies. These include:
The researchers noted that this action is likely due to carvacrol, one of the main compounds in oregano oil. While carvacrol may be more effective against certain viruses on its own, oregano oil is more effective against respiratory viruses, such as flu viruses.
However, this research is based on studies done in test tubes and on animals. It isn't yet clear whether it may have these benefits in humans. The human body is more complex, and other variables may contribute.
Is oregano oil safe?
Oregano oil is generally safe, but it can have some possible side effects.
Avoid using oregano oil if you're allergic to mint, sage, basil, or lavender. You may also be allergic to oregano if you're allergic to any of these.
Do not use oregano oil if you're pregnant or nursing, and talk with a pediatrician before using it on a child.
Don't take oregano oil if you have a bleeding disorder or are on any medications that alter blood clotting.
Even if you don't have an allergy, taking oregano oil may cause:
nausea
vomiting
diarrhea
stomach problems
fatigue
increased bleeding
muscle pain
vertigo
headache
difficulty swallowing
excessive saliva
How do I use oregano oil?
There are several ways to use oregano oil.
You can take oregano oil supplements in capsule form orally or consume an oil of oregano tincture, a specific blend formulated for oral use. For both, carefully follow the dosage instructions on the bottle.
If you are using the pure essential oil form, remember never to ingest essential oils. Instead, follow these steps:
add a few drops to a steam diffuser or bowl of hot water
apply to your skin after adding a few drops to a carrier oil, such as coconut oil
Oregano oil is a powerful substance, so it's best to start with the smallest possible dose to see how your body reacts. Once you see how your body responds, you can slowly increase your intake.
You should not take more than the recommended amount listed on the package. Also, remember that recommended dosages can vary between manufacturers.
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