Frankincense oil is most commonly used diluted on the skin for anti-aging and wound healing, diffused for stress relief, or inhaled for respiratory support. The key to using it safely and effectively comes down to proper dilution, choosing the right species for your goal, and storing it correctly to prevent oxidation.
Dilution Basics for Skin Application
Frankincense essential oil should never be applied undiluted to skin. The standard dilution for healthy adult skin is 2 to 3%, which works out to roughly 12 to 18 drops of essential oil per ounce of carrier oil. Good carrier options include jojoba, sweet almond, fractionated coconut oil, or argan oil.
If your skin is sensitive, reactive, or already irritated, drop down to 0.2 to 1%, which is about 1 to 6 drops per ounce of carrier. This lower range also applies to facial applications, since the skin on your face is thinner and more permeable than on your body. For children, many aromatherapists recommend staying at or below 0.5%.
Be cautious with ratio-based instructions you might find online. A recommendation like “1 part essential oil to 4 parts carrier oil” sounds reasonable but actually produces a 25% concentration, which is far too strong for almost any safe use. Always think in percentages rather than ratios to avoid this trap.
Skin Care Applications
Frankincense has genuine skin-healing properties backed by lab research. It boosts fibroblast activity (the cells that build new skin tissue), stimulates collagen production, and promotes the formation of new blood vessels in healing tissue. It also helps skin transition from the inflammatory stage of healing to the rebuilding stage more quickly, which can mean less redness and scarring.
For a daily facial serum, mix 6 to 8 drops of frankincense oil into one ounce of a lightweight carrier like jojoba or rosehip seed oil. Apply a few drops to clean skin morning or evening. Many people use this to target fine lines, uneven skin tone, or dull complexion. For spot treatment on minor scars or blemishes, you can use a slightly higher concentration, around 3%, dabbed onto the specific area with a cotton swab.
To make a body oil for stretch marks or larger scars, blend 15 to 18 drops into an ounce of sweet almond or coconut oil and massage it into the area daily. Consistency matters more than concentration here. Results from topical use build gradually over weeks.
Diffusing for Mood and Breathing
Diffusing is the simplest way to use frankincense. Add 3 to 5 drops to a water-based ultrasonic diffuser and run it for 30 to 60 minutes at a time. The warm, resinous scent is widely used during meditation and yoga because of its calming effect, and it also provides mild respiratory support by helping open airways.
You can blend frankincense with complementary oils in the diffuser. It pairs well with lavender for relaxation, with citrus oils like orange or bergamot for an uplifting blend, or with eucalyptus for stronger respiratory support. A good starting blend is 3 drops frankincense and 2 drops lavender.
For a quick inhalation without a diffuser, place 1 to 2 drops on a tissue or cotton ball and breathe in deeply several times. You can also add a few drops to a bowl of hot water, drape a towel over your head, and inhale the steam for a more concentrated effect during congestion.
Choosing the Right Species
Not all frankincense oils are identical. The three species you’ll encounter most often each have a slightly different profile:
- Boswellia carterii is the most widely available and versatile. It has antimicrobial properties and works well for both skincare and aromatherapy.
- Boswellia sacra is considered a premium variety, prized for skincare, meditation, and immune support. It tends to be more expensive.
- Boswellia serrata has the strongest reputation for anti-inflammatory use, particularly for joint discomfort. It has deep roots in Ayurvedic medicine and is often taken as a supplement (boswellia extract) rather than used as an essential oil.
For general skincare and diffusing, carterii or sacra are your best options. If joint or muscle inflammation is your primary concern, look for serrata, though the resin extract in capsule form delivers boswellic acids more effectively than the essential oil for internal anti-inflammatory effects.
How Frankincense Fights Inflammation
The active compounds in frankincense, called boswellic acids, work by blocking an enzyme called 5-lipoxygenase, which is one of the body’s key drivers of inflammation. They also suppress a signaling pathway that triggers the production of inflammatory proteins like TNF-alpha. This dual action is why frankincense has historically been used for swollen joints, irritated skin, and respiratory inflammation.
When applied topically in a carrier oil, these anti-inflammatory effects are localized to the area where you apply it. This makes diluted frankincense useful for sore muscles, inflamed skin conditions, and minor joint stiffness. Massage the diluted oil into the affected area once or twice daily.
Safety Around Pets
Frankincense is not considered inherently toxic to dogs, but improper use can still cause problems. Undiluted oil, excessive diffuser exposure, or low-quality products can trigger skin irritation, nausea, or lethargy. If you diffuse frankincense at home with dogs, keep the room well-ventilated and make sure your pet can leave the space freely. Avoid diffusing in small, enclosed rooms. Dogs with seizure disorders or known skin sensitivities should not be exposed to frankincense at all without veterinary guidance.
Cats are generally more sensitive to essential oils than dogs due to differences in how their livers process certain compounds. If you have cats, diffuse in short intervals, keep the diffuser in a room the cat doesn’t spend most of its time in, and watch for signs of distress like drooling, coughing, or hiding.
Why You Should Skip Ingestion
Some online sources suggest adding frankincense oil to water or taking it in capsules. This is not well-supported by safety data. While preliminary toxicity research in animal models has not found acute harm at low concentrations, researchers have explicitly noted that the effects of prolonged use in higher organisms still need investigation. Essential oils are highly concentrated, and the digestive tract is more vulnerable to irritation than the skin. The potential risks simply outweigh any proven benefit from swallowing the oil when safer alternatives (like boswellia resin extract supplements, which have more clinical data behind them) exist.
Storage and Shelf Life
Frankincense oil has a shelf life of 1 to 2 years when stored properly. After that, it begins to oxidize, and oxidized essential oils can become skin sensitizers, meaning they’re more likely to cause allergic reactions or irritation. Once an oil has oxidized, it should only be used for household cleaning, not applied to skin.
To get the most life out of your oil, store it in a cool, dark place in a tightly sealed dark glass bottle. The ideal storage temperature is 36 to 40°F, so a dedicated mini fridge works well if you have multiple oils. At minimum, keep bottles away from windowsills, bathrooms, and anywhere that gets warm. Use screw-top caps rather than rubber dropper tops, since the rubber breaks down with prolonged exposure to the oil and can contaminate it. As your bottle empties, transfer the remaining oil to a smaller container to reduce the amount of air trapped inside, which slows oxidation.