RC is an essential oil blend made by Young Living that combines ten individual oils, most of them chosen for their cooling, airway-opening aromas. People primarily use it to promote a feeling of clear, easy breathing during seasonal changes, workouts, or stuffy indoor conditions. It can be diffused, inhaled from steam, or applied topically with a carrier oil.
What’s in the RC Blend
RC contains three types of eucalyptus (globulus, radiata, and citriodora), myrtle, marjoram, pine, lavender, cypress, black spruce, and peppermint. That’s ten oils total, and most of them share a common trait: they’re rich in a natural compound called eucalyptol. Eucalyptol is the molecule that gives eucalyptus its signature sharp, mentholated smell. In lab and clinical research, eucalyptol has demonstrated antimicrobial, antiviral, anti-inflammatory, and mucus-thinning properties. It also acts as a mild bronchodilator, meaning it can help relax the muscles around your airways.
The lavender and marjoram in the blend serve a different role. They’re calming, herbaceous oils that soften the overall scent and add a relaxing quality. Black spruce and pine bring a woody, forest-floor note. The result is a blend that smells brisk and outdoorsy rather than medicinal.
Common Uses
Most people reach for RC in a few specific situations:
- Chest and back rub. Diluted with a carrier oil like coconut or jojoba, RC is massaged onto the chest, upper back, or the soles of the feet. The cooling sensation from the eucalyptus and peppermint creates a feeling similar to a vapor rub.
- Steam inhalation. A few drops added to a bowl of hot water, with a towel draped over the head, lets you breathe the steam directly. This is a popular method when you feel congested or stuffy.
- Diffusing. Adding 3 to 5 drops to a diffuser with about 100 ml of water disperses the aroma throughout a room. Running the diffuser intermittently, rather than continuously for hours, keeps the scent from becoming overwhelming.
- Sinus compress. A warm, damp cloth with a drop or two of diluted RC pressed gently across the bridge of the nose and cheeks.
- Pre-workout or morning refresh. Some users apply it to the chest before exercise or first thing in the morning. The cooling, minty aroma promotes a sensation of deeper breathing and alertness.
How RC Compares to Raven
Young Living also makes a blend called Raven, and the two get confused often. Raven contains only five oils: ravensara, lemon, wintergreen, peppermint, and eucalyptus radiata. It’s a simpler, more concentrated formula. Wintergreen, which is about 99% methyl salicylate, gives Raven a sharper, more intense quality that some users describe as stronger or more penetrating than RC.
RC is generally considered the milder, more versatile option. Its lavender and marjoram make it more pleasant for everyday diffusing, and it’s less likely to cause skin sensitivity. Raven is often chosen when people want something with more intensity, particularly for nighttime use (a drop on a pillowcase, for example). If you’re new to respiratory blends, RC is the easier starting point.
Safety and Dilution
RC should always be diluted with a carrier oil before going on skin. Applying it undiluted can cause irritation, especially on sensitive areas like the face, neck, or chest. A common ratio is one to two drops of RC per teaspoon of carrier oil for adults.
For children, essential oil safety requires extra caution. The Children’s Hospital of Philadelphia recommends limiting aromatherapy to children over age 3, noting that the risks of negative reactions in younger children are too high and clinical research is insufficient. Even for older children, concentrations should be much lower than adult levels, and water-based diffusers running for extended periods can irritate the lungs, eyes, and skin of young children and pets. Keep diffusing sessions short and the room well-ventilated.
None of the oils in RC are known to be phototoxic (the type of skin reaction triggered by sun exposure that citrus oils like bergamot can cause), so sun avoidance after application isn’t a concern with this particular blend. Still, a patch test on a small area of skin is a good practice the first time you use it, since individual sensitivities vary. Essential oils should never be swallowed, even diluted, and bottles should be stored out of reach of children.
What RC Won’t Do
RC promotes a subjective feeling of easier breathing and can make congestion feel less oppressive, but it is not a treatment for asthma, pneumonia, COPD, or any diagnosed respiratory condition. The eucalyptol research is promising, but inhaling a blend from a diffuser delivers far less of the compound than the concentrated doses used in clinical studies. Think of RC as a comfort measure, similar to a menthol chest rub or a steamy shower, not a substitute for medical care when breathing problems are persistent or worsening.