Aromatherapy is popular yet it has a problem: there is no indication for it. Yes, it can make you feel better but this is hardly a true medical indication. I know of many things that make me feel better, and I would not call them a THERAPY! But perhaps this new study from Iran offers a solution for the dilemna:
Sleep plays an essential role in infant development. This randomized clinical trial investigated the effect of aromatherapy with rose water on the deep sleep status of premature infants admitted to a neonatal intensive care unit (NICU).
The study was conducted on 64 infants hospitalized in NICUs. In the intervention group, two drops of rose water were poured on gas and placed next to the babies’ heads. The control group was treated in the same way except that distilled water was employed. The ALS scale was used to assess the sleep status.
Of the 66 infants in this study, 30 were female and 36 were male. The average gestational age of the infants was 32.5 ± 1.99 weeks. The results showed that the amount of deep sleep (type A and B) in the intervention group was significantly higher than the control group during and after the intervention (p=0.001).
The authors concluded that, considering the positive impact of rose water in improve of sleep quality in premature babies; it can be used to improve sleeping condition of infants in hospitals, along with main treatment.
The study has many flaws and it is badly written. Yet, I find it interesting. If its results can be confirmed with a more rigorous trial, aromatherapy might finally find a true medical purpose.
The tales of Kate Moss’s excesses are legendary. Sex and drugs and rock ‘n’ roll have always been an integral part of the supermodel’s life. Stories of wild behavior, random sexual encounters, and copious drug use seemed endless. Now, it seems she is adding a new element to her tumultuous career:
The supermodel is the latest in the long line of VIPs jumping on the quackery bandwagon by marketing her very own brand of over-priced nonsense. She was reported to have worked with Victoria Young, a homeopath and “spiritual guide”, on the products. There’s a Dawn Tea at £20 for 25 tea bags, “inspired by Kate’s English garden” – “With ingredients like hibiscus, rosemary, and nettle leaf, this first step of the Dawn Ritual gently energizes and strengthens the body”. There’s also a Dusk Tea.
There is also a 100ml bottle called Sacred Mist for £120. It is described as “a unique eau de parfum blended with essential oils for the body and surroundings.” There’s a 30ml bottle for £105 called Golden Nectar, which is pro-collagen. CBD oil drops to “holistically support body, mind, and soul”. A 50ml face cream for £95. A 100ml face cleanser for £52.
The website of Moss’ new enterprise claims that “COSMOSS draws on the extraordinary life experience of Kate Moss — someone whose career and image has touched on and influenced so many others and yet has taken her own, rich journey of transformation gradually and privately. COSMOSS is a celebration of every day exactly as it is, with all its imperfections. Each product has been meticulously crafted with wellbeing in mind, using potent, natural substances. Each ritual opens a door to balance, restoration, and love; each fragrance and infusion recentres and completes. COSMOSS is self-care created for life’s modern journeys to make them beautiful, mesmerising and magical.”
In a far cry from her past, Moss explained: “I’ve been meditating, doing yoga, just being much healthier. All the stuff that can make you feel more grounded and balanced.”
Personally, I am glad to hear that Kate is off cocaine and now into other, less harmful ‘natural substances’. Her customers wellbeing might not improve, but I suspect her bank account might.
Two million people in UK are estimated to be currently suffering from long COVID, says the Office for National Statistics. Fatigue continues to be the most common symptom – experienced by 55% of those with self-reported long COVID – followed by 32% with shortness of breath, 23% with a cough, and 23% with muscle ache. The problem is only going to increase in the near future. Thus, many people are frantically looking for an effective therapy. Practitioners of so-called alternative medicine (SCAM) are no exception.
This study aimed to evaluate the potential for inhalation of essential oils to improve energy levels among otherwise healthy female survivors of acute COVID-19 who experience a lack of energy more than five months after recovery.
This was a randomized double-blind, placebo-controlled trial to evaluate the potential for inhalation of Longevity™, a proprietary essential oil blend manufactured by Young Living Essential Oils (Lehi, Utah, USA), on energy levels among female survivors of COVID-19 who continue to experience fatigue more than 5 months recovery from the acute infection. Forty women were randomized to two groups: intervention and placebo. The placebo product contained an inert, odorless fractionated coconut oil. Both groups inhaled the assigned product twice daily for fourteen consecutive days. Fatigue scores were measured using the Multidimensional Fatigue Symptom Inventory (MFSI). Secondary outcomes included scores on each of the MFSI’s ten subscales.
Individuals who inhaled the essential oil blend for 2 weeks had significantly lower fatigue scores after controlling for baseline scores, employment status, BMI, olfactory function, and time since diagnosis, with a large effect size (F (1,39) = 6.15, p = .020, partial eta squared = 0.198). Subscale analysis identified subscales of vigor, as well as global, behavioral, general, and mental fatigue as benefiting from the intervention. This study provides evidence that a proprietary aromatherapy blend can significantly improve energy levels among women who are experiencing fatigue after recovering from COVID-19.
The authors concluded that the use of aromatherapy with Longevity™ essential oil blend to boost energy levels in women who have recovered from COVID-19 provides a novel, non-invasive approach to improving quality of life in this population. This intervention is particularly beneficial for global and mental fatigue, as well as vigor. Other subdomains may experience improvements to energy levels with a smaller effect size; future studies should be conducted to explore this potential.
This trial was funded by Young Living Essential Oils. Perhaps, this explains why there is no mention of the elephant in the room: the trial was not blind! Participants in the verum group knew that they received aromatherapy. Likewise, participants in the placebo group knew that they received the placebo.
Could this fact have influenced the outcome? Certainly!
Could the trial have been designed better? Certainly!
All the investigators needed to do is to use a nice-smelling oil that, according to aromatherapists, does not boost energy, as the placebo.
As it stands, we have no idea whether the authors’ assumption that the verum oil caused the effect is true.
Or maybe not?
Perhaps Young Living Essential Oils, the sponsor of the study and producer of the oil never wanted to know the truth. Maybe they are happy to abuse science as a marketing tool?
Aromatherapy, the use of essential oils for medicinal purposes, exists in several guises. One of them is inhalation aromatherapy which is a complementary therapy used in different clinical settings. But is there any sound evidence about its effectiveness?
The aim of this review was to assess the effectiveness of inhalational aromatherapy in the care of hospitalized pediatric patients.
A systematic review of clinical trials and quasi-experimental studies was conducted, based on PRISMA recommendations, searching Medline, Web of Science, Scopus, SciELO, LILACS, CINAHL, Science Direct, EBSCO, and updated databases. The Down and Black 2020, RoB 2020 CLARITY, and ROBINS-I 2020 scales were used through the Distiller SR software to verify the studies’ internal validity and risk of bias.
From 446 articles identified, 9 fulfilled the inclusion criteria. Seven were randomized controlled trials (RCTs), one pilot RCT, and one non-randomized quasi-experimental trial.
Different outcomes were analyzed, with pain being the most frequently measured variable. None of the 6 studies that evaluated pain showed significant effects with inhalation aromatherapy. Additionally, non-significant effects were found regarding nausea, vomiting, and behavioral/emotional variables.
The authors concluded that the findings are still inconclusive, and more evidence is required from future studies with high methodological quality, blinding, and adequate sample sizes.
Call me a skeptic, but I think the findings show quite clearly that there is no sound evidence to suggest that inhalation aromatherapy might be effective for kids.
In March 2020, ITV reported that a faith healer has been accused of “exploiting” people’s anxiety about the coronavirus crisis by selling a “plague protection kit” for £91. Bishop Climate Wiseman, head of the Kingdom Church in Camberwell, south London, has promised his followers the small bottle of oil and piece of red yarn will protect them from Covid-19. In a blog post, Bishop Wiseman claimed his concoction of cedar wood, hyssop and scarlet yarn acts as “an invisible barrier to the powers of darkness”. He wrote: “It is by faith that you can be saved from the coronavirus pandemic by covering yourself with the divine plague protection oil and wearing the scarlet yarn on your body. That is why I want to encourage you, if you haven’t done so already, to get your divine plague protection kit today!”
He claimed that the remedy was based on a passage from chapter 14 of the Old Testament Book of Leviticus. It reads: “Then he is to take the cedar wood, the hyssop, the scarlet yarn, and the live bird, dip them into the blood of the dead bird and the fresh water, and sprinkle the house seven times. In this way, he will make atonement for the house, and it will be clean.”
Bishop Wiseman told the PA news agency the church had sold more than 1,000 of the kits. “This is based on the Bible – I’m a Christian and there is a way that the Bible says to protect us from plagues.” One can also buy miracle money house blessing oil and anointed oil for court cases. On the Kingdom Church’s website, it claims thousands of people have been healed from “all sorts” of sickness and disease since it was founded in 2005.
Now, the Charity Commission has appointed an interim manager to the church following concerns raised by the National Secular Society about ‘plague protection kits’ sold by its bishop. England and Wales’s charity regulator announced that it appointed an interim manager to The Kingdom Church GB in February, who will “consider the charity’s future operation and viability”.
Elsewhere, the oil is advertised as follows:
Plagues Divine Protection Anointing Oil Have you been battling with countless amount of fear due to an economical wide spread of plaques and viruses? Then this Anointing Oil is for you.
The Plagues Divine Protection Anointing Oil was created by Master Prophet, Prophet Climate Wiseman through divine guidance and instruction from the Holy Spirit. This oil contains two biblical integrant which is biblically proven to remove plagues of all kind. These two Integrants are Hyssop and Cedar wood. The Bible clearly tells us in the book of Leviticus 14:51-53 “Then he is to take the cedar wood, the hyssop, the scarlet yarn and the live bird, dip them into the blood of the dead bird and the fresh water, and sprinkle the house seven times. He shall purify the house with the bird’s blood, the fresh water, the live bird, the cedar wood, the hyssop and the scarlet yarn. Then he is to release the live bird in the open fields outside the town. In this way he will make atonement for anointedoils
The commission said it had “serious ongoing concerns” about the charity’s administration and the financial relationship with its two subsidiary companies. It found the charity does not have a bank account and charity funds have instead been deposited into the charity’s subsidiaries’ bank accounts. It is investigating the legality of this relationship. The commission only appoints interim managers to charities “after very careful consideration” if there is misconduct or mismanagement in the administration of a charity, or if it is necessary or desirable to protect the charity’s property.
The post originally included claims that “every coronavirus and any other deadly thing” would “pass over” those using the oil and yarn. It was later edited to remove some specific references to coronavirus, but continued to claim people could “be saved from every pandemic” by using the oil and string.
This Cochrane review assessed the efficacy and safety of aromatherapy for people with dementia. The researchers included randomised controlled trials which compared fragrance from plants in an intervention defined as aromatherapy for people with dementia with placebo aromatherapy or with treatment as usual. All doses, frequencies and fragrances of aromatherapy were considered. Participants in the included studies had a diagnosis of dementia of any subtype and severity.
The investigators included 13 studies with 708 participants. All participants had dementia and in the 12 trials which described the setting, all were resident in institutional care facilities. Nine trials recruited participants because they had significant agitation or other behavioural and psychological symptoms in dementia (BPSD) at baseline. The fragrances used were:
- lavender (eight studies);
- lemon balm (four studies);
- lavender and lemon balm,
- lavender and orange,
- cedar extracts (one study each).
For six trials, assessment of risk of bias and extraction of results was hampered by poor reporting. Four of the other seven trials were at low risk of bias in all domains, but all were small (range 18 to 186 participants; median 66). The primary outcomes were:
- overall behavioural,
- psychological symptoms,
- adverse effects.
Ten trials assessed agitation using various scales. Among the 5 trials for which the confidence in the results was moderate or low, 4 trials reported no significant effect on agitation and one trial reported a significant benefit of aromatherapy. The other 5 trials either reported no useable data or the confidence in the results was very low. Eight trials assessed overall BPSD using the Neuropsychiatric Inventory and there was moderate or low confidence in the results of 5 of them. Of these, 4 reported significant benefit from aromatherapy and one reported no significant effect.
Adverse events were poorly reported or not reported at all in most trials. No more than two trials assessed each of our secondary outcomes of quality of life, mood, sleep, activities of daily living, caregiver burden. There was no evidence of benefit on these outcomes. Three trials assessed cognition: one did not report any data and the other two trials reported no significant effect of aromatherapy on cognition. The confidence in the results of these studies was low.
The authors reached the following conclusions: We have not found any convincing evidence that aromatherapy (or exposure to fragrant plant oils) is beneficial for people with dementia although there are many limitations to the data. Conduct or reporting problems in half of the included studies meant that they could not contribute to the conclusions. Results from the other studies were inconsistent. Harms were very poorly reported in the included studies. In order for clear conclusions to be drawn, better design and reporting and consistency of outcome measurement in future trials would be needed.
This is a thorough review. It makes many of the points that I so often make regarding SCAM research:
- too many of the primary studies are badly designed;
- too many of the primary studies are too small;
- too many of the primary studies are poorly reported;
- too many of the primary studies fail to mention adverse effects thus violating research ethics;
- too many of the primary studies are done by pseudo-scientists who use research for promotion rather than testing hypotheses.
It is time that SCAM researchers, ethic review boards, funders, editors and journal reviewers take these points into serious consideration – if only to avoid clinical research getting a bad reputation and losing the support of patients without which it cannot exist.
Aromatherapy is currently one of the most popular of all alternative therapies. It consists of the use of essential oils for medicinal purposes. Aromatherapy usually involves the application of diluted essential oils via a gentle massage of the body surface. Less frequently, the essential oils are applied via inhalation. The chemist Rene-Maurice Gattefosse (1881-1950) coined the term ‘aromatherapy’ after experiencing that lavender oil helped to cure a serious burn. In 1937, he published a book on the subject: Aromathérapie: Les Huiles Essentielles, Hormones Végétales. Later, the French surgeon Jean Valnet used essential oils to help heal soldiers’ wounds in World War II.
This Iranian study aimed to investigate the effect of inhalation aromatherapy with damask rose essence on pain and anxiety in burn patients. This three group clinical trial was conducted on 120 patients with burns less than 30% of total body surface area (TBSA). The patients were randomly allocated into three groups, aromatherapy damask rose essence, placebo, and control. The pain intensity was assessed using visual analogue scale prior to intervention, immediately before, and 15 min after dressing. Anxiety was measured using Spielberger Inventory at before intervention and 15 min after dressing, also the prolonged effect of intervention on pain was assessed by number of the analgesics drugs received for four hours after dressing change. The intervention included inhalation of 6 drops of 40% damask rose essential oil in the damask group, and six drops of distilled water in placebo group one hour before dressing change. The control group received no additional intervention. All groups also received standard care.
Baseline state-trait anxiety and pain intensity were similar in these three groups. A significant reduction was found in pain intensity immediately before and after dressing and state anxiety after dressing in the damask group compared to the placebo and control groups. The researchers found no significant difference between the placebo and control groups in terms of these variables at these times. No significant difference was noted among the three groups in frequency of analgesics drugs and trait anxiety after intervention.
The authors concluded that inhaled aromatherapy with Damask rose essence reduces subjective pain intensity and state anxiety in burned patients. Therefore, it is recommended considering use of damask rose essence, as an easy and affordable method along with other treatments.
These are interesting findings for sure. Aromatherapy is far less implausible than many other so-called alternative medicines (SCAMs). It furthermore has the advantages of being safe and inexpensive.
I have no reason to doubt the validity of the study. Yet, I nevertheless think it is prudent to insist on an independent replication before issuing a general recommendation.
In 2012, we evaluated the efficacy/effectiveness of lavender for the reduction of stress/anxiety.
Our systematic review included 15 RCTs. Two trials scored 4 points on the 5-point Jadad scale, the remaining 13 scored two or less. Results from seven trials appeared to favour lavender over controls for at least one relevant outcome. We concluded that methodological issues limit the extent to which any conclusions can be drawn regarding the efficacy/effectiveness of lavender. The best evidence suggests that oral lavender supplements may have some therapeutic effects. However, further independent replications are needed before firm conclusions can be drawn.
Since 2012, more evidence has emerged. The latest study on the subject aimed to investigate the effects of lavender oil on sleep and quality of life of menopausal women through steam inhalation. It was quasi-experimental with pre-test/post-test placebo control groups. It was conducted with 57 women, 27 of whom were subject to aromatherapy and 30 to a placebo. Data were collected using the Questionnaire Form, the Pittsburgh Sleep Quality Index (PSQI) and the Menopause-Specific Quality of Life Questionnaire (MENQOL).
For the intervention group, the PSQI median scores after the administration of aromatherapy were found to be significantly lower than those before the administration (p < 0.001) and those of the placebo group (p < 0.001). Similarly, for the intervention group, the total median MENQOL scores after the administration of the aromatherapy were found to be significantly lower than the scores prior to the administration (p < 0.001) as well as the scores of the placebo group (p < 0.001).
The authors of the new study concluded that that aromatherapy involving lavender-scented steam inhalation increased sleep quality and quality of life in women with sleep deprivation problems during menopause.
Hurray, this seems to be a decent trial with a positive result for SCAM!
And why not? It is not at all implausible that lavender has hypnotic effects. There are now quite a few reasonably sound trials that suggest it works. Moreover, it is safe and not very expensive (or even free, if you can grow it yourself).
I for one am more than happy to report a positive finding for a SCAM and merely regret that I cannot do so more often.
My ‘Corona-Virus Quackery Club’ (CVQC) is getting rather popular. The current members,
are now thinking of admitting the essential oil salesmen. It seems that many of them find it impossible to resist the chance to make a fast buck on the fear many consumers currently have. Take this website for instance:
If you have a breathing aid or respiratory device, use it to reduce breathing difficulties. Alternatively, you can use a breathing ointment like Breathe and Focus Oil. Formulated with menthol, eucalyptus, rosemary and thyme essential oils, this phyto-aromatherapy ointment helps ease breathing difficulties commonly associated with cold, flu, cough, asthma and pneumonia. Gently massage a few drops of Breathe and Focus Oil to your chest and apply 1 to 2 drops to a tissue or handkerchief then inhale the aroma. Repeat as often as necessary.
Studies showed that eucalyptus essential oil contains cineole that helps reduce inflammation and infection in the lungs. Eucalyptus Radiata essential oil has antiviral effects against coronavirus SARS. Rosemary essential oil has been shown to be effective against Klebsiella pneumoniae, a bacteria which causes pneumonia in humans and animals. Thyme essential oil has been shown to have antiviral activities against Influenza A virus (H1N1), while menthol with its cooling-effect has also been shown to reduce breathing difficulties. These essential oils may help you dealing with Covid-19 disease.
Another website even has the promising title ‘What can you try to cure from coronavirus ….’ and it tells us that:
Black cumin can boost immunity, especially in patients with impaired immune systems. According to research, 1 gram Seed capsules, twice daily for four weeks can improve T-cell ratio between positive and negative up to 72%. Increased immunity plays an important role in the healing of colds, influenza, AIDS, and other diseases related to the immune system.
But there is more – so much more that I can here only present a very small selection of that is on offer.
- Cinnamon bark
- Clove bud
- Eucalyptus globulus/radiata
- Lemon myrtle
- Tea tree
- Thyme thymol & linalool
Yet another website includes the claim: “The most powerful anti-virus essential oils to provide defence (sic) against coronavirus include:
- Cedarwood Virginian
- Clove Bud
- Eucalyptus Globulus, Radiata and Smithii
- Juniper Berry
- Lavender Spike
- Laurel leaf
- Tea Tree
- Thyme Sweet Thyme White.”
I know, this is confusing! I do sympathise with the difficulty of choosing between all these recommendation; therefore, let me help you. Here is the full list of essential oils proven to prevent or treat a corona-virus infection:
Yes, that’s right: NO ESSENTIAL OIL HAS EVER BEEN FOUND TO BE EFFECTIVE AGAINST THIS OR ANY OTHER VIRUS INFECTION!
The FDA agree and have therefore sent out letters to seven US companies warning them to stop selling products that claim to cure or prevent COVID-19 infections, stating that such products are a threat to public health because they might prompt consumers to stop or delay appropriate medical treatment.
WELCOME TO THE CVQC, ESSENTIAL OIL SALESMEN!
The Internet is full of complete nonsense about alternative medicine, as we all know. Much of it could be funny – if it was not so extremely dangerous. Misinformation on health can (and I am afraid does) kill people. One of the worst BS I have seen for a long time is this article entitled ‘Here’s What Oncologists Won’t Tell You About Essential Oils’.
A few excerpts might be of interest:
START OF QUOTES
…The human body resonates at a frequency of 62-78 MHz and scientists believe that diseases start at 58 MHz. Many studies have shown that negative thoughts can reduce our frequency by 12 MHz, while positive thinking raises it by 10.
This means that there are many things that can affect our health in ways we can’t imagine.
According to the latest studies, essential oils can fight cancer thanks to their antibacterial properties and their ability to change the frequency we resonate at.
One of the scientists involved in the study, Bruce Tainio, developed a special Calibrated Frequency Monitor that measures the frequency of essential oils and how they affect us. M. Suhail, an immunologist, says that cancer develops when the DNA in our cells’ nucleus is corrupted.
Essential oils can correct this and repair the code, effectively improving our chances against the terrible disease…
In his book “The Body Electric”, R. O. Becker said that our bodies’ electronic frequency determines our health.
Even Nikola Tesla said that removing outside frequencies can make us more resistant against ailments, while Dr. Otto Warburg discovered over a century ago that our cells have a specific electrical voltage that can drop due to a various factors and trigger diseases such as cancer.
However, science has now discovered that essential oils with higher frequencies can destroy diseases with lower frequencies.
Here’s a list of some of the oils used in the research and their electrical frequencies:
- Juniper – 98 Mhz
- Angelica – 85 Mhz
- Frankincense – 147 MHz
- Rose – 320 Mhz.
- Sandalwood – 96 Mhz
- Helichrysum – 181 MHz
- Peppermint – 78 Mhz
- Lavender – 118 Mhz
In the study, cinnamon, thyme, jasmine and chamomile oils had the best results when put up against breast cancer cells. Chamomile destroyed 93% of the cells in vitro, while thyme destroyed 97% of the cells…
11 oils were examined in total including bitter and sweet fennel, winter savory, peppermint, sage, lavender, chamomile and thyme.
According to Suhail, frankincense oil can divide the nucleus of cancer cells from the cytoplasm and prevent it from reproducing. The oil works thanks to the presence of the so-called monoterpenes which have the ability to kill cancer cells.
Frankincense oil works in all stages of cancer and is cytotoxic, meaning it doesn’t destroy healthy cells.
End-stage liver cancer patient
In the study, a patient with end-stage liver cancer was given only a few months left to live. The tumor was inoperable due to the large size, so having nothing to lose, the man decided to try frankincense oil.
He applied a bit under his tongue and topically on the area of the liver, and on his next doctor visit, the tumor has already reduced in size. The patient continued using frankincense oil, and it eventually reduced just enough to be operable. His tumor was later removed and the man is now happily enjoying his life free of cancer.
A child with brain cancer
One of the toughest cases among all the patients in the study was a little girl aged 5 with brain cancer. After exhausting all other options, the parents decided to give the girl a mixture of frankincense and sandalwood oil.
They rubbed the mixture on her feet while also rubbing a bit of lavender on her wrist. After a few months, the cancer was completely defeated!
Bladder cancer patient
Jackie Hogan is a woman suffering from bladder cancer who needed to undergo a surgery for bladder removal due to the cancer.
However, she decided to try using essential oils in her condition and after a few months of applying a mixture of sandalwood and frankincense oil topically on the area, she is cancer-free.
Stage-4 cancer patient
One woman in the research was diagnosed with stage-4 lung cancer which has already spread to other organs in her body.
Instead of agreeing to chemo and surgery, the woman started applying a bit of frankincense oil topically on the affected areas of her body every 2-3 hours and she was completely healthy in 7 months.
Breast cancer patient
A woman diagnosed with advanced breast cancer used a mixture of frankincense and lemongrass oil (topically and under the tongue) to defeat the disease in only a few months.
Cervical cancer patient
A woman with cervical cancer was given only a few months left to live, but thanks to the powers of frankincense oil, she managed to defeat the diseases in a couple of months.
There are many more patients who have managed to defeat different types of cancer using the remarkable powers of various essential oils…
END OF QUOTES
I managed to find 4 of the studies this article seems to refer to:
Differential effects of selective frankincense (Ru Xiang) essential oil versus non-selective sandalwood (Tan Xiang) essential oil on cultured bladder cancer cells: a microarray and bioinformatics study.
Dozmorov MG, Yang Q, Wu W, Wren J, Suhail MM, Woolley CL, Young DG, Fung KM, Lin HK.
Chin Med. 2014 Jul 2;9:18. doi: 10.1186/1749-8546-9-18. eCollection 2014.
Ni X, Suhail MM, Yang Q, Cao A, Fung KM, Postier RG, Woolley C, Young G, Zhang J, Lin HK.
BMC Complement Altern Med. 2012 Dec 13;12:253. doi: 10.1186/1472-6882-12-253.
Woolley CL, Suhail MM, Smith BL, Boren KE, Taylor LC, Schreuder MF, Chai JK, Casabianca H, Haq S, Lin HK, Al-Shahri AA, Al-Hatmi S, Young DG.
J Chromatogr A. 2012 Oct 26;1261:158-63. doi: 10.1016/j.chroma.2012.06.073. Epub 2012 Jun 28.
Suhail MM, Wu W, Cao A, Mondalek FG, Fung KM, Shih PT, Fang YT, Woolley C, Young G, Lin HK.
BMC Complement Altern Med. 2011 Dec 15;11:129. doi: 10.1186/1472-6882-11-129.
I do not think that these papers actually show what is claimed above. Specifically, none of the 4 articles refers to clinical effects of essential oil on cancer patients. In fact, according to a 2014 review, and a 2013 paper (the most recent summaries I found) there are no clinical trials of essential oil as a cure for cancer.
The conclusion therefore must be this: Essential oils might be an interesting area of research, yet one has to tell consumers and patients very clearly:
there is no evidence to suggest that using essential oils will change the natural history of any type of cancer.