Although they may not be the perfect replacement for all synthetic pesticides, essential oils have prospects for crop or indoor plant protection, urban pest control,[31] and marketed insect repellants, such as bug spray. Certain essential oils have been shown in studies to be comparable, if not exceeding, in effectiveness to DEET, which is currently marketed as the most effective mosquito repellent. Although essential oils are effective as pesticides when first applied in uses such as mosquito repellent applied to the skin, it is only effective in the vapor stage. Since this stage is relatively short-lived, creams and polymer mixtures are used in order to elongate the vapor period of effective repellency.[27]
The ISO created quality standards for essential oils under the TC-54 Guidelines.  One of these quality guidelines is to use Gas Chromatography to test for the active phytochemical content of each oil and if it does not meet these minimum amounts, the oil is not considered of value.  Most essential oils companies do not even consult these guidelines when purchasing their oils, thus they cannot be of any theraputic value even though they may use that term as a marketing strategy. If an oil is not ISO certified, then do not buy it.
Most oils do degrade with age due to oxidation but there are some oils, such as sandalwood, vetiver, patchouli, etc. that actually get better with age, at least to a certain point (I am not sure anyone knows what sandalwood looks like after say 5000 years and I am pretty sure well before then the oil would “resinify” and become solid). Its typically the heavier oils that are high in sesquiterpene alcohols that get better with age. However, most oils, especially the citrus oils and the blue oils will degrade with age (at least within human lifetimes). Citrus oils are especially prone to degradation due to the high levels of limonene which oxidizes relatively easily. Even very small amounts of limonene oxide formation can totally destroy the odor of a once good citrus oil. In addition, wax formation in citrus due to monoterpene polymerization is also quite common over time. For this reason its best to go through citrus oils within a year, if possible.
For parents whose infants’ brains and bodies are immunologically and developmentally immature, be aware that your children may be forced to suffer untested-for and therefore unacknowledged long term neurological, autoimmune and chronic illness adverse effects. Parents need to be aware that if their infant dies, is sickened or is made chronically ill by vaccine ingredients, they, as protective parents, will be forbidden to sue the guilty drug company (or the doctor that administered them) for appropriate damages.

The recommended usage of many essential oils is hotly contested throughout the aromatherapy profession. The majority of oils you find in the supermarket are absolutely safe (though you should research them before using them); however, once you start digging into the world of essential oils, you’ll find that professionals – even within the same organization – debate extensively over the use of certain oils. If you’re ever unsure about an oil or its use, do the research you can, and if you still cannot make up your mind as to its safety – avoid it. But, by all means, do NOT be afraid of essential oils. Just use them with care and respect, and all will be fine.

This isn’t a list of oils specifically, but they do have an up-to-date list of endangered plants This company is started by the same woman who helped start Mountain Rose Herbs, so they are trying to support farmers who will grow the endangered plants so we can have a sustainable supply of them on the market while they are being responsibly propagated. Its pretty awesome
The Medicinal Oil Association (MOA) was founded to be an independent quality control regulating body for the essential oil industry. It was founded by Dr Jed Adamson ND and Dr Tracy Gibbs PhD. The popularity of and wide spread use of essential oils is similar to the growth of the dietary supplement industry in the early 1990’s but today, just as then, there is no regulatory body to determine safety, purity or misuse of essential oils.
I have been using, ingesting and inhaling these oils for 10 years, and have had arthritis pain minimized, cholesterol levels lowered, my husband’s BP lowered in 20 minutes, been able to sleep without taking a drug, had excruciating reflux diminished and often eliminated in minutes. I don’t know what they can do for you…each person is different, you have to “play” with them until you find what works for your body chemistry. God created the plants for healing, not pharmaceutical companies. Sometimes there may be a need for a pharmaceutical for a limited time, but mostly…I’LL STICK WITH MY OILS and herbs thank you!
Essential oils on the market were analyzed using GC-MS and the main ingredients of each essential oil were quantified. Analysis of the essential oil of Lavandula officinalis (lavender oil) showed that each sample had a different ratio of the contents of main ingredients, such as linalool, linalyl acetate, and camphor. In addition, some commercial lavender oils were analyzed by GC-MS for comparison with the Lavandula flagrans (lavandin oil) and the reference standard. As a result of this analysis, although the components of almost all commercial lavender oils were approximately the same as those of the reference standard, there were a few products that contained more than 0.5% of the amount of camphor in lavandin oil. This suggests that some lavender oil samples are mixed with lavandin oil to lower the price. Commercial essential oils of Melaleuca alternifolia (teatree oil) and Mentha piperita (peppermint oil) were also analyzed by GC-MS. Each of the peppermint oil samples had a different ratio in the content of its main ingredient. With respect to teatree oils, the amount of terpinens in each sample differed. These results led to concern about the efficacy of essential oils. For achieve the expected efficacy of essential oils, correct information on their ingredients should be available and quality control using instrumental analysis should be introduced.
I am motivated to use oils due to their natural healing abilities. YLEO are pure. They offer a seed to seal guarantee. I trust the quality. I used YLEO Thieves to treat pre-cancer growths on my arm, I use lavender instead of a sleep aid, Stress Away instead of anti-anxiety Meds, I use oils for pain control, face/skin care – in fact, I now make my own products, make my own laundry soap & scent with YLEO. I could go on & on. The impact YLEO have had on my life is huge. Being a member of the Young Living organization provides me the support I need to learn more & more about using essential oils.

Aromatherapy is the practice of using volatile plant oils, including essential oils and their volatile aromatic compounds, for psychological and physical well-being. Aromatherapy, which also goes by “essential oil therapy,” is defined as the art and science of utilizing naturally extracted aromatic essences of plants to “balance, harmonize and promote the health of body, mind and spirit.”
In our scent tests the Stillpoint’s oils started off smelling mild and fresh, but then after a minute or two they magically blossomed and became very rich, deep, vibrant, stronger and more clear; almost like a fine wine opens up after being uncorked for some time. And for those who may be sensitive to subtle energies, these oils possessed a very clean and high vibration, which is an enormous benefit when using the oils for spiritual practice. No other oils we tested performed this way.
From the best that I can understand it, YL claims that their method of testing goes far and beyond almost any other in the US. They state that the GC column length should be at least 50-60 meters in order to allow “double-phased ramping–which makes it possible to identify constituents that occur in very small percentages by increasing the separation of compounds.” YL states that almost all US labs only use a 30-meter column in their testing. The extent of this testing apparently is able to spot possible toxins that would be damaging to the brain, etc. at a molecular level.
An essential oil does not have to be adulterated to be inferior. Plant quality, climate, location, growing conditions, harvest, and production technique have a lot to do with quality. Of course, environmental conditions directly affect the percentages of each component of the essential oil. Botanical variety and Chemotype identification also play a part in quality determination. Like organic, ‘wild crafted’ is another overused term. Many imported essential oils come from non-plantation sources.
What you could do is use one of the safer mint essential oils as a flavoring. I have a great recipe for peppermint brownies and just made homemade ranch with Basil EO. If you have a highly tested pure oil than the therapeutic benefits are really great for using certain ones as flavoring in food or water. Always use a very pure oil that says safe for internal use on the bottle and that is on the FDA’s GRAS list. Peppermint is a great one to replace Wintergreen but Spearmint would also really work and has a more gentle effect in regard to its therapeutic properties.

I believe, and know from experience that if essential oils have to comply with the TGA, it is not possible to sell pure, authentic, genuine essential oils. The TGA has excellent standards for safety and efficacy – however they insist that essential oils comply with British Pharmacopeia (BP) monographs. This often means that the oil has to be rectified or adulterated. Off course, the essential oil producer always claims that their oils are totally natural and have not been modified.
The worst deception is when poor companies use synthetic fragrances mixed into vegetable oil and pass it off as true essential oil. This is where the real danger to your health can come: the National Academy of Sciences reported that the 95 percent of synthetic fragrances come from petroleum and have the potential to cause cancer, birth defects, central nervous system disorders and allergic reactions.
Essential oils will last for at least 5 years (if not 10), so one bottle could literally last you a decade. Hopefully that thought will help mitigate the cost involved in purchasing some essential oils. Because they are SO concentrated and only a tiny amount is needed in anything you do, they’ll last you a very, very long time. The only exception to this rule is citrus oils, which will see a reduction in potency after a year or two.

People who are new to natural, alternative or holistic medicine may have a bit of a learning curve in using essential oils in holistic ways. Based as much on intuition as hard and fast techniques, the holistic use of essential oils can sometimes be more art than science. Addressing the underlying cause of disease can be slower, less direct and more ambiguous than focusing solely on the symptoms. However, addressing the root cause of disease holistically holds the promise of true and lasting healing. It is therefore best to combine both medicinal and holistic medicine together, using one to complement the other.

The potential danger of an essential oil is sometimes relative to its level or grade of purity, and sometimes related to the toxicity of specific chemical components of the oil. Many essential oils are designed exclusively for their aroma-therapeutic quality; these essential oils generally should not be applied directly to the skin in their undiluted or "neat" form. Some can cause severe irritation, provoke an allergic reaction and, over time, prove hepatotoxic.