I’m newbie to EO. I’ve purchased Peppermint, Wild Orange, Lavender, Clove from Doterra to start with (quite pricey) and then I discovered a nice selection of EO in Marshalls (!). There i purchased Pine, Lemon and Eucalyptus from Plantlife ‘100 % pure aromatherapy grade’ at a fraction of the cost. Firstly, can you please explain the difference of quality with Doterra and Plantlife? And secondly, you say when rubbed onto the skin, the oils need to be diluted – but with what? And where do I find this? (Trader Joe’s perhaps?) What is the safest ‘dilution’ for someone in the journey of starting of a family? My acupuncturist made up a Doterra rollerball ‘Fertility blend’ with Cary Sage. Thanking you kindly.
Heavy Metal testing shows the amount of heavy metal content in the essential oil. When properly distilled, essential oils should not contain heavy metals. ICP-MS testing uses a high-energy medium called Inductively Coupled Plasma (ICP) to ionize the sample. The sample is then run through a mass spectroscope, which separates the sample into its elemental parts and provides a reading about which elements are present and at what quantities.
Vibrational energy in molecules refers to the the vibration of bound atoms within a particular molecule. For example, if we look at a very simple molecule like carbon dioxide, we can measure the vibration or frequency of what is referred to the carbonyl stretch (the stretching motion of the double bond between the carbon and the oxygen atoms). The larger the molecule is the more vibrational motions it will have. Molecules in essential oils would have many different bond vibrations going on because even the smaller molecules (monoterpenes) consist of 10 carbon atoms and 16 hydrogen atoms. Thus all essential oil molecules would have many different vibrations going on simultaneously and each different type of vibrational motion in each different bond would have its own characteristic frequency. These vibrational frequencies in molecules are measured using infrared (IR) spectroscopy because energy in the IR range of the electromagnetic spectrum is what is required to cause these vibrations. The magnitude of Infrared radiation is in the 10,000,000,000,000 to 400,000,000,000,000 Hertz range!

Additionally, inhaling scents bring the chemical - healing plant chemical,  or toxic synthetic chemical - straight into our lungs, while also bypassing the blood brain barrier and this can have nearly immediate effects on our neurological health. Again, this is one of the reasons why oils can be so powerful. We are able to utilize their healing benefits without needing to digest and assimilate anything. Easy entry. This is also why I advise using top quality oils for all oil applications, whether it's on your body or in your home.
What about the claims that essential oils are perfectly safe to ingest? That’s not necessarily true. Essential oils are broken down in the liver into phytochemicals, and if they accumulate, they can become toxic to the body. While a study of one is hardly convincing evidence, a woman who ingested peppermint oil was brought to the hospital in a comatose state.
“USE ESSENTIAL OILS TO HELP YOUR MOOD. Lavender, peppermint, grapefruit, chamomile, lemon, ylang-ylang all help produce happy, joyous moods. Clary sage helps with PMS (although there have been reports that overuse of clary sage can lead to intoxication). Rosemary increases focus and concentration. Don’t forget the mood benefits of essential oils. Here’s an information packed aromatherapy reference chart to refer to.”

Hello! I enjoyed your post and it was very informative. I tried the construction paper test with my Mountain Rose Herbs oils and there was a residue! Tried with peppermint and with fennel. Sigh. I have ordered my oils from this company for years. Any thoughts? I feel like they are a legit company, no multi-level marketing schemes going on, no president with a shady psychotic past. What to do, what to do???
Allergens are almost always composed of proteins or polypeptides, which are relatively large molecules. There are no proteins or polypeptides in essential oils. In fact, nitrogen containing compounds are virtually non-existent in essential oils except in occasional trace amounts. Allergens are composed of large molecules. There are no large molecules in volatile or aromatic oils, otherwise they would be neither volatile or aromatic.
^ Aizpurua-Olaizola, Oier; Ormazabal, Markel; Vallejo, Asier; Olivares, Maitane; Navarro, Patricia; Etxebarria, Nestor; Usobiaga, Aresatz (2015-01-01). "Optimization of supercritical fluid consecutive extractions of fatty acids and polyphenols from Vitis vinifera grape wastes". Journal of Food Science. 80 (1): E101–107. doi:10.1111/1750-3841.12715. ISSN 1750-3841. PMID 25471637.
An essential oil is a concentrated hydrophobic liquid containing volatile (defined as "the tendency of a substance to vaporize") aroma compounds from plants. Essential oils are also known as volatile oils, ethereal oils, aetherolea, or simply as the oil of the plant from which they were extracted, such as oil of clove. An essential oil is "essential" in the sense that it contains the "essence of" the plant's fragrance—the characteristic fragrance of the plant from which it is derived.[1] The term essential used here does not mean indispensable as with the terms essential amino acid or essential fatty acid which are so called since they are nutritionally required by a given living organism.[2] In contrast to fatty oils, essential oils typically evaporate completely without leaving a stain or residue.
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