I can’t say how underrated steam is when it comes to anything dealing with a cough, cold, or congestion. Not only does the steam quite literally loosen mucous and phlegm, almost immediately, but you can add numerous essential oils that will impart wonderful healing benefits. These benefits (anti-viral, anti-bacterial, anti-inflammatory etc.) do become airborne, so you inhale them while you breathe in the steam. For this particular blend I’ve included both tea tree oil and eucalyptus oil, which can help soothe and open your airways as well as help fight off bacteria or a virus.
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On the other hand, pathological ketoacidosis is a consequence of other disease conditions such as poorly managed type one diabetes. In this case, the level of ketones will be in the range of 15 to 25 mM. These extremely high levels of ketones can be a serious health problem. The ketogenic diet does not produce this level of ketones. For a thorough discussion of the scientific literature related to the use of the ketogenic diet in cancer treatment I recommend the treatise on the subject by Dr. Thomas N. Seyfried, Cancer as a Metabolic Disease. 
Astragalus is one of the most popular herbs in the traditional Chinese medicine system. It has been in use for over 2000 years. This herb is most often used as a diuretic and for lowering high blood pressure. Many people use it to treat upper respiratory infections as well as the common cold, as it seems to increase the production of white blood cells. Traditionally, this astragalus has also been used to increase energy, strengthen the immune system, treat excessive sweating, ulcers and diarrhea.
Saw palmetto is a very popular herb with men over 40. It is often used to treat Benign Prostatic Hyperplasia (BPH) and it’s symptoms, like painful urination and the need to urinate frequently. Another popular use of this herb is to treat male pattern baldness by reducing the body’s levels of dihydrotestosterone (DHT). Too much DHT is believed to be what causes hair loss.
^ Vogl S, Picker P, Mihaly-Bison J, Fakhrudin N, Atanasov AG, Heiss EH, Wawrosch C, Reznicek G, Dirsch VM, Saukel J, Kopp B (Oct 2013). "Ethnopharmacological in vitro studies on Austria's folk medicine--an unexplored lore in vitro anti-inflammatory activities of 71 Austrian traditional herbal drugs". Journal of Ethnopharmacology. 149 (3): 750–71. doi:10.1016/j.jep.2013.06.007. PMC 3791396. PMID 23770053.
Witch hazel is an interesting herb that I've only recently found out about, it has been used for centuries by the Native Americans though. When I was researching witch hazel I assumed that it got its name for warding off witches or something, but it actually was used as a witching stick for locating underground sources of water and or precious minerals. Witch hazel might not be considered an herb by some due to the fact it is a woody shrub, but it has very strong astringent and antiseptic properties so I just had to include it in the list of herbs along with its uses. Today you can find witch hazel in pretty much any drugstore in the form of witch hazel water (an alcohol extract of the twigs). The only problem with this is that most of the time the extract contains very little of the actual herb, and most of the effects might actually come from the alcohol itself.
This mushroom has a long history of use in Chinese herbalism. It is considered a great tonic for building physical strength and endurance. There is a substance in cordyceps which dilates the lung’s airways, providing more oxygen to the blood. For this fact it is very popular with athletes. This healing mushroom is also used to treat asthma, cough and bronchitis. It possesses anti-inflammatory properties and has the ability to relax the bronchial walls. It’s a great immune system booster as well.
Hippophae rhamnoides Sea buckthorn The leaves are used as herbal medicine to alleviate cough and fever, pain, and general gastrointestinal disorders as well as to cure dermatologic disorders. Similarly, the fruit juice and oils can be used in the treatment of liver disease, gastrointestinal disorders, chronic wounds or other dermatological disorders.
In Europe, apothecaries stocked herbal ingredients for their medicines. In the Latin names for plants created by Linnaeus, the word officinalis indicates that a plant was used in this way. For example, the marsh mallow has the classification Althaea officinalis, as it was traditionally used as an emollient to soothe ulcers. Ayurvedic medicine, herbal medicine and traditional Chinese medicine are other examples of medical practices that incorporate medical uses of plants. Pharmacognosy is the branch of modern medicine about medicines from plant sources. Plants included here are those that have been or are being used medicinally, in at least one such medicinal tradition.
Scientists don’t know for sure. Since chemotherapy and radiation kill cells that divide often, stem cells may be less vulnerable because they rarely divide. Some scientists believe cancer stem cells may have genetic mutations that make them resistant to damage from chemotherapy or radiation, or cancer stem cells may be able to repair DNA damage more rapidly than normal cells.