Here are links to some studies I have found:
https://www.ncbi.nlm.nih.gov/pubmed/24330413 Herbal medicine use in pregnancy: results of a multinational study.
https://www.ncbi.nlm.nih.gov/pubmed/23843424 In vitro inhibition of human CYP1A2, CYP2D6, and CYP3A4 by six herbs commonly used in pregnancy.
http://www.pregnancy.com.au/resources/topics-of-interest/pregnancy/raspberry-leaf.shtml Raspberry Leaf info from Austrailia
http://www.uofmhealth.org/health-library/hn-2154002 University of Michigan Health System
This on is worth exploring: http://www.herbcyclopedia.com/item/raspberry-leaf-tea-2
I have included here some links to studies I found on various herbs
https://www.ncbi.nlm.nih.gov/pubmed/17514536 Antioxidant and antimicrobial activities of native Rosa sp. from British Columbia, Canada.
Rose hip inhibits chemotaxis and chemiluminescence of human peripheral blood neutrophils in vitro and reduces certain inflammatory parameters in vivo. https://www.ncbi.nlm.nih.gov/pubmed/17657440
https://www.ncbi.nlm.nih.gov/pubmed/18355409 Aqueous extracts from peppermint, sage and lemon balm leaves display potent anti-HIV-1 activity by increasing the virion density.
https://www.ncbi.nlm.nih.gov/pubmed/23828496 Antioxidant and antihypertensive activity of extract from Thymus serpyllum L. in experimental hypertension.
https://www.ncbi.nlm.nih.gov/pubmed/21452174 Anti-tumorigenic activity of five culinary and medicinal herbs grown under greenhouse conditions and their combination effects.
https://www.ncbi.nlm.nih.gov/pubmed/19809973 Impact of thymol in thyme extracts on their antispasmodic action and ciliary clearance.
Here are links to some studies on the value of Neem.
Healing Skin Issues:
https://www.ncbi.nlm.nih.gov/pubmed/24851844 A plant-derived wound therapeutic for cost-effective treatment of post-surgical scalp wounds with exposed bone. CONCLUSION: This retrospective, non-controlled analysis supports ONE as a simple-to-use and safe treatment option for scalp wounds with exposed bone. Treatment costs compare favorably to those published for other treatment modalities.
https://www.ncbi.nlm.nih.gov/pubmed/23835719 Neem (Azadirachta indica): prehistory to contemporary medicinal uses to humankind.
https://www.ncbi.nlm.nih.gov/pubmed/26195902 Effect of Neem oil and Haridra on non-healing wounds. CONCLUSION: Topical use of Neem oil and oral use of Haridra powder capsule used in combination were found effective for chronic non-healing wounds.
https://www.ncbi.nlm.nih.gov/pubmed/16900389 Efficacy of neem seed extract shampoo on head lice of naturally infected humans in Egypt
https://www.ncbi.nlm.nih.gov/pubmed/21484346 Ovicidal effects of a neem seed extract preparation on eggs of body and head lice.
https://www.ncbi.nlm.nih.gov/pubmed/20461406 The efficacy of neem seed extracts (Tre-san, MiteStop on a broad spectrum of pests and parasites
https://www.ncbi.nlm.nih.gov/pubmed/27687478 Neem toward the idea insecticide
https://www.ncbi.nlm.nih.gov/pubmed/27552943 Neem cake as a promising larvicide and adulticide against the rural malaria vector Anopheles culicifacies
https://www.ncbi.nlm.nih.gov/pubmed/27178630 Ethnobotanical uses of neem (Azadirachta indica A.Juss.
https://www.ncbi.nlm.nih.gov/pubmed/21695566 Observations on effects of a neem seed extract (MiteStop®) on biting lice (mallophages) and bloodsucking insects parasitizing horses.
Here are some studies:
https://www.ncbi.nlm.nih.gov/pubmed/15025863 Inhibition of acetylcholinesterase by Tea Tree oil.
https://www.ncbi.nlm.nih.gov/pubmed/25756296 Essential oils in the management of the donkey louse….Conclusion: These results demonstrate that the inclusion of essential oil suspensions during grooming can be used to manage louse populations successfully.
INTRODUCTION: Pediculosis capitis is a public health problem with a high prevalence. The emergence of parasite resistance to conventional pediculicide is of great concern worldwide.
RESULTS: The results showed 100% effectiveness; short time of death, ovicidal action, activity on the adhesion of the egg, and low toxicity.
https://www.ncbi.nlm.nih.gov/pubmed/26462802 The potential application of plant essential oils to control Pediculus humanus capitis (Anoplura: Pediculidae).
https://www.ncbi.nlm.nih.gov/pubmed/22847279 Activity of tea tree oil…..on head lice
https://www.ncbi.nlm.nih.gov/pubmed/22177577 Toxicity of essential and non-essential oils against the chewing louse, Bovicola (Werneckiella) ocellatus
https://www.ncbi.nlm.nih.gov/pubmed/9439284 The potential effectiveness of essential oils as a treatment for headlice, Pediculus humanus capitis.
Here are some studies that look at Essential Oils and Pain Relief
Anti-Inflammatory Effects of the Essential Oils of Ginger (Zingiber officinale Roscoe) in Experimental Rheumatoid Arthritis.
Essential oils and Rheumatoid Arthritis
Essential Oils used in Aromatherapy. Conclusion: From above reports and study, we can conclude that aromatherapy is natural and noninvasive gift of nature for humans. It’s not only the disease symptoms which are eradicated but the whole body is rejuvenated by the use of aroma. Aromatherapy regulates the physiological, spiritual and psychological upliftment for the new phase of life. This therapy is not only preventive but also can be used in the acute and chronic stages of disease. Pharmaceutical industries are trying for environmental friendly, alternative and natural medicine for disease associated with pathogens and metabolism. There may be a possibility of enhancing the rate of reaction and bioavailability of drugs from the use of these essential oils.
Essential Oil Therapy for Shingles
Effect of aromatherapy massage with lavender essential oil on pain in patients with osteoarthritis of the knee: A randomized controlled clinical trial. Conclusion: Aromatherapy massage with lavender essential oil was found effective in relieving pain in patients with knee osteoarthritis. However, further studies are needed to confirm findings of this study.