WebMD, Gary D. Vogin, Echinacea Linked to Allergies (link)
Gilroy, Christine M., et al. Echinacea and truth in labeling. Archives of Internal Medicine 163.6 (2003): 699-704. (link)
Lin, Sheng-Dun, Jih-Min Sung, and Chung-Li Chen. Effect of drying and storage conditions on caffeic acid derivatives and total phenolics of Echinacea purpurea grown in Taiwan. Food Chemistry 125.1 (2011): 226-231. (link)
Lee, Tzu Tai, et al. Study on antioxidant activity of Echinacea purpurea L. extracts and its impact on cell viability. African Journal of Biotechnology 8.19 (2009). (link)
Erenler, Ramazan, et al. Chemical Constituents, Quantitative Analysis and Antioxidant Activities of E chinacea purpurea (L.) M oench and E chinacea pallida (N utt.) N utt. Journal of food biochemistry 39.5 (2015): 622-630. (link)
Melchart, D., et al. Immunomodulation with Echinacea—a systematic review of controlled clinical trials. Phytomedicine 1.3 (1994): 245-254. (link)
Kim, Hyung-Ran, et al. Immune enhancing effects of Echinacea purpurea root extract by reducing regulatory T cell number and function. Natural product communications 9.4 (2014): 1934578X1400900422. (link)
Zhai, Zili, et al. Enhancement of innate and adaptive immune functions by multiple Echinacea species. Journal of medicinal food 10.3 (2007): 423-434. (link)
Shah, Sachin A., et al. Evaluation of echinacea for the prevention and treatment of the common cold: a meta-analysis. The Lancet infectious diseases 7.7 (2007): 473-480. (link)
Haller, Jozsef, Judit Hohmann, and Tamas F. Freund. The effect of Echinacea preparations in three laboratory tests of anxiety: comparison with chlordiazepoxide. Phytotherapy research 24.11 (2010): 1605-1613. (link)
Sharma, M., et al. The potential use of Echinacea in acne: control of Propionibacterium acnes growth and inflammation. Phytotherapy Research 25.4 (2011): 517-521. (link)
Yotsawimonwat, S., et al. Skin improvement and stability of Echinacea purpurea dermatological formulations. International journal of cosmetic science 32.5 (2010): 340-346. (link)
Oláh, Attila, et al. Echinacea purpurea-derived alkylamides exhibit potent anti-inflammatory effects and alleviate clinical symptoms of atopic eczema. Journal of dermatological science 88.1 (2017): 67-77. (link)
Manayi, Azadeh, Mahdi Vazirian, and Soodabeh Saeidnia. Echinacea purpurea: Pharmacology, phytochemistry and analysis methods. Pharmacognosy reviews 9.17 (2015): 63. (link)
Gilroy, Christine M., et al. Echinacea and truth in labeling. Archives of Internal Medicine 163.6 (2003): 699-704. (link)
Manayi, Azadeh, Mahdi Vazirian, and Soodabeh Saeidnia. Echinacea purpurea: Pharmacology, phytochemistry and analysis methods. Pharmacognosy reviews 9.17 (2015): 63. (link)