Patricia Kyritsi Howell, RH(AHG)

Honoring Our Legacy, Embracing the Future: 37 Years of the American Herbalists Guild

Patricia Kyritsi Howell, RH(AHG), an herbalist who calls the mountains of northeast Georgia home, is the author of Medicinal Plants of the Southern Appalachians: Second Edition.

Her work celebrates regional herbalism, especially the many medicinal plants found in the Southern Appalachians, where she led the BotanoLogos School of Herbal Studies for three decades. Her family has roots in the Greek island of Crete, where she hosts plant-centered tours each spring. There, she and her guests experience native aromatic medicinal plants, forage for wild greens, savor traditional Cretan cuisine, and learn about the island’s rich culture and history.

Through her virtual course, Crafting Your Herbal Practice, Patricia teams up with Kat Maier to support both new and seasoned herbal practitioners in establishing successful, sustainable clinical practices.

Patricia has been a Registered Herbalist with the AHG since 1997 and, once again, finds herself supporting the Guild’s mission as the AHG Admissions Coordinator.

Adam Bigelow

Herbaceous Perennial Wildflowers (Plant Walk)
Shrubs, Trees, and Woody Vines (Plant Walk)

Adam Bigelow is a horticulturist and botanist who lives in Cullowhee, NC, and has been studying the plants and wildflowers of Southern Appalachia for over 20 years. Adam operates Bigelow’s Botanical Excursions, an eco-tour business leading guided plant walks in WNC. He is the author of The Joyful Botanist column for the Smoky Mountain News. An avid organic gardener he is the founder of the Cullowhee Community Garden. Adam is a member of the planning committee for the Cullowhee Native Plant Conference, among the largest and oldest Native Plant conferences in the country and has attended the conference for many years. Adam lives in Cullowhee at 3,600 ft surrounded by Native Plants and Wildflowers with his cats Hazel Alder, Silky Willow, and Cat Briar.

Lindsay Chimileski, ND, MS, RH(AHG)

Beyond Suppression: Fungi & Botanical Strategies for Autoimmunity and Inflammation
Medicines That Shift Perception: Psychedelics, Consciousness, and the Mind–Body Interface in Autoimmunity and Inflammation

Dr. Lindsay Chimileski, ND, MS, RH(AHG), is a Connecticut-licensed naturopathic doctor, acupuncture specialist, and registered herbalist with over a decade of clinical experience. She is the founder of Hawthorn Holistic Health, where she offers an integrative, patient-centered approach that combines botanical medicine, functional lab testing, acupuncture, nutrition, and lifestyle care.

Her work is grounded in a root-cause philosophy, with a focus on immune health, chronic inflammatory conditions, and nervous system regulation. Dr. Chimileski is known for weaving together evidence-informed clinical practice with traditional herbal and mushroom medicine, supporting patients in reconnecting with their body’s innate capacity for healing. She places a strong emphasis on working with plants in their traditional forms—teas, tinctures, and flower essences—while maintaining discernment around the quality and sourcing of modern supplements.

In addition to her clinical work, she has extensive experience lecturing at conferences and educational gatherings, including Mycofest, the American Herbalists Guild Symposium, Medicines of the Earth Symposium, and state and national naturopathic associations. She has taught botanical medicine and nutrition at the University of Bridgeport College of Naturopathic Medicine and continues to lead workshops, lectures, and immersive educational experiences centered on plant medicine and holistic health.

Lauren Eadline, FNP-C, APHN-BC, RH (AHG)

Healing Connections: Plant-Forward Protocols for the Hypermobility Syndromes & their Co-Morbidities

Lauren Eadline is a consulting medical provider, clinical herbalist and plant medicine educator in Central New York. She maintains a small medical practice in Homer, NY where she specializes in complex medical conditions, gender and reproductive care, and herbal & nutritional medicine. About 75% of her practice relates to hypermobile conditions and their comorbidities. She is also the founder and director of Syracuse Herbal Study Group, a collective in the CNY area focused on accessible education in herbal medicine, community health empowerment and mutual aid initiatives. She is a board-certified Advanced Practice Holistic Nurse (APHN), a registered member of the American Herbalist Guild and has spoken at conferences nationwide on topics in botanical medicine and complex disease. Lauren lives in Homer, NY with her family.

Thomas Easley, RH(AHG)

Autoimmunity IRL: Stories from the ESHM Clinic
The Body Is Not at War With Itself

Thomas Easley is a Registered Herbalist, co-author of The Modern Herbal Dispensatory, and founder of the Eclectic School of Herbal Medicine. He has practiced clinical herbalism for more than twenty-five years, and has run a comprehensive clinical training program for fifteen years. That clinic is the heart of what ESHM does. Students see real folks, work through real cases, and learn that good clinical western herbalism is patient, humble, and rooted in conservative interventions that empower.

He is currently opening Three Notch Community Health in Andalusia, Alabama, a membership-based clinic and movement studio designed to make ongoing herbal care affordable inside a small community. He also operates Eclectica Botanica, a compounding apothecary serving practitioners and their clients.

Thomas writes regularly on the philosophy and history of clinical herbalism, including a Substack series that applies philosophy-of-science frameworks to the alternative-versus-mainstream binary in medicine.

Patrick Fratellone, RH(AHG)

Bee Venom Therapy and Chronic Diseases
Integrative Treatments for Lyme Disease

Dr. Fratellone’s guiding philosophy is an individualized approach to total health and well-being that results from nurturing the intrinsic healing of the whole person. He is guided by his personal mission to serve, empower and partner with his patients and community on the path to wellness, transformation, and wholeness.

Prior to forming Fratellone Medical Associates, Dr. Fratellone was Chief of Medicine and Director of Cardiology at the Atkins Center for Complementary Medicine under the direction of the late Robert C. Atkins, M.D. Previously, he held positions as Medical Director of the Fifth Avenue Comprehensive Medical Group and Regional Director of Cardiology programs for the Ultrasound Diagnostic Schools. As a result of his development of programs and teaching in these positions, he is recognized as a forerunner in the field of echocardiography.

Dr. Fratellone completed his B.S. and B.A. in Biology and Humanities, respectively, at the State University of Stony Brook (New York) in 1982. He completed his medical training in London, where he broadened both his clinical and bedside skills. Dr. Fratellone finished his medical residency at Lenox Hill Hospital, in New York City, where he also pursued and completed his Fellowship in Cardiovascular Disease in 1994. During his three-year fellowship, he trained at the Nicholas Institute Sports Medicine and Athletic Trauma at Lenox Hill Hospital in New York City and the Division of Congenital Heart Diseases at the University of California at Los Angeles.

Dr. Fratellone has been an adjunct professor at the University of Bridgeport College of Naturopathic Medicine since 2014.

Camille Freeman, RH(AHG), DCN

POTS in Practice: A Clinical Framework (INT)

Camille Freeman, DCN, RH, has been in practice as an herbalist and nutritionist since 2003, with a focus on fertility, pregnancy, and menstrual health. She holds a doctorate in clinical nutrition and a master’s in herbal medicine from MUIH (now part of Notre Dame of Maryland), as well as a master’s in physiology from Georgetown University.

Camille runs Monday Mentoring, a community of practice for herbalists and nutritionists, and is the author of Write Better Newsletters: Grow Your Practice with Emails People Actually Want to Read. She also hosts the podcast In the Clinic with Camille (intheclinic.com). You can learn more about Camille on her website: camillefreeman.com.

Iya Angelique “Sobande” Greer

Bitter Medicine and Sacred Digestion: Traditional Herbal Approaches to Inflammation, Gut Health & Emotional Holding
The Healer Must Also Heal: Herbal Regulation, Burnout Prevention & Spiritual Restoration for Practitioners

Iya Angelique “Sobande” Greer, a generational Herbalist, Holistic Nutritionist, and Wellness Strategist, based in the Kentucky-Tennessee region. She is also a Desert Storm Veteran of the United States Army. In 1992 she made history by founding the first African American School of Herbalism in the United States – The NCB School of Herbalism & Holistic Health, as well as the first herbal botanica & health food store in the city of Clarksville TN.

In addition to her foundational work, Iya Sobande is the visionary powerhouse behind several transformative initiatives. These include the Sacred Waters Retreat, Cook Cure & Conjure, Legacy Tea Blends, and The Afro Botany Immersion Conference. Each of these sacred projects reflects her commitment to holistic health, cultural heritage, and spiritual growth.

Iya Sobande’s academic credentials are equally impressive. She is a proud graduate of Austin Peay State University, where she earned undergraduate degrees in Communications, Public Relations, and Health & Nutrition. Furthering her expertise, she is a Certified Natural Health Professional with the Trinity School of Natural Health. She also holds the title of Holistic Health Consultant from the International Board of African Thinkers & Healers Inc., and the Ghana Traditional Healers Association, under the guidance of the late world-renowned mentor and family friend Dr. Llaila O. Afrika ND.

Over the past 30 years, Iya Sobande’s contributions to the field of holistic health have been widely recognized. Her products, services, workshops, and literary publications have been featured in esteemed platforms such as Traditional Medicinals’ “Female Trailblazers of American Herbalism”, Black Enterprise Magazine, The Country Music Awards Association, Urban Network Magazine, and the National Coffee & Tea Trade Journal. She has also been listed in Who’s Who in Alternative Healthcare and has been a guest on a variety of radio shows, podcasts, and other publications.

Iya Sobande’s work extends beyond borders. She has traveled the globe, lecturing, and presenting workshops and rituals on herbal medicine from both a historical and spiritual perspective. Her passion for healing and education continues to inspire and transform lives around the world.

Iya Sobande’s work has had a profound impact on marginalized communities, as she has provided a platform for the study and practice of Indigenous African Earth Medicine. This has opened opportunities for individuals from these communities to access and learn about traditional healing practices through the various initiatives. Iya Sobande continues to create safe spaces for learning, healing, and community building. Her platforms not only provide education and resources but also foster a sense of belonging and empowerment among participants for generations to come.

Maria Noël Groves, RH(AHG)

Herbal & Holistic Support for Hypothyroid & Hashimoto’s
The How and Why of Gut Healing

Maria Noël Groves, RH(AHG), clinical herbalist, runs Wintergreen Botanicals Herbal Clinic and Education Center, nestled in the pine forests of New Hampshire. A practicing herbalist for more than two decades, she practices Western herbalism with an emphasis on local and common herbs, actions, energetics, and A&P. She’s the author of the award-winning, best-selling Body into Balance: An Herbal Guide to Holistic Self Care, Grow Your Own Herbal Remedies, Herbal Remedies for Sleep, Herbal Gut Health, and an additional forthcoming book. She has taught herbalism nationwide and internationally via her herb school and as a guest teacher for various schools, conferences, and professional organizations including the AHG, International Herb Symposium, Maryland University of Integrative Health, Massachusetts College of Pharmacy, and Herbal Academy.

Mimi Hernandez, M.S., RH (AHG)

Botanical Allies for the Post Menopausal Landscape

Mimi Prunella Hernandez, M.S., R.H. (AHG), is a clinical herbalist with a master’s degree in herbal medicine. As a Registered Herbalist with the American Herbalists Guild, she has mentored students in clinical and community herbalism through various educational platforms. Mimi is known for her ability to explain complex information in a relatable way, which has gained her a dedicated following. Her warm and approachable nature has made her a sought-after speaker at conferences and events.

In 2023, Mimi received a Botanical Excellence Award from the American Botanical Council, a prestigious honor that recognizes her as a Mark Blumenthal Herbal Community Builder. For over a decade, Mimi served as the executive director of the American Herbalists Guild, where she worked tirelessly to ensure that herbalists have a strong professional community to support their work.

Mimi’s volunteer work inspires plant sanctuary dreamers. She not only strives to ensure the continued availability of native and medicinal plants but also educates others about their importance and traditional uses. With her husband Terry she stewards The PonderLand Native Plant Sanctuary and inspires others to consider establishing plant sanctuaries in their communities.

Mimi’s herbal roots are inspired by her Colombian and Mexican Grandmothers via a Latin American Folk Herbalism and Curanderismo lineage. While Mimi finds immense joy in practicing kitchen herbalism, she finds tremendous fulfillment in delivering herbal house calls. She loves delivering baskets filled with homemade nourishing goodies, using the herbs she grows in her garden to provide natural remedies to those in need.

Feather Jones, RH(AHG)

Herbal Pairings in Chronic Disease Formulas
Systemic Inflammation and Chronic Pain Management

Feather Jones has been immersed in the world of herbal medicine since the early 80s. With over four decades of experience working with clients and teaching, she brings a rich and grounded perspective to the classroom—blending clinical insight, traditional wisdom, and a deep connection to the natural world.

As a Registered Herbalist with the American Herbalists Guild, Feather’s work is rooted in both science and spirit. She has studied extensively with respected herbal mentors and traditional women healers, continuously refining her practice to meet the unique needs of each individual. Her approach is intuitive, practical, and steeped in experience.

Feather is a passionate outdoor herbalist who thrives on guiding others through the wild landscapes of plant medicine. Whether she’s leading a field walk, sharing plant stories by a campfire, or offering insights from years of clinical work, her teachings inspire students to build meaningful relationships with plants and the land.

For over 20 years she lead herb walks and field studies in the Sonoran Desert and the Colorado Rocky Mountains for the Sonoran University (Southwest College of Naturopathic Medicine) and with her school, the Rocky Mountain Center for Botanical Studies for 11 years, where she and her staff of professional herbalists from all over the country, graduated over 400 intermediate and advanced students in Western Clinical Herbalism.

She now shares this wealth of herbal knowledge through immersive programs, field studies, and mentorship—offering students a chance to connect deeply with the healing power of herbal medicine.

Janet Kent

Care for the Caregiver: Addressing Burnout in Care Work
Medicinal Plants of Southern Appalachia (Plant Walk)

Janet Kent is a community and clinical herbalist, educator, and writer. She grew up in the foothills of the Blue Ridge Mountains immersed in the rich biodiversity of Southern Appalachia. She began studying the medicinal uses of plants when she moved to an ecologically rich Appalachian hardwood cove high in the mountains of Madison County, North Carolina 25 years ago. She lives there off-the-grid in her hand-built home where she maintains an ever-growing herbal apothecary and garden of medicinal and native plants. She is co-founder of the Terra Sylva School of Botanical Medicine. In the past decade, she has focused on herbal approaches to mental health and has published two booklets, Ease Your Mind: Herbs for Mental Health and Under Pressure: Herbs for Resilience. Janet shares her writing on herbalism and health politics in the Radical Vitalism newsletter on substack.

Duncan Lynch, ND, RH(AHG)

The Horn of the Forest: Devil’s Club and Oregon Grape as PNW Root Medicines

Duncan Lynch, ND, RH(AHG) is a naturopathic physician and registered herbalist. He graduated from Bastyr University in 2021 with a Doctorate in Naturopathic Medicine, completed a 2-year integrative residency, and is now practicing naturopathic medicine and clinical herbalism in Bellevue, WA.

Cultivating healthy relationships with plants underlies Dr. Lynch’s approach to herbalism. In naturopathic practice he most often prescribes and formulates tinctures and salves when treating acute and chronic conditions, but utilizes other preparations as well when appropriate.

He has previously lectured with the American Herbalists Guild as well as other herbal and naturopathic organizations, focusing on topics including herbal medicine in pain management, herbal medicine for common medical conditions, and the use of low dose herbs in clinical practice.

Erica Macrum

Early Morning Bonus – Qi Gong for Health and Vitality (Sat AM 7–8am)
Early Morning Bonus – Healing Sounds & Smiling Organ Meditation (Sun AM 7–8am)
The Five Spirits in Chronic Disease: Bridging Emotional and Physiological Outcomes

Erica Macrum is an East–West clinical herbalist, educator, and founder of Sweet Fern Apothecary. Her work bridges Classical Chinese Medicine with Western herbal traditions, with a focus on treating complex, chronic conditions through a holistic, pattern-based approach.

She began her studies in 2004 as a Zen Shiatsu practitioner, which led to extensive training in Chinese medicine theory, bodywork, and Qi Gong. Erica went on to train as a teacher of Zen Shiatsu, teaching in her region while continuing advanced study in classical philosophy and clinical application.

She is a graduate of the East West School of Planetary Herbology, where she studied under Michael and Lesley Tierra, completing her training in 2021. She continued in advanced mentorship with Susan Kramer for two years, during which time she also supported the program as a case study instructor and seminar teacher for advanced students.

Erica maintains a clinical practice and is the owner of Sweet Fern Apothecary, where she formulates with regional herbal medicines and teaches classes, plant walks, and clinical education. She has presented at regional events, including the Great Lakes Herb Faire, where she led an intensive on tongue diagnosis.

Kat Maier, RH(AHG)

Deep in the Tissues: Autoimmune Disease

Kat Maier, RH (AHG), PA has been a practicing herbalist for over forty years. She is the founder and director of Sacred Plant Traditions, LLC in Charlottesville, VA. She served as President of the Board of United Plant Savers and received their first Medicinal Plant Conservation Award. As a clinical herbalist, she has taught at medical schools, Naturopathic symposiums, and internationally at herbal conferences.

As a former Peace Corps volunteer in Chile, coupled with her training as a Physician’s Assistant, she weaves the language of biomedicine with traditional energetic systems and wisdom. Kat served on the Admissions Committee for American Herbalist Guild (AHG) for professional membership for over ten years. She is the founder of Botanica Mobile Clinic, which offers support to mental health and at-risk community members at no cost. Kat is the co-author of Bush Medicine of San Salvador Island, Bahamas, and the author of Energetic Herbalism: A Guide to Sacred Plant Traditions, Integrating Elements of Vitalism, Ayurveda, and Chinese Medicine. This book won the 2022 Gold Medal Nautilus Award.

Dave Meesters

Making Sense of Mast Cell and Histamine Presentations: Differentiating Complex Reactivity

Dave Meesters is a clinical herbalist, educator, and writer based in the mountains of western North Carolina. He co-directs the Terra Sylva School of Botanical Medicine and practices at the River Island Community Herb Clinic, a low-cost clinic serving Appalachian communities in Madison County and beyond. Chronic illness, immune dysregulation, digestion, sleep, stress, and neurodivergence have become organizing centers of his clinical work.

Dave has been part of grassroots herbal health infrastructure for over two decades, co-founding the Sassafras Community Health Collective and a post-Katrina free clinic in New Orleans. He serves on the board of Mountain Gardens and is active in the mutual aid collective Rural Organizing and Resilience.

He writes the Radical Vitalism newsletter alongside Janet Kent, where he explores the cultural, political, and philosophical dimensions of herbalism—what it means to practice plant medicine at this moment in history. His work asks what herbalism is for, how it works, who it serves, and how it might meet the crises of our time.

Dave lives off the grid in a rich Appalachian cove, where he spends his free time botanizing and birdwatching.

Betsy Miller, MS, CNS, RH(AHG)

Botanicals & Nutrition in the Management of Endometriosis (INT)
Dance of the Hormones: Navigating PMOS (INT)

Betsy is a clinical herbalist and Certified Nutrition Specialist practicing in the Northern Virginia area. She specializes in women’s reproductive health, and partners with a local midwifery practice to support their pre- and postnatal clients through nutrition and herbs. In addition to her clinical practice, Betsy is adjunct faculty at the Notre Dame of Maryland University (formerly MUIH/TAI Sophia), where she teaches Herbal Pharmacy, Materia Medica and Sustainable Botanical Supply Chains.

Lupo Passero

Relational Herbalism in Practice: Clinical Outcomes Through Plant Connection

Lupo Passero is a Clinical and Community Herbalist with over 25 years of experience in botanical medicine, as well as a Flower Essence Practitioner and founder of Twin Star Herbal Education & Community Apothecary (est. 2009). Her work is rooted in clinical practice, where she has supported a wide range of clients using individualized, plant-based protocols grounded in traditional and contemporary Western herbalism.

In addition to her private practice, Lupo leads a clinical training program through Twin Star, mentoring the next generation of herbalists in hands-on assessment, formulation, and client care. Her teaching emphasizes both practical clinical skills and the importance of accessibility and ethics in herbal medicine.

Lupo is deeply committed to community care and mutual aid. She has organized and participated in grassroots herbal clinics, offering free and low-cost support, particularly in response to natural disasters and times of crisis. Her approach bridges clinical herbalism with community-based healing, ensuring that plant medicine remains accessible to those most in need.

Sajah Popham

Immunomodulating and Amphoteric Materia Medica
The Medical Astrology of Autoimmunity

Sajah Popham is the author of Evolutionary Herbalism, and founder of Natura Sophia Spagyrics, and the School of Evolutionary Herbalism. He trains herbalists in a holistic system of plant medicine that encompasses clinical Western herbalism, medical astrology, Ayurveda, and spagyric alchemy.

His comprehensive approach focuses on balancing the science and spirit of plant medicine to heal the body, clarify the mind, open the heart, and support the development of the soul. This is achieved through working with the chemical, energetic, and spiritual properties of the plants to heal the whole person. His teachings embody a heartfelt respect, honor and reverence for the vast intelligence of plants in a way that empowers us to look deeper into the nature of our medicines and ourselves.

He lives on a homestead in the foothills of Mt. Baker Washington with his wife and children where he teaches, consults clients, and prepares spagyric herbal medicines.

Lyani Powers

Ritual is Regulation: Herbal and Ancestral Approaches to Nervous System Care
The Common Denominator: Understanding Postpartum Through a Global Herbal Lens

Lyani has studied clinical herbalism and ethnobotany since she was a child. Starting under the skirts of both grandmothers by watching how they farmed and used plants to create remedies. Lyani grew up listening to her elders speak of what plant works for what ailment and how to treat and soothe others aches and pains. When Lyani was diagnosed with MS, she was motivated to learn more about additional avenues of healing for myself and others. Though her personal journey to health, Lyani met inspiring and remarkably intelligent healers including nutritionists, naturopaths, and medical physicians. What she learned was invaluable, so much so, she wanted to learn even more.

Lyani dove headfirst into numerous courses, curriculums, and apprenticeships. She completed her studies in Clinical Herbalism, where she studied under Arbor Vitae School in New York founder, Richard Mandelbaum. After that program, she completed the Rosemary Gladstar Herbal Education Program. She went on to complete additional certifications in Pregnancy, Postpartum and Nutrition through Glow Maven and Divine Birth Wisdom. Her Ayurvedic Postpartum Doula Certification is from The Newborn Collective. She is also a CLC, Certified Lactation Consultant. The process of learning never stops for Lyani as she continues to explore the endless depths of wellness through nutrition and holistic care.

Lyani is a clinical herbalist, doula, and birth worker whose practice bridges ancestral traditions and modern care. She founded Modern Herbal Apothecary and Modern Herbal Academy and authored Rooted and The Little Herbalist Guide for Kids.

Gina Rivers

Hands on Reishi Double Extraction Workshop

Gina Rivers is an herbalist, formulator, and educator with over 15 years of experience in clinical practice, product development, and professional education. She currently serves as a science educator and formulator for an internationally recognized mushroom supplement company, where she works with renowned mycologist Paul Stamets. In this role, Gina has delivered extensive trainings across the U.S. and internationally, educating practitioners, retailers, and the public on the therapeutic applications of medicinal mushrooms.

A seasoned speaker, Gina has presented at numerous herbal and integrative health conferences, as well as leading educational programs throughout her tenure with Host Defense. She is also the founder of River ‘Seng MycoHerbalism, a clinical practice focused on integrating mushrooms, botanicals, nutrition, and lifestyle strategies to support balanced, resilient health.

Gina’s path in herbalism began early through apprenticeship with a German naturopath in Birmingham, Alabama, and continued alongside her nursing studies. Her formal training includes Dr. Christopher’s School of Natural Healing, The Natural Healing College, UAB School of Nursing, and additional studies with Dr. Jan McBarron, MD, ND, and Clayton College.

Marc Williams

Plant Family Patterns: The Key to See (Plant Walk)
Woody Ethnobotany Walk (Plant Walk)

Ethnobiologist marc williams has taught hundreds of classes to thousands of people about plants, humans, other life forms and their interface. His training includes a B.A. in Environmental Studies/Sustainable Agriculture from Warren Wilson College with a minor in Business and a M.A. in Appalachian Studies/Sustainable Development from Appalachian State University with a minor in Planning/Geography. He has over 25 years of experiences working at various restaurants, farms, and travels throughout 31 countries in Central/North/South America, Europe and all 50 states in the USA. More information can be found at www.botanyeveryday.com and www.plantsandhealers.org.

David Winston, RH(AHG)

A Walk on the Wild Side (Plant Walk)
Herbal and Nutritional Approaches to Autoimmune Disease and Allergies

David Winston is an Herbalist and Ethnobotanist with 58 years of training in Chinese, Western/Eclectic and Southeastern herbal traditions. He has been in clinical practice for 50 years and is an herbal consultant to physicians, herbalists and researchers throughout the USA, Europe and Canada. David is the founder/director of the Herbal Therapeutics Research Library and the dean of David Winston’s Center for Herbal Studies, a two-year training program in clinical herbal medicine. He is an internationally known lecturer and frequently teaches at medical schools, professional symposia and herb conferences. He is the president of Herbalist & Alchemist, Inc. a manufacturer that produces herbal products that blend the art and science of the world’s great herbal traditions.

In addition, David is a founding/professional member of the American Herbalist Guild, and he is on the American Botanical Council and the American Herbal Pharmacopoeia Advisory Boards. He was a contributing author to American Herbalism, published in 1992 by Crossings Press, and the American Herbal Pharmacopoeia (AHP), 2000-2018, the author of Saw Palmetto for Men & Women, Storey, 1999 and Herbal Therapeutics, Specific Indications For Herbs & Herbal Formulas, HTRL, 2024 (14th edition) and the primary author of Adaptogens: Herbs for Strength, Stamina and Stress Relief, Healing Arts Press, 2007 & 2019 2nd Ed, and Winston and Kuhn’s Herbal Therapy and Supplements; A Scientific and Traditional Approach, Wolters Kluwer/Lippincott, 2008. David has also published hundreds of articles in medical and botanical medicine journals and conference proceedings. He is also a member of the AHPA Expert Advisory Council that created the second edition of the Botanical Safety Handbook, CRC Press, published in 2013 (3rd edition in press).

In 2011 David along with 9 other members of the Botanical Safety Handbook expert advisory committee were recipients of the AHPA Herbal Insights award. In 2013 he received the Natural Products Association Clinicians award and was awarded a fellowship by the Irish Register of Herbalists. In 2018 he was the Mitchell visiting scholar at Bastyr University, in 2019 he was awarded an honorary DSc degree from the National University of Natural Medicine (NUNM) in Portland, OR, in 2023 he was awarded the AHPA Herbal Insight award recognizing his over 50 years of educating people about herbal medicine and in 2024 he was given the American Botanical Council’s Mark Blumenthal Herbal Community Builder award.