Herbal Experts - Traditional Medicinals

Our Herbal Experts

Our company treasure trove of herb nerds...

We have the good fortune of working with some of the most renowned and respected herbal experts in their fields. From herbalists, chemists, and ethnobotanists to sourcing experts, teachers, and clinicians, our team takes great pride in their work. Whether they are formulating our herbal wellness products, seeking excellence in quality control, working on new sustainability initiatives, or educating and marketing to our customers, they represent a depth and expertise of herbal knowledge that is second to none. Read on to learn more about these key members of our team.


Katie Huggins
Vice President of Technical Services

If you want to understand Katie’s basic approach to life, all you need to do is read the bumper sticker that says, ” I am a tree hugging dirt worshiper.” Her interest in plants began in childhood, when she would spend time visiting the various plants in her backyard. Eventually, she went on to study plants through the lenses of a variety of scientific disciplines and through her work in the natural products industry.

Katie has been with us since 1997 and is definitely one of our preeminent herbal experts, as well as a key member of our management team. She has been responsible for developing our Quality Control testing laboratory and testing programs, as well as growing the QC department from a staff of 5 to 12. She’s been instrumental in our work to transition to mostly organic, pharmacopoeial ingredients. She’s also devoted time over the past number of years to an agricultural study of senna (the primary ingredient in our popular Smooth Move teas). Prior to her work with us, Katie spent a decade in the natural products industry at Celestial Seasonings and 4 Health.

Katie brings an exceptional level of knowledge and passion to her work in Technical Services, where she oversees our Quality Control, Legal & Regulatory, and Research & Development Departments. Katie’s advocacy for plants—whether that shows up in a commitment to pharmacopoeial standards, rigorous quality control processes, rational formulation approaches or sustainability efforts—has fundamentally influenced the culture of our organization and we are very grateful for her contributions.

When not in the lab, you can find Katie working in her organic garden, which she aspires to turn into a small scale farm, where she grows herbs, vegetables, flowers, fruit and nut trees on her urban lot.



Zoe Kissam
Associate Brand Manager and Herbalist

Like many of the herbalists at the company, Zoe discovered her passion for plants at an early age and was fascinated by weeds that grew in the garden. Her mother was a garden lover and indulged Zoe’s insatiable curiosity for the names of the plants. By the time she was six, she’d already, in her words, “found many of her plant friends,” especially Scarlet Pimpernel, Forget-me-Nots and Black Eyed Susans.

Our teas were a staple in her household and she experienced firsthand the benefits of herbs at that time, which fueled her continued interest in plants. She studied cultural and physical anthropology in college, and became passionate about learning about what makes people and cultures tick (she has been known to ask her marketing colleagues for their Myers-Briggs personality profile in order to work better with each person’s style).

Zoe obtained a BA in Cultural Anthropology while also beginning her career in the Natural Foods industry in 1999 at Whole Foods Market. There she worked with people, herbs and supplements. Zoe got really good at telling people how to use the the herbs and supplements she was selling, but wasn’t sure what those herbs looked like. Triggering that childhood curiosity, she became inspired to attend the California School of Herbal Studies from 2003-2004 and obtained a certificate as a Certified Clinical Herbalist.

After all those years drinking our teas, and even studying with one of our herbalists at the Herb School (as we call it around the company), Zoe joined our marketing team in 2006. She’s held a variety of marketing roles since then and currently serves as an Associate Brand Manager. She provides an important herbalist voice within the marketing department, often helping to bridge the herbalist and marketing worlds, so each can understand the other better. She currently leads the innovation/new product development process, manages all changes to packaging and serves as the marketing department’s herbal expert.



Josef A. Brinckmann
Research Fellow, Medicinal Plants and Botanical Supply Chain

Having a conversation with Josef is like reading an encyclopedia, a map of the world and a compilation of medicinal plant history all at the same time. An extremely knowledgeable and dedicated professional, as well as one of our key herbal experts, Josef has spent the past 37 years working in the global herbal medicinal products trade. Currently serving as our Research Fellow for medicinal plants, he spent the previous 5 years overseeing our Sustainability Department and 15 years before that overseeing our Research & Development Department, where he was responsible for formulation and scientific substantiation of our products.

Josef is very active in the herbal industry and his work with medicinal herbs extends beyond the confines of our tea company. He is a founding Board of Trustees member of the FairWild Foundation (FWF), an elected member of the United States Pharmacopoeia (USP) ‘Botanical Dietary Supplements and Herbal Medicines Expert Committee’, an Advisory Board member of the American Botanical Council (ABC), Advisory Committee member of the American Herbal Pharmacopoeia (AHP), and is a member of the Medicinal Plant Specialist Group (MPSG) of the International Union for Conservation of Nature (IUCN) Species Survival Commission (SSC).

Josef brings an intense rigor to his work and is a passionate champion for Traditional Herbal Medicine (THM) practices as well as sustainability initiatives. These, among many of his contributions, have had a deep and lasting influence on our culture.



Amber Valenzuela
Social Media Manager, Staff Clinical Herbalist

High atop the Rhodope mountains in a Bulgarian village just north of the Greek border is where Amber first discovered her inner herbalist. Stationed there as a Peace Corps volunteer, she was exposed to an entirely new world. A world where grandmothers (or babas) would take her into the forest – hunting for mushrooms after the rains, collecting St. John’s Wort under the summer sun, and gathering nuts in the fall, all to use as food or medicine. As an L.A. native, this was her first exposure to such a concept. To her, it was magical.

From that moment, there was no other choice but to discover the secrets within in her own homeland back in the United States and become a capsule of this traditional knowledge for her own community. That journey began when she moved to Sonoma County to attend the California School of Herbal Studies. After completing two certifications in Western Herbalism and Clinical Herbalism she blended her skills as a marketing professional. Amber’s passion and skills have supported several thriving herbal businesses in the county.

Her fascination with the natural world continues to unfold. The more she explores, the greater the questions. She is now a certified California Naturalist, novice-animal tracker, and mushroom hunter.

She currently uses all of those skills to bring to life the Traditional Medicinals spirit across our social media and Plant Power Journal.


Guido Masé RH (AHG)
Clinical herbalist, Senior Scientist

Guido is a clinician and herbal educator specializing in Western herbalism, though his approach is eclectic and draws upon many influences. He spent his childhood in Italy, in the central Alps where he first encountered medicinal plants, and in a Renaissance town called Ferrara. After traveling the United States, he settled into Vermont where he has been living since 1996. It was then he started his first herbal products business, making extracts from local botanicals gathered from the forest and a wild garden about an acre in size.

He co-founded the Vermont Center for Integrative Herbalism, a 501(c)(3) non-profit herbal medicine clinic and school that provides comprehensive services focused on whole plants and whole foods, and serves there as clinical supervisor and teacher in herbal pharmacology and therapeutics. He is a founding member of the Burlington Herb Clinic where he houses his clinical practice. He participates in herbal education at the University of Vermont, and is the author of The Wild Medicine Solution: Healing with Aromatic, Bitter and Tonic Plants (Healing Arts Press, 2013) and DIY Bitters (Fair Winds Press, 2016). A traveler since childhood, he has most recently worked to bridge the gap between traditional Maasai healers and modern medical practitioners at the Wasso District Hospital in Loliondo, Tanzania. At Traditional Medicinals his focus is on research, development, formulation and education for herbal teas, supplements, and Urban Moonshine bitters and tonics.

Guido’s style focuses on conveying the interconnections within the human organism and between the organism and its surrounding ecology. Relying on clinical experience, storytelling, and scientific research, he believes that true strength flows from nature, and that herbal medicine is key to sustainable, successful living.



David Hoffmann, B.Sc., F.N.I.M.H.
Medical Herbalist

David Hoffmann has traveled the world, run for Parliament on a Green Party ticket (yes, he’s English), and has been an activist in the Green and Peace movements for longer than he cares to remember. He is the author of 17 books, his latest is a textbook on science and clinical skills for phytotherapists entitled Medical Herbalism, published by Inner Traditions. These accomplishments aside, David, a Fellow of Britain’s National Institute of Medical Herbalists, has been a phytotherapist (that’s a practitioner of herbal medicine) for over 30 years.

David is passionate about plants. He promotes herbal medicine around the world, teaches at the California School of Herbal Studies, Bastyr University and the California Institute of Integral Studies, and, as previously mentioned, has authored many books about plants and plant medicine.

David’s extensive clinical and teaching experience bring a wonderfully human touch to the work we do with plants. His deep respect for the healing power and the mystery of plants coupled with his desire to share this knowledge with others is one of his great contributions to our culture and we are very honored to have him here with us.



Kirsten Tripplett

Kirsten’s interest in plants and animals became apparent when she was 3. She was dissecting hibiscus and phlox flowers by 6 and already wondering what chemicals make mints smell so good! Her innate curiosity led her to seek more information through her studies. She graduated from the College of the Atlantic, in Bar Harbor, Maine, with a B.A. in Human Ecology. She then went on to earn her Ph.D. in Mayan ethnobotany from the University of Texas, Austin (Botany), and to hold a post-doctoral research position in archaeological ethnobotany in the Department of Anthropology, University of California, Berkeley.

While managing a health food store before college, Kirsten discovered our teas (not to give her age away, but they were still sold in paper bags at that time) and thus began her self-described love affair with our teas. Later, her pursuit of ethnobotanical studies led Kirsten to the study of medicinal herbs in indigenous societies, all the while still drinking our teas. Kirsten harbored a small hope that she might work for us one day. And now, she finds herself contributing to Quality Control by serving as a Microscopist. Kirsten studies most of the herb ingredients that will be made into TM teas: she verifies the herb’s botanical identity and ingredients, using plant anatomical techniques and microscope technology. And she manages our new herbarium. Kirsten loves her job at TM, where she gets to be a science geek and work with plants. She often shares the amazing microscopic world of plants with us with photos that we post on our Facebook page or here on our web site.



Aisling Badger
Social Media for Urban Moonshine, Staff Clinical Herbalist

An avid outdoor lover, herbalist, artist and writer, Aisling works to voice the company mission of connecting the modern world to plant medicine through our social media and blog channels for both Traditional Medicinals and our sister brand, Urban Moonshine. Her deep love of and inspiration from the plant world began early on her family’s farm in remote northern New Hampshire, where her father is a naturalist and her mother an herbalist. Aisling earned a clinical certificate in Western, Ayurvedic and Chinese herbal medicine from the Vermont Center for Integrative Herbalism, and a bachelor’s degree in Health Science and Nutrition from Goddard College.

Through 10+ years of herbal study, Aisling has apprenticed with many well-respected herbalists, including Traditional Medicinals co-founder Rosemary Gladstar. Her herbal work and training have brought her to many parts of the world including ethnobotanical work in the rainforests of Washington, outdoor education in the forests of California, environmental and sustainability projects in Costa Rica, and clinical practice in rural Nicaragua. She continues to seek adventure and beauty in the work she does and is always looking for plant inspiration.
Aisling was drawn to Urban Moonshine’s mission of returning the use of herbal medicine to daily life, to bring it “out of the cupboard and onto the counter.” She joined the Urban Moonshine team in 2011 and is now also an integral part of the Traditional Medicinals marketing team.



Marisa Williams, ND, RH (AHG)
Senior Scientist

Marisa began collecting flowers, leaves, and seeds at the age of five, especially if a color or pattern intrigued her. This fascination with the natural world led her to study botanical medicine. She received her Bachelor of Science in Biology and her Master of Science in Biology/Botany from the University of Arkansas. Her Master’s thesis focused on phytochemical constituents and invasive plant ecology through her work on Perilla frutescens (L.) from the University of Arkansas.

She began her career as a Field Botanist and Herbarium Manager, driving across the state to various ecoregions; collecting, identifying and pressing specimens that would later become part of the Atlas of the Vascular Plants of Arkansas. At this time, she became absorbed with traditional uses of herbs and how herbal medicine influences human health. She went on to earn her Doctorate in Naturopathic Medicine from Southwest College of Naturopathic Medicine in Tempe, Arizona. She spent years empowering others as a Naturopathic Doctor through daily use of herbs and the wisdom of natural health in clinical practice. Marisa joined Traditional Medicinals in 2018 as our Senior Scientist and brings a unique expertise from her clinical and research backgrounds. She is part of our Research and Development Department team, where she provides guidance in medicinal plant research, botany, product development and herbal formulation to encourage positive change for the well-being of humans and plants.

When Marisa is not research or writing for the Research and Development Department she can be found hiking hills, identifying plants and birds, and exploring traditional medicinal, culinary, and natural dye uses of plants. She is inspired every day by how plants provide for all of us.



Thomas Brendler
Principal Scientist

Thomas started working with Traditional Medicinals in 2008, and in 2016 he became Principal Scientist in our Research and Development Department where his work focuses on medicinal plant research, product development, efficacy, safety, regulatory compliance, and claim substantiation. His primary consulting business, PlantaPhile®, has bases in the US and Europe, which focuses on all aspects of herbal product development, registration and licensing.

For over 25 years he has developed and managed projects on the use of plants in medicine, food and cosmetics. Thomas has been involved in the preparation, management and execution of various public funded research projects for the Millennium Challenge Corporation, the Centre for Development of Enterprise and the International Trade Centre. He co-founded the Association of African Medicinal Plants Standards in 2005 and served as one of its directors until 2018. Additionally, he is the editor-in-chief of the AAMPS African Herbal Pharmacopoeia and author of Herb-CD®, a digital encyclopedia of medicinal plants. Furthermore, Thomas has co-authored, edited and contributed to a wide range of publications on phytotherapy and regulations in the natural products industry, most notably Physician’s Desk Reference for Herbal Medicines, Medicinal and Aromatic Plants of Indian Ocean Islands, A Practical Guide To Licensing Herbal Medicinal Products, along with the translation into English of The Complete German Commission E Monographs on medicinal plants.

Beyond his work at Traditional Medicinals and as a published author, Thomas also serves as a member of the editorial boards of Phytotherapy Research and Journal of Ethnopharmacology, the advisory board for the American Botanical Council, consulting editor for HerbClips, member of the Botanical Dietary Supplements & Herbal Medicines Expert Committee of the United States Pharmacopeial Convention, and is a regular peer reviewer for a variety of scientific journals. In 2009 he spent a year as a visiting scholar at Rutgers University, Department of Plant Biology and Pathology within the Natural Product Research Group. Additionally, he is affiliated with the Department of Botany and Plant Biotechnology at the University of Johannesburg, South Africa.

When Thomas isn’t working as an author, collaborator, or colleague, he enjoys collecting (and reading) antique books and modern first editions, listening to all kinds of music, enjoying the arts, and tending to a garden full of useful plants and vegetables. During the garden’s dormant months, he travels extensively (lately with focus on Southern Africa, where he studies the fynbos flora while hiking Table Mountain), enjoys eating and drinking local plant-based products. From time to time, you might find him escaping into Namibia’s moon landscape for a day without plants altogether.