About Us

We prioritize radical transparency and safety by utilizing clinically proven dosages and disclosing the precise origin of every ingredient, empowering you to maintain balance and health every day.

Meet our medical team

Daniel Kaufman

Daniel Kaufman

President & Advocate

An award-winning director, screenwriter, and storyteller, Daniel brings the mission... An award-winning director, screenwriter, and storyteller, Daniel brings the mission of Circady to the world. With a career built on authentic human narratives, from documentaries to major brand campaigns, he knows how to make complex truths land. At Circady, he's the voice ensuring that what our doctors know reaches the people who need it most.
Dr. Alf Fischbein, MD

Dr. Alf Fischbein, MD

Chief Medical Officer

A graduate of the University of Lund, Sweden, Dr. Fischbein... A graduate of the University of Lund, Sweden, Dr. Fischbein spent two decades as Associate Professor at Mount Sinai School of Medicine in New York. An international authority in Occupational and Environmental Health, he has served on expert committees for the EPA, the International Labour Office in Geneva, and the International Federation of Metalworkers. He has pioneered diagnostic innovation in toxicology — bringing that same precision to how Circady validates every ingredient we use.
Dr. Herman Weiss, MD MBA

Dr. Herman Weiss, MD MBA

Head of Women's Health & PCOS

Trained at Einstein/Montefiore in New York and practicing in Israel... Trained at Einstein/Montefiore in New York and practicing in Israel for over 15 years, Dr. Weiss is one of the most recognized OBGYN specialists in hormonal disorders and PCOS. With an MD from Ohio State and an MBA from George Washington University, he combines deep clinical experience with a holistic philosophy — helping women regain control of their ovarian health for over two decades. He co-founded FibroControl and actively consults on PCOS treatment worldwide.
Dr. Omar Saeed, PhD

Dr. Omar Saeed, PhD

Product Innovation

A pharmacological researcher with a PhD in pharmacology and deep... A pharmacological researcher with a PhD in pharmacology and deep roots in natural medicine, Dr. Saeed leads a pioneering natural therapeutics company in Kufr Kanna, Israel. He has spent his career integrating clinical pharmacological science with plant-based compounds — the exact intersection that defines every Circady formula. His work ensures that "natural" at Circady means rigorously tested, not just label-friendly.
Mike Teiler

Mike Teiler

Head of Product

A seasoned pharmaceutical strategist with deep expertise in portfolio management... A seasoned pharmaceutical strategist with deep expertise in portfolio management and drug development, Mike spent years at the highest levels of global pharma — including Teva International — before turning his focus to natural medicine. As Chief Pharmaceutical Officer at LeviCure, he led cutting-edge research into reversing Type 1 Diabetes. At Circady, he bridges rigorous pharmaceutical standards with the world of natural formulation.
Rebeca Briceño Robaugh

Rebeca Briceño Robaugh

Clinical Data Strategist

Rebeca Briceño-Robaugh is a data-driven health innovation leader with a... Rebeca Briceño-Robaugh is a data-driven health innovation leader with a decade of experience at USAID, where she led initiatives at the intersection of global health security and evidence-based intervention design. A passionate advocate for precision health, Rebeca brings deep expertise in clinical methodology and real-world data analytics, translating complex datasets into actionable clinical insights. Currently serving as Ambassador for PMOS and PCOS initiatives at Circady Health, Rebeca uniquely bridges the gap between product development, rigorous clinical validation, and data science. Her work focuses on advancing women's reproductive health through data-informed solutions, ensuring that every therapeutic claim is grounded in clinical evidence and measurable outcomes. With a background in global health diplomacy and a relentless commitment to uncovering health disparities through data, Rebeca combines the rigor of clinical research with the agility of product innovation—championing a model where data literacy, clinical excellence, and user-centered design converge to solve persistent women's health challenges.

Radical Transparency

We believe in honest, clear communication. There are no hidden components or undisclosed processes in our formulations. You will always know exactly what goes into our products and the precise origin of every ingredient.

Clinically Proven Formulations

Our targeted clinical support is designed for real results. We use precise, research-verified dosages rather than unverified claims, providing evidence-based support for genuine wellbeing.

Patient-Centric Care

Whether you are facing specific health challenges or focused on maintaining healthy daily habits, our goal is to build trust, confidence, and empowerment through compassionate, measurable care.