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Whatever happens, we know your merits in our hearts!

Email received from Univ.-Prof. Dr. Michael FRASS (Austria) on September 9, 2025

Creating Synthesis was arguably one of the most important parts of Frederik Schroyens' life's work to digitalize homeopathic practice.
From 1987 through Synthesis Adonis, 13 software versions of Synthesis were released. Tens of thousands of homeopaths find inspiration for their prescriptions in it.
The number of users of the printed versions is, if possible, even greater.

Thanks in part to the loyal collaborators, Synthesis has become the gold standard in the field and has touched the lives of millions of patients.

Below are some testimonials about Synthesis and Frederik Schroyens' relevance to this project.
By clicking on a quote, you can read the full testimonial.
If you would like to share your personal appreciation, please send your testimonial to this email address.

"Synthesis is Dr. Schroyens’ most original contribution ... to improving people's health and quality of life."
Prof. Dr. Claudio C. ARAUJO, Brazil, MD FFHom

"The authorship of the Synthesis rests unequivocally with Frederik Schroyens, ... for most homeopaths they are regarded as synonyms."
Andreas BJØRNDAL, Norway, MSc NAN MNHL

"The Synthesis Repertory created by Frederik Schroyens has been an essential companion in my daily clinical work."
Dr. Marc L. CLAPERS VIDAL, Spain, MD

"A huge debt of gratitude for all the work ... since the publication of the first Synthesis "
Dr. Philippe DEVOS, Belgium, MD
for the Unio Homeopathica Belgica, Belgium

"For all of us, Synthesis was and is associated with Frederik Schroyens since always."
Dr. Suzanne DIEZ, Austria, MD
for the Austrian Society for Homeopathic Medicine, Austria

"Dr. Frederik Schroyens is undeniably the author and editor-in-chief of the Synthesis Repertory."
Marcus FERNANDEZ, England, RSHom FSHom

"Synthesis is ... the life's work of Frederik Schroyens as its author, as is generally known."
Dr. Bertold FLEIG, Germany, DTM & H (London)

"From the very beginning it was known to us that the "Synthesis" repertory was created by Dr. Frederik Schroyens."
Peter & Edeltraud FRIEDRICH, Germany

"[Dr. Schroyens] holds a distinguished place in the history of homeopathy as the creator and author of Synthesis."
Tomer HAREL, Israel, RCHom

"Already at that time I understood what tremendous work Frederik had done to create Synthesis."
Gunnar JANSSON, Sweden

"His life’s work has been devoted to building and maintaining the Synthesis Repertory."
Dr. Linda JOHNSTON, USA, MD, DHt

 “Dr Schroyens … is held in the highest regard by his colleagues.
Dr. Lee KAYNE, Scotland, PhD MRPharmS FFHom, President
for the Faculty of Homeopathy, United Kingdom

"One of the most significant advances in homoeopathic literature ... was the introduction of ... Synthesis ... by Dr. Frederik Schroyens."
Dr. Steven KAYNE, Scotland, PhD MBA LLM(Medical Law) MSc(Medical Science) DVetPharm FRPharmS FFHom

"His work, Synthesis Repertory, stands as one of the most ... academically reliable repertories available today."
Prof. Dr. Sathish KUMAR, India, MD(Hom)

"Dr. Frederik Schroyens has dedicated his services solely to the development of the Synthesis repertory."
Prof. Dr. Farokh J. MASTER, India, MD PhD CCMP FFHom

"You have contributed ...through your lifelong dedication ...as the creator and author of Synthesis."
Dr. Demosthenes PAPAMETHODIOU, Greece, MD, President
for the Hellenic Homeopathic Medical Society, Greece

"Dr. Schroyens ... is the originator, the essence, and the guiding spirit of this repertory [Synthesis]."
Prof. Dr. Amorn PREMGAMONE, Thailand, MD PhD, President
for the Homoeopathic Association of Thailand, Thailand

"[I] confirm the community-wide respect for Dr Schroyens ... his authorship of Synthesis and his pivotal role in its development."
Dr. David REILLY, Scotland, FRCP MRCGP FFHom DSc(Hon)

"As its author and custodian, you have invested almost your whole life in creating, refining, and nurturing [Synthesis]".
Dr. Rajan SANKARAN, India, MD(Hom)

"Every teacher of Repertory knows that Synthesis was authored by Dr. Frederik Schroyens."
Prof. Dr. Sashi Kant TIWARI, India, DMS NIH(Govt. India) MD(Hom)

"His personal effort to create [Synthesis] ... is unique and has few peers."
Peter TUMMINELLO, Australia, ND

"Frederik had completed invaluable work with RadarOpus, and especially with Synthesis."
Dr. Natalia TZIMA, Greece, MD MSc(Pharm) PhD

"Frederik possesses both qualities of expertise and experience in abundance."
Frans VERMEULEN, USA

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