What registries and databases list ongoing or completed clinical trials for dietary supplements and how to search them for GlycoPezil?
Executive summary
ClinicalTrials.gov is the primary public registry where ongoing and completed clinical trials of dietary supplements are listed and searchable, complemented by domain-specific resources such as PubMed/NLM, the Natural Medicines Comprehensive Database, institutional trial portals (example: UC BRAID), and commercial trial directories or CRO pages [1] [2] [3] [4] [5]. The available reporting does not produce a verifiable ClinicalTrials.gov or indexed academic record for a product named “GlycoPezil”; promotional sites do exist for Glycopezil/Glycopezil™ but the public registries and bibliographic databases in the supplied sources contain no listing that matches that product name [6] [7] [1] [2].
1. ClinicalTrials.gov: the default, searchable repository for supplement trials
ClinicalTrials.gov is the central, publicly searchable registry for interventional and observational studies in the U.S. and internationally and explicitly includes trials of dietary supplements; users can query by condition, intervention, sponsor, or the free-text term “dietary supplements,” and apply status filters such as recruiting, completed, or not recruiting to narrow results [1] [8] [9]. The snippets supplied show multiple distinct trial records described as dietary supplement studies on ClinicalTrials.gov (NCT04605783, NCT05333315, NCT06655597) and a search URL dedicated to the dietary supplement term, demonstrating both the volume of supplement research and the practical ability to filter that corpus [8] [9] [10] [1].
2. Bibliographic and clinical-presentation databases: PubMed, NLM, and NCCIH context
Peer-reviewed clinical trials and trial registrations often appear in PubMed/NLM entries that cite ClinicalTrials.gov identifiers; for example, a dietary supplement cognitive trial lists its ClinicalTrials.gov registration number in the PubMed record [2]. The National Center for Complementary and Integrative Health (NCCIH) and related NLM resources curate summaries and links for natural-product human studies, which help place single trials into broader evidence reviews [3]. These sources are useful when a product has been studied and published; they will typically show trial identifiers, outcome measures, and links back to registry entries.
3. Commercial and institutional trackers: paywalled compendia and university portals
Commercial databases such as the Natural Medicines Comprehensive Database aggregate safety, formulation, and trial data for marketed supplements and are cited repeatedly as a commonly used professional resource [3]. University trial portals and research consortia (example: UC BRAID’s dietary supplement page) publish local listings of supplement trials run by their investigators, and contract research organizations or marketing CROs often advertise their ability to run supplement trials and sometimes list recent studies [4] [5] [11]. These sources help locate institution-specific trials or industry-sponsored work that might not appear prominently in consumer-facing searches.
4. How to search specifically for “GlycoPezil” (practical steps and limits)
Begin with ClinicalTrials.gov: run a free-text search for “GlycoPezil” and common spelling variants (Glycopezil, Glycopezil™) and then broaden to ingredient-level and sponsor searches if the brand name returns no hits; use status filters (recruiting, completed) and the “intervention” and “other terms” fields to capture product names or ingredients [1]. Simultaneously search PubMed for the same name and its variants to capture any published trials that cite a registry ID [2]. Check the Natural Medicines Comprehensive Database and institutional trial pages (UC BRAID) for commercial formulation listings or investigator-initiated trials that might not be obvious in general registries [3] [4]. Finally, inspect the product’s own promotional or corporate websites for claims about clinical testing—but promotional claims are not a substitute for registry or peer‑reviewed records and must be cross‑checked against trial registries and PubMed [6] [7] [5].
5. What the supplied reporting actually shows about GlycoPezil
The supplied material includes promotional websites for a product called Glycopezil / Glycopezil™ that make marketing claims about blood‑sugar support and manufacturing practices [6] [7], but the curated public registries and academic entries provided do not contain a verifiable ClinicalTrials.gov registration or PubMed trial publication for “GlycoPezil” as a studied intervention [1] [2]. That gap in the supplied sources means the presence or absence of a real, registered clinical trial cannot be conclusively established here; the correct next step is to run the concrete searches described above on ClinicalTrials.gov, PubMed, Natural Medicines, and institutional portals to confirm.