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A Phase 1 Randomized, Placebo-Controlled Study Evaluating the Safety, Tolerability, and Pharmacokinetics of Enteric-Coated Stabilized Sulforaphane (SFX-01) in Male Participants

Glen Clack, Christopher Moore, Linette Ruston, David Wilson, Annelize Koch, Danielle Webb, Nicholas Mallard
Advances in Therapy 2025 42(1):216-232

Bibliography

PubMed
PMID 39520658
PubMed Central
PMC11782309
Funding
The study was funded by TheraCryf PLC (formerly Evgen Pharma PLC), which also funded medical-writing support and the journal's Rapid Service/Open Access fees.
Competing interests
Glen Clack was an employee of TheraCryf PLC and managing director of Alise Oncology Ltd, a shareholder of TheraCryf PLC. The sponsor also held contractual control over individual-participant-data access as described in the paper.

Study snapshot

DesignPhase 1 randomized double-blind placebo-controlled dose-escalation trial
ModelHealthy adult men
Sample24
InterventionEnteric-coated SFX-01 at 300 mg once daily (46.2 mg sulforaphane), 300 mg twice daily or 600 mg once daily (92.4 mg sulforaphane), versus placebo
Duration7 days
EndpointsTreatment-emergent adverse events; Tolerability; Sulforaphane pharmacokinetics; Cmax; Urinary sulforaphane metabolite excretion

What the study showed, in plain terms

This Phase 1 study tested a stabilized, enteric-coated sulforaphane formulation rather than a glucoraphanin precursor. Sulforaphane was rapidly absorbed after the expected enteric-coating delay. Most treatment-related events were gastrointestinal and mild, but adverse events were common at these pharmacologic exposures.

Key findings

Seventeen of 18 SFX-01 recipients reported treatment-emergent adverse events, most commonly abdominal discomfort, nausea and vomiting; events were generally mild and transient. Peak total-thiol concentrations occurred about 3–6 hours after dosing, consistent with enteric delivery.

What this study can and cannot tell us

Very short Phase 1 study in 24 healthy men, with only 18 receiving active drug. It evaluates a stabilized pharmaceutical-like formulation at defined sulforaphane doses and should not be used to estimate side-effect rates for lower-dose food or glucoraphanin supplements.

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