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Former FDA commissioners say China's scientific progress and faster trial start-up speed are driving more Phase 1 trials there than in the U.S.

Two former commissioners, writing before Heidi Overton's Senate hearing on Thursday, argue that FDA review capacity now decides where new medicines reach patients first. Their evidence is a count of trial starts.

The Scientist · Science desk

Illustration accompanying Former FDA commissioners say China's scientific progress and faster trial start-up speed are driving more Phase 1 trials there than in the U.S.

What happened

  • Two former FDA commissioners published an opinion piece in STAT arguing that Heidi Overton, nominated to lead the agency, can strengthen it, timed to her Thursday hearing before the Senate health committee.
  • Their central figure is a claim that more Phase 1 trials now start in China than in the United States, with similar shifts underway in later-stage trials and in the path to approval, coverage and access.
  • They put the agency's staffing loss at about 3,500 employees in the April 2025 layoffs, with further losses in the voluntary departures that came after.
  • They credit acting commissioner Kyle Diamantas with steps to strengthen the workforce, and note that many new job postings have been announced to rebuild professional staff capabilities.

Compiled by The ScientistSomething wrong?How this is made

Why it matters

  • constraint A registration tally cannot separate faster Chinese trial start-up from more Chinese chemistry, so on its own it cannot establish that US review capacity sets the order in which patients get access.
  • decision Senators sitting on the nomination are being asked to treat the FDA as a throughput problem that hiring and clear priorities can fix. That is a different vote from one on the agency's policy direction.
  • exposure Patient-specific gene therapies and cancer cell therapies repurposed for autoimmune disease go through the same product centers that lost policy offices and review schedulers.

A count of Phase 1 starts is a count of registrations. It records how many first-in-human studies opened in a jurisdiction. It does not weigh them by size, by quality, or by the chance that the compound behind any one of them reaches a marketing application. The op-ed's own sentence names two causes: the shift is "a reflection of real scientific progress underway in China, but also the country's ability to move new compounds into Phase 1 trials more quickly than the U.S. can," the authors wrote [5]. The op-ed gives neither cause a share [17].

The cuts they describe land on scheduling work. The April 2025 reductions eliminated entire offices that drafted policy and regulations, and hit the project managers who keep reviews on schedule and the teams that support inspectors [8]. The authors put the agency's ability to improve its review functions on the product centers, where those project managers sit [18].

The loss figure they give is a headcount: about 3,500 employees in the layoffs, plus more in the voluntary departures that followed [7]. The piece does not convert that into review times, missed goal dates, or applications delayed [16]. If regulatory capacity is what decides where a drug launches first, the evidence for it is review clocks.

On who does reviews, the two are direct. "The commissioner and a few political advisers can't review applications on their own, and should not be involved in those matters," they wrote [10]. The work takes thousands of career physicians and scientists [11]. What they ask of the next commissioner is specific: "A commissioner owes them clear priorities, an achievable set of well-defined policy goals, and sufficient qualified staff to do the work," they wrote [12].

The products waiting on those centers are the hard ones. Gene therapies are being crafted for individual patients, and cell therapies first used against cancer are being repurposed for autoimmune disease [14]. The authors credit Overton with practical policy work, including the initial Covid-19 response, and with close relationships with White House leadership [15]. They are plain about the failure they want her to avoid: ideas "for everything from modernizing clinical trials to changing the regulation of testosterone have withered somewhere between the speech or television hit announcing them and any practical, reliable policy change that would see them implemented," they wrote [13].

What to watch

  • Whether Overton, at Thursday's hearing, answers the Phase 1 comparison with review-time figures or with trial counts.
  • Whether the FDA's new job postings turn into filled reviewer and project-manager posts inside the product centers.
  • Whether anyone publishes the source and the counting rules behind the China-versus-US Phase 1 comparison.
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