Clinical trials are very expensive to run, costing $1.3 billion on average.

Source: https://medcitynews.com/2023/04/how-risk-based-quality-management-improves-data-quality-patient-safety-accelerating-drug-development/

Clinical trials found 77 per cent of participants lost a quarter or more of their original weight a year after having the procedure.

Source: https://www.dailymail.co.uk/news/article-12568847/Weight-loss-operation-90-minutes-slashes-size-patients-stomach-two-thirds-recommended-introduction-NHS.html?ns_mchannel=rss&ns_campaign=1490&ito=1490

Clinical trials of a new drug are under way and experts from Dundee University believe the results could point the way to new treatments.

Source: https://www.dailymail.co.uk/news/article-12523815/Could-cure-Parkinsons-way-Scientists-say-possible-THREE-years.html?ns_mchannel=rss&ns_campaign=1490&ito=1490