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New Drug-Free Pill Aims to Revolutionize Obesity Treatment
29 May
Summary
- A new hydrogel pill expands in the stomach to suppress appetite.
- Clinical trials show participants lost an average of 4.4% body weight.
- The pill is awaiting regulatory approval in Europe and aims to prevent obesity.

Scientists are developing a revolutionary drug-free weight loss pill that could signal a major shift in obesity treatment. The innovation, named Sirona, is a hydrogel pill designed to be swallowed. Upon ingestion, it expands within the stomach, reducing available volume and suppressing appetite. This method led to an average weight loss of 4.4% of total body weight in clinical trials over 24 weeks, with participants consuming approximately 400 fewer calories daily.
Developed by Oxford Medical Products, Sirona is not a medication but a material also used in contact lenses. It remains in the stomach for several days before breaking down and passing naturally. This approach offers an alternative to weight loss injections like Mounjaro and Wegovy, which have restricted NHS availability, high private costs, and potential side effects. Sirona is currently awaiting regulatory approval in Europe.
Participants in trials found Sirona effective, with one individual losing three stone in six months without the adverse reactions experienced with injections. Developers believe Sirona could aid those overweight but not yet eligible for prescription drugs, potentially preventing obesity progression. Experts also suggest it could assist individuals in transitioning off current weight loss medications to maintain their weight loss.