Benefits
Appetite control and food intake (animal data)
Nexira reports an animal study of Carolean at the equivalent of 3 g a day in people, run for 4 weeks, with an average 47% reduction in food intake. The study has not been published and the species is not named, so the result cannot be checked, and it has not been tested in humans.
Slower stomach emptying (animal data)
The same unpublished Nexira animal study reported significantly slower gastric emptying after a single dose and with continued use. Slower emptying is the proposed route to longer fullness. No human measurement has been reported.
Viscosity build-up in simulated digestion
Under laboratory conditions mimicking the stomach (temperature and pH), Nexira reports that Carolean reached 70% of its maximum viscosity within 15 minutes. This is a property of the material in a test vessel, not a measured effect on fullness in people.
Gel-forming fiber and appetite in people (other fibers)
In 29 young adults, gelled pectin reduced appetite and slowed gastric emptying compared with no pectin, but energy intake 3 hours later did not differ. In 121 adults, cookies with a gel-forming alginate cut intake by 22%, while guar gum, a galactomannan like carob gum, did not differ from control. Neither study tested carob or nopal.
Mechanism of action
Slower gastric emptying
Soluble fibers that thicken or gel in the stomach can slow how fast a meal leaves it. In people, gelled pectin delayed gastric emptying compared with no pectin. For Carolean the only data are Nexira's unpublished animal study.
Carob fiber
Carob seed gum (locust bean gum) is a galactomannan, a soluble fiber that binds water and thickens, and is widely used as a food thickener. Nexira has not published which part of the carob plant Carolean uses.
Nopal soluble fiber and mucilage
Nopal cactus pads supply soluble fiber and mucilage that add viscosity alongside the carob component.
Patent-pending blend
Nexira describes the carob and nopal combination as synergistic and patent-pending. No published data compare the blend with either fiber alone.
Clinical trials
In vivo animal study at the equivalent of 3 g a day in people for 4 weeks, measuring gastric emptying and food intake. Not a human trial. (Nexira, unpublished 2024 study described on the Nexira website)
Animals; species not stated.
Nexira reports significantly slower gastric emptying after single and continued use and an average 47% reduction in food intake. No data or statistics have been published and the result has not been tested in people.
In vitro test under conditions mimicking ingestion (temperature, pH), measuring viscosity over time. Not a human trial. (Nexira, unpublished laboratory data described on the Nexira website)
No people or animals; laboratory test.
70% of maximum viscosity was reached within 15 minutes. This describes the material, not a measured effect on fullness in people.