Benefits
Appetite-regulating hormone support
In a controlled trial, the fish protein hydrolysate raised blood levels of the satiety hormones cholecystokinin (CCK) and GLP-1 compared with placebo. These gut hormones signal fullness to the brain, which is how the peptides are thought to support appetite regulation.
Body composition support
Taken alongside a mild reduced-calorie diet, the hydrolysate was associated with greater reductions in body weight, fat mass, and waist, hip, and thigh circumference than placebo over 90 days in slightly overweight adults.
Weight management
By supporting the body's own satiety signals, it is used as one part of a reduced-calorie weight-management routine rather than as a stand-alone solution.
Mechanism of action
Gut hormone stimulation
The bioactive peptides trigger enteroendocrine cells to release cholecystokinin (CCK) and GLP-1, hormones that signal fullness to the brain.
Reduced hunger signaling
Higher satiety-hormone activity is thought to lower the drive to eat, supporting smaller portions at meals.
Clinical trials
Randomized placebo-controlled study of a blue whiting fish protein hydrolysate at 1.4 and 2.8 grams on body composition and satiety-hormone levels. (Nobile et al. 2016, Food and Nutrition Research)
120 slightly overweight adults (BMI 25 to 30) on a mild reduced-calorie diet.
Over 90 days, both the 1.4 and 2.8 gram doses produced greater reductions in body weight, fat mass, and body circumferences than placebo and raised blood CCK and GLP-1 levels; the two doses did not differ, and placebo also lost some weight from the diet alone.