Ecklonia Cava Extract is believed to help with weight loss and obesity through several mechanisms.

The compounds in ECE have been found to inhibit the enzyme Diacylglycerol acetyl transferase (DGAT), which is involved in intestinal fat absorption, lipoprotein assembly, regulation of plasma TG concentration, fat storage in adipocytes, and energy metabolism in muscle. DGAT is helps to synthesize fat bodies circulate throughout the bloodstream and end up contributing to building fat cells. Inhibition of DGAT has recently been recognized as a potential target for the treatment of obesity.

In one study, Ecklonia Cava Extract inhibited DGAT by more than 50%, and in obese lab rats, it reduced body fat and increased physical activity. In another study on animals given a high fat diet, Ecklonia Cava Extract contributed to fat resistance and leanness.

In a study on humans, 141 young adults were given a beverage containing 200 milligrams of Ecklonia Cava Extract once daily. After two weeks, the subjects showed these improvements, on average: a weight loss of 2.5 pounds, an increase in muscle mass of 2.5 pounds, and a 4 pound drop in body fat.