Although many natural health practitioners recommend flaxseed as part of a weight loss program, there is insufficient evidence to prove its efficacy for weight loss, according to WebMD. However, one study suggests that taking flaxseed fiber prior to meals may reduce appetite and curb food intake in non-obese young adults.
In the study, researchers found that taking flaxseed fiber potentially reduced the appetite and intake level in only some of the subjects, notes WebMD. Nonetheless, other research in obese adults showed that taking 40 grams of flaxseed each day over a course of 12 weeks did not reduce body mass or weight in study participants. More research on flaxseed is necessary to determine flaxseed's role, or lack thereof, in weight loss, as of 2015.