starch blocker

or starch block

[stahrch blok-er or stahrch blok]
  1. a substance ingested in the belief that it inhibits the body's ability to metabolize starch and thereby promotes weight loss: declared illegal in the U.S. by the FDA.

Origin of starch blocker

First recorded in 1980–85
Related formsstarch-block·ing, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018