liquid protein

noun Nutrition.
  1. an amino acid hydrosol used in weight-reduction programs as a substitute for all or some meals: generally regarded as hazardous to health because of low nutritional content and recommended for controlled use only under medical supervision.

Origin of liquid protein

First recorded in 1965–70
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018