Instant food and drink thickening powder a clear, consistent and easy to use thickening agent to provide swallowing support for people with dysphagia. Improves swallowing safety compared to thin liquids Clinically shown to improve swallowing safety by reducing the risk of aspiration compared to thin liquid in dysphagia patients. Leonard retail. Poster presentation at the 1st congress of the European society for swallowing disorders, Leiden, The Netherlands, Sept 9 10, 2011