Acid extract conditions are extensively used in the industry but the degree of acid varies with different processes.

A small quantity of the acid extract was placed within the bloodstream of a living animal by means of a hypodermic needle.

(1906) On the treatment of diabetes mellitus by acid extract of duodenal mucous membrane.

Dried sunflower leaves collected immediately after opening are processed into 98.38% chlorogenic acid extract and marketed in Bulgaria under the name of "Yamiagra" - "Yummyiagra".

Some Japanese researchers refer to the kokumi of foods laden with alcohol and thiol-groups in their amino acid extracts, and this sensation has also been described as mouthfeel.