Yeast Extract is supplied by HiMedia. It is available in the form of a light yellow to brownish yellow homogenous free flowing powder, which is freely soluble in water. The pH (2% w/v aqueous solution) is between 6.3 to 7.3. Since it is hygroscopic, it is advisable to store this product in an air tight container in a dry area, at room temperature.

Yeast extract is obtained by controlled autolysis (self-digestion) of selected strain of yeast Saccharomyces. This water-soluble fraction of the autolysis process is rich in B complex vitamins and serves as an excellent nitrogen source. It is also rich in amino acids, peptides, purine and pyrimidine bases and growth factors. Since yeast extract is obtained from non-animal sources, it can be used as nutritional supplement in animal-free mammalian and insect cell culture media formulations.