Servomyces is a nutritional yeast supplement (GMO free) that was originally developed for German brewers by Weihenstephan and Munich University. It conforms to the restrictions of Reinheitsgebot. Servomyces enables any yeast strain's ability to incorporate essential nutrients into its cellular structure.
For homebrewers, Servomyces is available in blister packs of six capsules, each of which can be used for a 5-gallon batch (20 to 25L). Servomyces is beneficial to beer, wine, mead and cider.
***Homebrew notes: Add 1 capsule 10 minutes prior to the end of the boil. OR, If your fermentation does not require a boil, open the capsule and pour in the Servomyces, since the capsule requires boiling to melt.