Historically, meads were fermented with wild yeasts and bacteria (as noted in the recipe quoted above) residing on the skins of the fruit or within the honey itself. Wild yeasts can produce inconsistent results. Yeast companies have isolated strains of yeast which produce consistently appealing products. Brewers, winemakers and mead makers commonly use them for fermentation, including yeast strains identified specifically for mead fermentation. These are strains that have been selected because of their characteristic of preserving delicate honey flavors and aromas.