Yeast for astaxanthin extraction, production method thereof, color tone improving agent using the same, and production method of astaxanthin

摘要

The production process for yeast for fat-soluble component extraction according to the invention comprises a breeding step wherein yeast having fat-soluble components to be extracted are bred, in such a manner that the pH of the medium decreases as growth proceeds, until falling below the limit of the breedable pH range.