A liquid suspension of Oenococcus oeni grown in a sterile organic juice based nutrient enriched medium. This product will provide rapid and complete malic acid reduction in high acid wines. Malic acid reduction will balance and soften wine while enhancing flavor and aroma characteristics including vanilla and buttery notes. Malo-lactic conversion is generally completed within 1-3 months. ER1A is an excellent choice for red wines, it was isolated for it tolerance to low pH conditions.