Calcium Lactate Gluconate - For Reverse Spherification (E327 + E578) is used as a catalyst in the reverse spherification process for liquids high in acids and alcohols in conjunction with sodium alginate when making spheres. The procedure results in spheres that gel on the outside and remain liquid in the center. Calcium Lactate Gluconate - For Reverse Spherification | Cape Crystal Brands is perfect for reverse spherification (dipped in sodium alginate bath) without adding any flavor at all to the product. It is soluble in cold liquids and can be used with acidic, high alcohol, or fatty mediums. This product is certified Kosher (Pareve) by OK Kosher