The high purity L- Lactates synthesized from natural L(+) lactic acid are widely used in food additives, cosmetics, raw materials of medicine and chemical industry. L-calcium lactate , L-zinc lactate and L-ferrous lactate provide body with trace minerals such as calcium, zinc and iron, which can be efficiently absorbed. L-sodium lactate is used extensively in medicine infusion, food preservation and flavoring. L-potassium lactate is used to keep food fresh or pharmaceutical material, L-magnesium lactate is mainly applied in food, beverage and medicine, etc.