Arla Lacto Free Semi Skimmed Milk. 1 Litre size. Lactose free. Less than 0.03% lactose. We use rigorous scientific testing to ensure that Arla Lacto Free milk drink contains no lactose, using accurate accredited tests, enabling us to detect lactose at a trace level of 0.03%. At this level our tests show that there is no lactose present in Arla Lacto Free. Rich in protein, rich in vitamin B12, source of calcium.