Why lacto fermented? They fully lacto ferment their products, creating live enzymes and cultures in the process. Lacto fermentation is the oldest food preservation method in the world and is accomplished by using salt water (not vinegar, sugar or heat canning) to preserve the vegetables. Lacto fermentation involves creating an oxygen-free environment, wherein the bad bacteria dies and the good bacteria (probiotics) flourish. What results are pickles that are live, raw, and full of beneficial live cultures that promote a healthy gut and boost immunity.