Do you like your Cheese with crystals in it?
"What is it and why does it happen? Some hard cheeses like vintage cheddar can develop Calcium Lactate crystals. Naturally occurring calcium and lactose is found in cows’ milk and therefore, cheese made from cows’ milk will contain these components too. During the aging process hard cheeses lose water and this is when the crystals form. There is no health risk associated with these crystals as they are part of the natural make up of the cheese. The cheese is therefore perfectly safe to eat."