Nearly 75% of people do not possess the necessary enzymes to digest dairy, this includes cheese. Additionally, cheese contains lactose, which is a sugar that can impact ketosis and should be limited to optimize ketosis.
Cheese also contains casein, a protein that can further drive inflammation and may even contribute to mood disorders.
Not everyone needs to avoid cheese but most should limit it. If you notice fatigue, bloating, digestive problems, or weight loss stall, cheese may be the problem and cutting it can make a big difference.
If you are going to choose to consume cheese, remember that the source important since most a lot of cheese contains a lot of processed ingredients so looking for whole food grass-fed sources is important!
Furthermore, all of the beneficial nutrients found in cheese can be found in other Keto-Friendly sources removing any need to consume cheese.