To begin, gop-chang is made from the small intestines of a cow or a pig. Gop-chang may sound and look disgusting but it has a lot of nutrients that could be good for your body. For example, gop-chang has plenty of iron and vitamins that could be helpful to people with weak bodies. Also when it is enjoyed with alcohol it helps the body break down the same. Many people also like it because it is very chewy.
Next, is mak-chang. Mak-chang is made from the fourth stomach of a cow. It is often called hong-chang. Mak-chang has a lot more calcium than regular cow meat and it also contains less cholesterol. Mak-chang is especially good for children when they are growing and it aids digestion for adults.
These may look and sound very disgusting but if you try them for your health I think you will grow to enjoy them for their taste as well.