Everything is harmful for health if you consume more of it. just eat it infrequently and you'll be fine.
Instant noodles are often criticized as being unhealthy or junk food. A single serving of instant noodles is high in carbohydrates but low in fiber, vitamins and minerals. Noodles are typically fried as part of the manufacturing process, resulting in high levels of saturated fat and/or trans fat. Additionally, if served in an instant broth, instant noodles typically contain high amounts of sodium. The current U.S. Recommended Dietary Allowance of sodium for adults and children over 4 years old is 2,400 mg/day. Some brands may have over 3,000 mg of sodium per package in extreme cases. Instant noodles and the flavoring soup base also contain high amounts of monosodium glutamate.