Yep, healthy eating is crucial. An unhealthy diet can cause diseases such as blindness, anemia, or health-threatening conditions.
I've had issues with my weight in the past. I'm doing really well and have lost almost 50 pounds so far. Neat, if you had obesity it would increase the chances of conditions and various diseases. It definitely does. So many health complications can be prevented by healthy eating. Although I do have a sweet tooth. But you can still eat it, it's all about portion control.
In humans, an unhealthy diet can cause deficiency-related diseases such as blindness, anemia, scurvy, preterm birth, stillbirth and cretinism, or nutrient excess health-threatening conditions such as obesity and metabolic syndrome; and such common chronic systemic diseases as cardiovascular disease, diabetes, and osteoporosis.