Short term effects of unhealthy eating include nutritional deficiencies, stress and a lack of energy. There are many long term effects of unhealthy eating habits, including obesity, high blood pressure, high cholesterol, heart disease, type-2 diabetes, depression and certain types of cancer.
Obesity is a common condition resulting from unhealthy eating habits. The excess weight from obesity stresses the entire body and can lead to several other major health problems, such as heart disease, liver disease and stroke.
As a person's body fat percentage increases, his body uses insulin less efficiently, which can cause type-2 diabetes. Insulin carries glucose to the cells, but type-2 diabetes causes insulin resistance, which means insulin can't carry glucose to the cells and glucose builds up in the bloodstream. This can cause eye and kidney disease over time.
Foods high in sodium cause water retention, which can raise blood pressure. High blood pressure puts more pressure on the heart, which increases the likelihood of heart attack, stroke and coronary artery disease. Foods containing high amounts of saturated fat raise LDL cholesterol, which is considered bad cholesterol. They also lower HDL cholesterol, which is considered good cholesterol. This can lead to heart disease. Tooth decay results from eating foods containing excessive amounts of sugar or starch.