Junk Food Affects Your Energy Levels
Junk food doesn't contain the
nutrients your body needs to stay healthy. As a result, you may feel
chronically fatigued and lack the energy you need to complete daily tasks. The
high levels of sugar in junk food puts your metabolism under stress; when you
eat refined sugar, your pancreas secretes high amounts of insulin to prevent a
dangerous spike in blood sugar levels.Because fast food and junk food don't contain adequate amounts of protein and good carbohydrates, your blood sugar levels will drop suddenly after eating, leaving you feeling grumpy, fatigued and craving sugar.
Junk Food Contributes to Poor Performance and Obesity
Junk food contains large
amounts of fat, and as fat accumulates in your body, you'll gain weight and
could become obese. The more weight you gain, the more you'll be at risk for
serious chronic illnesses such as diabetes, heart disease and arthritis. You
could even have a heart attack.
The high levels of fat and
sodium in junk food can cause high blood pressure or hypertension. Excessive
dietary sodium can also have a negative effect on renal function, even leading
to kidney disease.
In the short term, high levels
of dietary fat lead to poor cognitive performance. You'll feel tired and have
trouble concentrating because your body might not be getting enough oxygen.
Junk Food Can Damage Your Liver and Heart
The high levels of fat and
sodium in junk food and fast food can contribute to heart disease by raising
blood cholesterol levels and contributing to arterial plaque build up. The high
levels of Trans fatty acids found in many junk foods and fast foods can lead to
fatty liver deposits, which, over time, can cause liver dysfunction and
disease.Junk Food Can Lead to Diabetes
Over time, the high levels of
sugar and simple carbohydrates in junk food can lead to type 2 diabetes. This
occurs because eating too much sugar puts your metabolism under stress; when
you eat a lot of refined white sugar and simple carbohydrates, your body has to
pump up insulin production to prevent a dangerous spike in blood sugar levels.
Because junk food doesn't
contain the protein or complex carbohydrates that your body needs to maintain
consistent blood sugar levels, your blood sugar levels will drop suddenly soon
after eating. You'll crave sugar and likely end up eating more junk food.Over time, this stress damages your body's ability to use the insulin secreted by your pancreas. A healthy diet can help maintain your body's insulin sensitivity.
Even in the short term, eating
too much junk food can make you feel really uncomfortable. It can lead to mood
swings and constipation, and lower your energy levels so that you lack interest
in the exercise you need to burn off those extra calories.
Nutrient Deficiencies
Processing
that removes vitamins, minerals and fiber makes junk foods into the sources of
empty calories that nutritionists disparage. Children who eat a lot of junk
foods may develop nutritional deficiencies that lead to low energy, mood
swings, sleep disturbance and poor academic achievement, among other health
conditions.