Harmful Side Effects of Going on a Diet

1. You may feel sick.

Depending on the length of the fasting period," write the health experts at Harvard Medical School, "people may experience headaches, lethargy, crankiness, and constipation.

2. You'll feel fatigued

A simple fact: If you eat less food (also known as fuel), your body will have less energy to burn and you'll ultimately feel sluggish.

3. You'll slow down your metabolism

people who go on an extreme crash diet hobbled their metabolisms so profoundly that they never fully recovered.

4. You'll lose your hair

Effects on hair growth include acute telogen effluvium (TE), a well-known effect of sudden weight loss or decreased protein intake.

5. You'll lose muscle mass

Researchers from the University of Kiel in Germany took 32 non-obese males and slashed their calories by an average of 1,300 for a three-week period.

6. You could develop kidney stones

 a high-protein diet can actually lead to dehydration, which may place a significant strain on your kidneys as you may be more prone to developing kidney stones.

7. You could put yourself at risk of depression

Chronic dieters consistently report guilt and self-blame, irritability, anxiety and depression, difficulty concentrating and fatigue.

8. You could deprive yourself of essential nutrients

Fad diets are not always terrible, but people should understand the food groups and should try to ingest foods from all  to keep vitamin and mineral

9. If you're older, you could lose too much weight

If you're already marginal as far as body weight goes,I'd be concerned that you'd lose too much weight,which can affect your bones.

10. You may actually gain weight

As the Cleveland Clinic notes, many health experts believe that "80 to 95% of dieters gain weight back that they've worked so hard to lose.

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