Phoenix, AZ (Vocus) HCG Diet Direct releases the Top 3 List of HCG Diet Dangers. The HCG Diet is in use throughout the nation. It is a popular method for rapid, drastic weight loss. Homeopathic HCG dieting methods have increased its popularity exponentially in the past few years. Dieters are far more successful if they are aware of the HCG diet dangers that tend to work against dieters.