Truth or Hype?

Consuming grapefruit and grapefruit juice for weight loss purposes has been long promoted since the 1930s as a healthy addition to the diet to encourage body fat reduction. Most versions of the "grapefruit diet" include ingesting 1/2 a grapefruit or 8 ounces of juice before meals. Along with low-carb/low-calorie foods and ample protein intake, this dietary regimen is reported to help individuals lose an average of 10 pounds in as little as 10-12 days. But is this claimed benefit based on truth or hype?