Weight Loss Drugs

Weight loss is a reduction of body weight that is triggered by exercise, dieting or an involuntary condition such as an illness. As it is well known when the body does not get enough calories it starts to burn the fat that was deposited in the fat tissue. Normal intake of calories for a human being is about 1800-2200 calories a day. One gram of burned fat produces 9 calories so it is easy to count how much fat are you burning when you lower your calories intake. Dieting or voluntary weight loss nowadays is very common for people with health problems like obesity, heart dysfunction or for people who might not necessarily need it but want to look good. Weight loss or even fast weight loss may be caused by illness that are associated with such severe conditions like:

• Cancer
• Chronic diarrhea
• Chronic inflammation

Obesity is a condition of extreme overweight when the body mass index or BMI is above 30. Or for people with over risk factors as hypertension or diabetes above 27. The weight loss drugs used for fighting obesity is most commonly given only by prescription and should not be used without doctors supravision. Most of the weight loss drugs work by suppressing the appetite only a few like Xenical have different therapeutic action.