How Diet Pills are Tested
Diet pills are tested by researchers on obese
or very overweight patients in tests called clinical trials.
Clinical Trials of Diet Pills
During these diet pills trials, subjects
are typically divided into separate groups and given either a dosage of
the weight loss pill being tested, or a placebo (a non-active sugar pill).
Blind Trials of Diet Pills
Patients who take part in a blind weight
loss trial, don't know in advance whether they are being given diet pills
or placebos.
Double-Blind Trials of Diet Pills
An even more accurate weight loss trial is
what is called 'a double-blind weight loss trial'. In this case, neither
the patients NOR the trial-staff (doctors/researchers) know in advance
who is being given diet pills or placebos. A double blind trial of weight
loss pills is a very secure way to determine how safe and effective the
diet pills or weight loss supplements are for weight loss.
Difference Between Prescription vs, Nonprescription
Diet Pills
All prescription drugs, prescription diet
pills or prescription weight loss pills are legally required to undergo
a variety of clinical trials before receiving FDA approval for use by
overweight patients. By comparison, nonprescription diet pills, weight
loss pills or weight loss supplements available over-the-counter are not
required to undergo any clinical weight loss trials before (or during)
release. No prior FDA approval is required for these diet pills.
User-Surveys of Weight Loss Pills and Diet
Supplements
Manufacturers of weight loss supplements
and diet pills frequently cite details of user-surveys: (eg. "In
a recent test, users of our diet pills lost x amount of weight..")
These user-surveys cannot be compared to clinical weight loss trials.
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