But the small print often tells a different story - either that users should follow a calorie-controlled diet, or only eat at certain times of the day, or stop eating certain high-calorie foods, or some combination of all three.
Using this example, let's look at a few possible scenarios with losses ranging from two to four pounds per week.
So the answer to the question is yes - it's safe to lose more than two pounds per week...
If you lose three to five pounds per week, and you know it's all fat, and not lean tissue, then more power to you!
Of course the only way to know this is with body composition testing.
In short, relying on pills for weight control can mess up your body and your mind.
The Small Print Says It All.
Advertisements and infomercials for diet pills are dominated by headlines like: "Effortless Weight Loss" or "Lose Weight While You Sleep!" and so on.
In short, while helpful to some patients, weight loss drugs are not yet the answer to obesity, especially when factors like cost are taken into account.
Should we be surprised? Not really.
Furthermore, few long term clinical trials are conducted on non-prescription pills, so hard evidence as to their safety and efficacy is scarce. Such claims are not generally supported by clinical evidence, and some suppliers are under investigation by both the FDA and FTC.
Thus not all ingredients need to be tested, dosages and other labeling requirements are less stringent, and reporting of "adverse events" or health problems is not mandatory.
Patience. It's the one thing you never seem to have when you've got a body fat problem. You want the fat gone and you want it gone now! And why not? It seems so do-able.
Look for a healthy, gimmick-free diet, and follow it as carefully as you can. In the process, focus on healthy eating rather than calorie reduction. Aiming to eat healthily is much more positive than calorie control.
By comparison, less well supervised obesity drug trials tend to have a higher drop-out rate and reduced weight loss. And the longer the trial, the lower the compliance and the lower the weight loss.