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The substance orlistat is derived from lipstatin, which is known as a natural inhibitor of pancreatic lipases, an enzyme that breaks down triglycerides in the intestine. By inhibiting the function of the said enzyme in the intestine, orlistat prevents the triglycerides or fats from being processed and absorbed by the body. Instead, the fatty acids are excreted from the body undigested. Orlistat is only absorbed in the body in trace amounts. The primary route of the fats is through the feces.

Xenical allows about 30 percent of fat calories that are taken in from one's diet to go through the intestinal tract undigested and eliminated through the feces. This results in a reduction in weight as fewer fats are being absorbed by the body. Xenical is primarily being prescribed only for obese patients with a body mass index of 30 or more.

What makes Xenical an ideal weight reduction treatment is that it does not affect the brain or the central nervous system. It works mainly in the intestine and the side effects that may be experienced are gastrointestinal-related. Users of the prescribed drug may also experience flatulence as well as stool that may be oily and loose due to the exit of undigested fats.  Some people may also experience more frequent bowel movements with a little incidence of some experiencing bowel incontinence.

Xenical is an effective anti-obesity treatment for people with diabetes, high blood pressure or heart disease. It is a relatively safe anti-obesity drug that also provides a long term solution for a person's weight problems. But the drug, just like any other weight reduction solution, should be combined with a healthy low-fat diet as well as regular exercise in order to provide the best results.  People should not try to rely solely on the said anti-obesity drug to lose weight.

And because the drug works with preventing fats from being absorbed by the body in the intestines, users are advised to supplement their body with essential fat soluble vitamins since the normal diet may not be able to provide the necessary amounts due to the effect of the anti-obesity drug. A multivitamin tablet containing the vitamins A, D, E and K as well as beta-carotene should be taken at least two hours before or after taking orlistat.

Hydroxycut has been one of the leading fat burner food supplement and it has been mostly focusing on the need of men. Yet again, those days are all gone. The famous fat burner has something to offer the fitness conscious women through its Hydroxycut Max.

The supplement was said to have an effect to trigger the fat burning hormone in a woman's body. It is made of twenty-five fantastically different ingredients to form part the most effective fat burner and seemingly regular tablets in the surface for women.

Everything sounds perfect. Yet according to some one cannot be really sure on whether one capsule of the said brand really contains 300mg of Cissus Quaragularis that is said to be very helpful in loosing weight as per the studies made with regard to this kind of product.

Nevertheless, several women who have tried this product said that it is good and is making them lose more weight. This product then must be really effective.

Hoodia is a flowering plant which is similar to the cactus due to its spiny appearance. It can reach as high as one meter and have large flowers, often with fresh color and strong smell. It is typical in the plains and rocky areas of the Namib desert, ranging from Central Namibia to southern Angola and Kalahari Desert of South Africa. It is also known as Bushman's Hat and Queen of the Namib.

One of its thirteen species, Hoodia gordonii, is famously used as an effective weight loss ingredient. The Sans Bushmen tribes of Africa has long been using the Hoodia to suppress their hunger when they partake on long trips for hunting.

Hoodia is one of the major sources of drugs that cause reduction of body weight.

According to research done by scientists at Brown University, hoodia contains steroidal glycosides that stimulate the nerve cells in the hypothalamus of the brain which regulates blood glucose.

It suppresses the appetite to 2000 calories a day, boosts metabolism, burns fat and enhances the energy. Some have ground and made it as a powder. It is also used with alcohol to make the ingredients concentrated. These form of the plant is either sold in capsules or in liquid form such as syrup or tea.

It is also in the form of a hoodia patch, wherein it is applied through the skin, just like that of a nicotine patch. While some prefer the hoodia patch because it can easily be applied and left behind as the active ingredient of the hoodia are transferred to the bloodstream, some complain that it triggers allergies like skin irritation and itching, although this is only a rare case.

However, solely relying the diet to religious intake of hoodia doesn't guarantee instant weight loss. Dieters also need to help themselves to achieve their weight loss goals. Remember that the fact that it suppresses the appetite doesn't mean that it address overeating problems.

Dieters still need to watch their food intake. Hoodia will not build muscles and the only way to build it is through regular exercise. To be able to get the most out of hoodia, one must learn to maintain a good diet and engage in physical activities.

As a diet supplement pill, ephedra works by stimulating the nervous system and through the brain may help in suppressing the appetite. This action is due to the substances called ephedrine and pseudoephedrine found in ephedra. It can also act as a thermogenic, stimulating the thyroid gland to help increase the body's metabolic rate which allows a person to lose weight. Ephedra supplements are also used by some athletes as an energy booster.

Ephedra is sometimes used as a weight loss supplement in combination with aspirin and caffeine. There are some studies that show that ephedra shows to more effective in short term weight loss than a placebo in controlled trials. But despite its effectiveness, the use of ephedra diet supplements has recently come under fire due to the numerous complaints of serious side effects that may be experienced through its use.

The safety of ephedra dietary supplements has been questioned during the recent years by the US FDA (Food and Drugs Administration) due to the high rate of serious side effects as well as a number of ephedra related deaths. This led to the FDA banning the sale of the product in April of 2004. Due to the serious health risk that they pose, the sale of dietary supplements containing ephedra is illegal in the US.

The use of ephedra dietary supplements may lead to side effects such as dizziness and nausea, severe skin reactions, headaches, and vomiting. Some of the most serious side effects that this type of dietary supplement pose include dehydration, irregular heartbeat, hyperthermia, seizures as well as heart attacks that may lead to stroke or death. For this reason, the use ephedra diet supplements poses a number of possible dangers that may negate the benefits that it can provide by way of weight loss.