With an overwhelming number of weight-loss supplements flooding the market today, it's best to only use those supplements that have proved to be effective in a clinical setting; this way you will get the best results, while conserving money and being safe. Among these clinically proven weight-loss supplements are green tea extract, psyllium husk, glucomannan, CLA and whey protein.
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Green Tea Extract
One 2007 study published in “Obesity” found that green tea extract could reduce the risk for cardiovascular disease by reducing body fat, LDL cholesterol and systolic blood pressure. Green tea extract contains a substance known as catechins that are responsible for its weight-loss properties. The subjects who lost weight in the study were given green tea extract containing 583 milligrams of catechins per day.
Psyllium husk is a form of soluble fiber that is commonly used in fiber supplements. A 2010 paper published in the “Clinical Journal of Gastroenterology” noted that various fibers can have a weight-reduction effect on the body, though psyllium husk stands out as being among the most effective in reducing weight, cholesterol and triglycerides.
Glucomannan is another fiber supplement that stands out for its role in weight reduction. A 2005 study published in “Medical Science Monitor” tested with glucomannan along with two fiber supplements on 167 obese men and women, who were otherwise healthy. The study concluded that glucomannan reduced body weight, while the other fiber supplements did not
CLA, or conjugated linoleic acid, is a type of fatty acid that naturally occurs in dietary sources but can also be supplemented. A 2012 double-blind placebo-controlled trial published in “Nutrition” tested 1.7 grams of CLA for 12 weeks on grade 1 obese Chinese subjects. The result was a lower rate of obesity in these subjects, with no apparent negative side effects.
Although whey protein may be most popular for its role as a muscle enhancing supplement, it may also be useful for reducing body fat, particularly when calories are restricted. A 2008 study published in “Nutrition and Metabolism” administered whey protein to subjects adhering to a 500-calorie reduced diet. The study found that subjects who were given whey protein lost significantly more body fat and retained more muscle tissue compared with a control group, which also adhered to a 500-calorie reduced diet.