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Use of weight-loss supplements in the United States is fairly common.
Approximately 15% of U.S. adults have used a weight-loss dietary
supplement at some point in their lives, with more women reporting use
(20.6%) than men (9.7%).
Americans spend about $2 billion a year on weight-loss dietary
supplements in pill form (e.g., tablets, capsules, and softgels), and to lose weight is one of the top 20 reasons why people take dietary supplements.
Dietary supplements promoted for weight loss encompass a wide variety of products and come in a variety of forms, including capsules, tablets, liquids, powders, and bars. Manufacturers market these products with various claims, including that these products reduce macronutrient absorption, appetite, body fat, and weight and increase metabolism and thermogenesis. The average product contains 10 different ingredients, but some contain as many as 96. Common ingredients include botanicals (herbs and other plant components), dietary fiber, and minerals.
In its report on dietary supplements for weight loss, the U.S. Government Accountability Office concluded that "little is known about whether weight loss supplements are effective, but some supplements have been associated with the potential for physical harm". Many weight-loss supplements are costly, and some of these products' ingredients can interact or interfere with certain medications. So it is important to consider what is known—and not known—about each ingredient in any dietary supplement before using it.
People who are considering using weight-loss supplements should talk with their health care provider to discuss these products’ potential benefits and risks. This is especially important for those who have medical conditions, including high blood pressure, diabetes, or heart disease. Yet according to a large national survey, less than one-third of U.S. adults who use weight-loss dietary supplements discuss this use with a health care professional.
For more information about dietary supplement regulation, see the ODS publication,
Complicating the interpretation of many study results is the fact that most weight-loss dietary supplements contain multiple ingredients, making it difficult to isolate the effects of each ingredient and predict the effects of the combination. Furthermore, dosages and amounts of active components vary widely among weight-loss supplements, and a product's composition is not always fully described in published studies. Studies may also use different and sometimes inappropriate assessment techniques to measure the effectiveness of a given treatment. All of these factors can make it difficult to compare the results of one study with another.
Table 1 briefly summarizes the findings discussed in more detail in this fact sheet on the safety and efficacy of the most common ingredients of weight-loss dietary supplements. These ingredients are listed and discussed in the table and in the text in alphabetical order. Dosage information is provided when such information is available. However, because ingredients might not be standardized and many products contain proprietary blends of ingredients, the active compounds and their amounts might not be comparable among products.
Dietary supplements promoted for weight loss encompass a wide variety of products and come in a variety of forms, including capsules, tablets, liquids, powders, and bars. Manufacturers market these products with various claims, including that these products reduce macronutrient absorption, appetite, body fat, and weight and increase metabolism and thermogenesis. The average product contains 10 different ingredients, but some contain as many as 96. Common ingredients include botanicals (herbs and other plant components), dietary fiber, and minerals.
In its report on dietary supplements for weight loss, the U.S. Government Accountability Office concluded that "little is known about whether weight loss supplements are effective, but some supplements have been associated with the potential for physical harm". Many weight-loss supplements are costly, and some of these products' ingredients can interact or interfere with certain medications. So it is important to consider what is known—and not known—about each ingredient in any dietary supplement before using it.
People who are considering using weight-loss supplements should talk with their health care provider to discuss these products’ potential benefits and risks. This is especially important for those who have medical conditions, including high blood pressure, diabetes, or heart disease. Yet according to a large national survey, less than one-third of U.S. adults who use weight-loss dietary supplements discuss this use with a health care professional.
*Dietary
supplements are labeled with a Supplement Facts panel and do not
include meal replacement shakes or prescription or over-the-counter
medications.
Regulation of Weight-Loss Dietary Supplements
The U.S. Food and Drug Administration (FDA) regulates dietary supplements promoted for weight loss in accordance with the Dietary Supplement Health and Education Act of 1994. Like other dietary supplements, weight-loss supplements differ from over-the-counter or prescription medications in that the FDA does not classify them as drugs. Unlike drugs, dietary supplements do not require premarket review or approval by the FDA. Supplement manufacturers are responsible for determining that their products are safe and their label claims are truthful and not misleading. However, manufacturers are not required to provide that evidence to the FDA before marketing their products. If the FDA finds a supplement to be unsafe, it may remove the product from the market or ask the manufacturer to voluntarily recall the product. The FDA and the Federal Trade Commission (FTC) may also take regulatory actions against manufacturers that make unsubstantiated weight-loss claims about their products. The FDA does not permit dietary supplements to contain pharmaceutical ingredients, and manufacturers may not promote these products to diagnose, treat, cure, or prevent any disease.For more information about dietary supplement regulation, see the ODS publication,
Common Ingredients in Weight-Loss Dietary Supplements
Weight-loss dietary supplements contain a wide variety of ingredients. Not surprisingly, the amount of scientific information available on these ingredients varies considerably. In some cases, purported benefits are based on limited theoretical data or animal and laboratory studies rather than human clinical trials. In other cases, studies supporting a given ingredient's use are small, of short duration, and/or of poor quality, limiting the strength of the findings. In almost all cases, additional research is needed to fully understand the safety and/or efficacy of a particular ingredient.Complicating the interpretation of many study results is the fact that most weight-loss dietary supplements contain multiple ingredients, making it difficult to isolate the effects of each ingredient and predict the effects of the combination. Furthermore, dosages and amounts of active components vary widely among weight-loss supplements, and a product's composition is not always fully described in published studies. Studies may also use different and sometimes inappropriate assessment techniques to measure the effectiveness of a given treatment. All of these factors can make it difficult to compare the results of one study with another.
Table 1 briefly summarizes the findings discussed in more detail in this fact sheet on the safety and efficacy of the most common ingredients of weight-loss dietary supplements. These ingredients are listed and discussed in the table and in the text in alphabetical order. Dosage information is provided when such information is available. However, because ingredients might not be standardized and many products contain proprietary blends of ingredients, the active compounds and their amounts might not be comparable among products.
Hoodia Gordonii Succulant