What Kind of Weight Loss Program? continued...
Over a year, the program should offer 12 to 26 sessions, Grossman says. "Low-intensity [and] anything less than 12 sessions don't work," he says, citing evidence reviewed by the task force.
Ideally, the programs should help patients become accountable for weight loss and maintenance. To do so, they need to learn such skills as counting calories or fat, he says.
"Really the critical thing is to maintain that weight loss after the program stops," he says.
In 2003, the USPSTF did not find the evidence strong enough to recommend these programs for obese people, he says.
Since then, Grossman tells WebMD, additional studies have been done. The USPSTF found evidence that intensive behavioral intervention for obese adults can help them lose weight and improve their risk factors for heart disease.
The task force found that intensive programs can help obese people lose, on average, about nine to 15 pounds.
The effects for those who are overweight but not obese are not as clear, the experts say.
While some research finds that adding the drugs orlistat (Alli, Xenical) or the diabetes drug metformin (Glucophage, Glumetza, and others) help with weight loss, the task force does not recommend them.
Orlistat has been linked to rare but severe liver disease. Metformin is not FDA-approved to treat obesity.
Counseling Non-Obese but at-Risk
The task force also recommends that doctors consider counseling non-obese but at-risk patients about eating more healthfully and exercising regularly.
The new recommendation combines two previous recommendations that suggested doctors talk about the two separately, Grossman says.
It just makes sense, he says, to counsel patients on nutrition and physical activity at the same time.
Doctors are advised to use their clinical judgment on who to counsel. For instance, Grossman says, a doctor might advise someone with a BMI of 29 and a family history of heart disease to lose weight and exercise more.
"We don't want people to misinterpret this," he says. Physical activity and healthy diet are important for everyone, he says.
The task force is an independent panel of national experts in prevention and evidence-based medicine. It makes recommendations about such services as screenings, medications, and counseling.
Insurers and medical associations look to the recommendations for guidance.