Cost: Approx. $15 to join; $9.95 per week
Contact: (800) 651-6000; www.weightwatchers.com
Features: Weekly meetings, incentive programs and a specialized magazine.
Cost: Approx. $199–$369; $77–$105 per week for food
Contact: (800) 597-JENNY; www.jennycraig.com
Features: One-on-one counseling and pre-portioned food, which can be pricey.
>L.A. Weight Loss
Cost: $5 per week
Contact: (800) 331-4035; www.laweightloss.com
Features: Private sessions and customized meal plans.
>T.O.P.S. (Take Off Pounds Sensibly)
Cost: $20 to join; approx. $5 per month
Features: Diet plans, weekly group meetings, weigh-ins and seminars.