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Weight loss: Choosing a diet that's right for you

What are the options?

The table below lists some of the more common diets. There's overlap, but most plans can be grouped into a few major categories.

Studies comparing different weight-loss programs have found that most programs result in weight loss in the short term compared with no program. Weight-loss differences between diets are generally small.

Diet type and examples Flexible Nutritionally balanced Sustainable for long term
DASH = Dietary Approaches to Stop Hypertension, HMR = Health Management Resources.
Balanced (DASH, Mayo Clinic, Mediterranean, Weight Watchers) Yes. No foods are off-limits. Yes. Yes. Emphasis is on making permanent lifestyle changes.
High protein (Dukan, Paleo) No. Emphasizes lean meats, dairy. Deficiencies are possible on very restrictive plans. Possibly. But the diet may be hard to stick to over time.
Low carb (Atkins, South Beach) No. Carbs are limited; fats or proteins or both are emphasized. Deficiencies are possible on very restrictive plans. Possibly. But the diet may be hard to stick to over time.
Low fat (Ornish) No. Total fat is limited; most animal products are off-limits. Yes. Possibly. But the diet may be hard to stick to over time.
Meal replacement (Jenny Craig, HMR, Medifast, Nutrisystem, SlimFast) No. Replacement products take the place of one or two meals a day. Possibly. Balance is possible if you make healthy meal choices. Possibly. Cost of products varies; some can be cost prohibitive.
Very low calorie (Optifast) No. Calories are severely limited, typically to 800 or fewer calories a day. No. No. Diet is intended only for short-term use with medical supervision.

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