Is salad good for weight loss?

Yes, when it’s a real meal. In a year-long trial, women told to eat more water-rich food like vegetables lost 17.4 lb (7.9 kg) against 14.1 lb (6.4 kg), and said they were less hungry. A salad is one of the easiest ways to eat that way, as long as it has protein and the dressing is measured.

Salad has a reputation as diet food, and it can go wrong in two opposite directions. A cobb with a ladle of ranch is about 770 calories. A bowl of leaves with a spoon of dressing is about 140, and it leaves you hungry well before dinner. Both are called salad, and neither one helps much.

A good salad works like a buffet where the vegetables are free and everything else has a price. You can fill the plate and still keep the bill small.

The trial

Barbara Rolls’s lab at Penn State put 97 women with obesity on one of two diets for a year. One group was told to eat less fat. The other was told to eat less fat and more water-rich food, mostly fruit and vegetables. Neither group got a calorie target, and they could eat as much as they wanted while following the advice.

Of the 71 who finished, the vegetable group lost 17.4 lb (7.9 kg) and the fat-only group 14.1 lb (6.4 kg). Both cut fat by about the same amount. The vegetable group ate a greater weight of food, which brought down the calories per bite of their diet, and they reported less hunger.

The difference between the groups was about 3.3 lb over a year, which is real but modest. It came from eating more food for fewer calories per bite.

Calories per bite

Researchers call it energy density, the calories in each gram of food. Leaves are about 0.15 calories a gram, so a big bowl costs very little. What you put on top decides where the bowl lands.

Per bite, the caesar has about twice the calories of the salad with chicken, with a third of the protein.

The same idea works before a meal. In another Penn State study, 42 women ate a salad they had to finish before a pasta lunch. A big, light salad cut the whole lunch by 12%. A salad the same size made rich with more dressing and cheese raised it by 17%. Those were single lunches in a lab, so the long-term effect is less clear, but it lines up with the year-long trial.

Make it work for you

• Find your calories. tdee.guide works out a calorie target for losing weight, and our bowl builder shows where your salad sits against the meal-sized window for your day.
• Keep the protein. A 2015 review found people felt fuller after higher-protein meals, with about 25 to 30 g a meal as the helpful amount. In diet trials, people on higher-protein plans also kept more lean mass, which bodyfat.guide covers.
• Measure the dressing. The same cobb is about 580 calories with one tablespoon of ranch and 770 with four.

If you’re often hungry after your salad, our quiz, Why am I hungry after my salad?, finds which part of your bowl is short.