Short answer
Not from the order alone. Eating vegetables first kept blood sugar lower after meals, but over 16 weeks weight loss was no different from standard diet advice. Meals got smaller when a low-dressing vegetable starter cut the total calories.
Does eating vegetables first help you lose weight?
'Vegetables first → lower blood sugar → weight loss' — does this formula hold?
A popular claim says that eating the same food in a different order, vegetables first and rice or bread last, keeps blood sugar down and helps you lose weight. We checked blood sugar and body weight separately, one step at a time.
Does blood sugar rise less with vegetables first?
Yes, about 22 lower at 30 minutes
An analysis that pooled 18 trials found that eating vegetables first lowered blood sugar by about 22 at 30 minutes and about 9 at 60 minutes after the meal (in the units where normal fasting is under 100). At 2 hours it was about 4 higher. The spike was smaller and came down more slowly. Another review of 107 people pointed the same way.
So does weight come off too?
No difference after 16 weeks
45 people were split for 16 weeks: one group got standard diet advice, the other also got 'carbs last' food-order advice (39 finished). The food-order group ate 1 more cup of vegetables a day. Weight fell 1.6 kg (1.8%) in the food-order group and 1.2 kg (1.6%) in the standard group, with no difference.
What about just eating more vegetables?
Body weight did not change
An analysis that pooled 7 trials where people ate more fruit and vegetables found no difference in weight change compared with those who did not. Adding vegetables without cutting other food did not lead to weight loss.
What the first vegetables were made the difference
A low-calorie salad cut meal calories by 12%
42 people ate a salad before pasta. A low-calorie salad, with less dressing and cheese, cut total meal calories by 7-12%. A salad heavy on dressing and cheese raised them by 8-17%. The gap was biggest with a large 300 g bowl.
Summary: the calories of the first plate matter more than the order
Vegetables first helps blood sugar; weight depends on total calories
Eating vegetables first kept blood sugar lower after meals, but over 16 weeks of changing only the order, weight loss was no different from standard advice. Meals got smaller when a big, low-dressing vegetable starter cut the total calories.
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