If you eat about a handful of walnuts every day for six months, you might gain only half a pound — way less than you'd expect from the extra calories, which probably means you end up eating less of other foods without realizing it.

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Pro

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Against

Evidence from Studies

Supporting (1)

51

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51

Does regular walnut consumption lead to weight gain?

Randomized Controlled Trial

Human

2005 Nov

The study found that people who ate a handful of walnuts every day for 6 months only gained about 0.4kg, much less than the 3.1kg you’d expect from the extra calories, suggesting they naturally ate less of other foods.

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According to GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this specific claim, ordered from strongest to weakest evidence.

Source Study

Does regular walnut consumption lead to weight gain?

Score: 51

DOI: 10.1079/BJN20051567

Similar Assertions

If adults eat 35 grams of walnuts every day while living their normal lives, they end up eating about 133 extra calories per day — but they don’t gain as much weight as you’d expect because they naturally eat a bit less of other foods.

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Eating a small handful of walnuts every day for six months might slightly increase your BMI, but doesn’t seem to change other aspects of your body like muscle or fat in a noticeable way.

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