There have been some indications that extra protein makes the kidneys work harder, which could be problematic for individuals with a history of kidney disease.
有一些迹象表明，过量的蛋白质会加重肾脏负担，这对有肾脏病史的人来说可能是个问题。
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Other beans, vegetables and nuts: One cup of cooked spinach can serve up to 5 grams of protein. Half a cup of kidney beans provide 7 grams of protein.