当然，完全不输于动物蛋白. 请看比较图，

Protein Sources in United States of America

Item	Price	Portion size to get 30g protein	Calories in serving	Cost for 30g protein
costco dry pinto beanC	25lbs for $12.89	1cup dry	480	$0.17
costco protein powder	6lbs for $25.99	2 scoops	150	$0.39
costco fresh nonfat milk	2gallons for $4.79	3&1/3cup	300	$0.50
costco nonfat milk powder	7.75lbs for $21.49	1&1/3 cup dry	320	$0.50
costco eggs	5 dozen for $4.99	8 egg whites	128	$0.62
costco boneless chicken	$2.99 per pound	4oz	200	$0.73
costco canned white tuna	12 cans for $11.59	8/10 can	140	$0.77
costco protein bars	24 bars for $19.99	1 bar	280	$0.83
organic quinoa	1lb for $1.75	8oz dry	740	$0.85
costco organic soy milk	1.5 gallons for $6.99	4 cups	400	$1.25
costco canned salmon	6 cans for $9.99	1 can	200	$1.67