Googling produces a ton of results, but here&#x27;s one that looks pretty reputable (USDA, based off many other studies): <a href="http:&#x2F;&#x2F;www.sciencedaily.com&#x2F;releases&#x2F;2001&#x2F;05&#x2F;010511074623.htm" rel="nofollow">http:&#x2F;&#x2F;www.sciencedaily.com&#x2F;releases&#x2F;2001&#x2F;05&#x2F;010511074623.ht...</a>