以下の文、解説お願いします。
Despite all the warnings, people continue to consume junk food more than ever.
As a result, while models and actors get thinner and, ironically, more is known about nutrition than before,
America is getting fatter.
訳はわかります。
2つ目のセンテンスでmore is known aboutの部分を教えてください。
よろしくお願いします。
