It's d_____that eating less can help you remember more.

It's d_____that eating less can help you remember more.
It's d_____that eating less can help you remember more.

It's d_____that eating less can help you remember more.
discovered
据发现表明吃少一点可以帮助你记忆更多.
没有语境,很难说填哪个单词.

discovered.

distint