&gt;What you put in your face is directly responsible for how fat you become.<p>To be equally pedantic, it&#x27;s not <i>what</i> you &quot;put in your face&quot;, but <i>how much</i>.  Microbes are a factor in weight gain and weight loss just like diet and exercise are also factors.  There is no &quot;one simple trick&quot; to lose weight, there are a variety of factors that, if understood, can help us understand the safest, most efficient ways to maintain a healthy weight.