Oh please. Energy from food gets stored in fat molecules, that&#x27;s true, but it&#x27;s not like physics decrees exact equality in people&#x27;s outcomes. Someone who digests less efficiently will receive less nutrition from the food they eat. People with tapeworms manage to put on less weight than you&#x27;d expect from their diet, for example, and it doesn&#x27;t seem to be worrying any physicists I&#x27;ve met.