I have friends that are honestly convinced that one slice of cake that weighs about a quarter of a pound, including frosting and beung very rich, can make you gain at least a pound of weight.
I say physics makes that impossible. Technically you can gain 1/4 pound from that, most of which will quickly be digested and go away. They think I'm crazy and deluding myself. I'm saying it's not possible gor something to cause you to gain more weight than the item weighs.