Is it a scientific fact? Do all the atoms and molecules in your body get replaced every seven years? Not all at once of course, but over an average lifetime the atoms will be swapped out over about seven years. They must come from somewhere, food, drink, respiration, as we grow up and gain mass, then people tend to shrink a bit as they get older. So obviously people lose atoms and molecules via bodily waste, then blood transports food and oxygen around the body and helps to convey away waste from cells (this is where the lymphatic system is working too). The blood brain barrier prevents blood getting into the nervous system, but there must be a mechanism to get oxygen and other nutrients and waste in and out.

When I first heard the statement I wondered if it could be true? But I’ve heard it again and again. I could fact check it, but I’ll take it as truth. So if molecules can change can we really say we remain the same? Does that not mean that a Leopard CAN change its spots? We can change our minds, change our behaviour. You don’t have to be limited to one train of thought because you literally HAVE changed!