Stem cells in skincare products – should we believe the hype?  Dr Haran Sivapalan takes a look at the science behind the claims.  Ever wonder how a single cell, formed when a sperm fuses with an egg, manages to grow into a fully formed human, replete with a muscular, beating heart, a brain full of nerve cells and cased in skin and hair?  How does an embryo, made of just a few identical cells, eventually give rise to such a wide variety of tissue types? The answer lies in stem cells. But you won’t find these ‘human embryonic stem cells’…