There's a connection between marijuana and schizophrenia, and as scholars tease out the chicken-and-egg genetic aspect, they counsel teen tokers to take heed.
Advances in the field of epigenetics show that environmental contaminants can turn genes "on" and "off" triggering serious diseases that are handed down through generations. But there's also a more heartening prospect: The same diseases may be treated by relatively simple changes in nourishment and lifestyle.