I'm going to speak about how you can stop nail biting for good and the best nail biting treatment. Nail biting, medically generally known as "onychophagia", is a bad habit, and therefore it's something you need to do without even considering it. Most nail biters aren't even conscious that they're doing it, before damage is completed. Environmental pollutants which mimic the effects of estrogen inside our bodies are called xenoestrogens. We are confronted with these in several ways including car exhaust, pesticides, solvents (present in nail polish and remover), emulsifiers present in soap and cosmetics, plastics (think water bottles) and synthetic hormones found in birth control pills and other drugs which can be flushed into the sewers and back in our soil and water. What are some of these unwanted signs of aging? They can include osteoporosis or weakened bones, loss of muscle, weight gain that is mostly fat, bodily aches and pains, fatigue, sweating, hot flushes, decreased libido and poor sexual performance, deteriorating memory, irritability and even depression.