High quality relationships have a powerful impact on us psychologically, emotionally and physically. The people who care about us help us take care if ourselves—how much we eat, drink, smoke, exercise and visit the doctor. Their presence make us sleep better and modulates our stress levels. Research at McGill University found that our earliest relationships dictate how we handle stress for the rest of our lives. And unmanaged stress can put a major damper on the loveliness of our hair and skin.

Think dealing with your parents is giving you wrinkles? It might just be preventing them.

MORE: How Relationships Regulate Our Behavior