What are the most effective behaviors to reduce cortisol? Well, we talked about, one, to restrict cortisol the early part of the day, which is viewing morning sunlight. But how would you buffer cortisol in the late afternoon? It's going to be all the things associated with reducing stress. For instance, 10 minutes or even-- my laboratory and other laboratories have shown is even five minutes a day of just what would be called mindfulness meditation, very simple.