Deep conditioning is truly on a case by case basis,” says Lee. “It’s more important to respond to what your hair needs versus just having a frequency that you’re aiming for. Everyone’s hair needs are different, and weather/environment are variables that affect changes in our hair. Deep conditioners are important because they replenish what may be lost in our hair. It’s important to lock those ingredients that products provide into our hair so that it can thrive and flourish.