Your Hairstyle Could Actually Be Aging You — Here Are 11 Ways to Avoid That

"Naturally straight and limp hair gets more pronounced with age, and the longer it gets, the less volume there will be at the root," explained Ortega. He said that now is the time to reach for volumizing products, including shampoos, conditioners, and styling agents. Some favorites include Got 2b Fat-Tastic Thickening Plumping Mousse ($7) and L'Oréal Paris Volume Filler Densifying Gelée ($7), which are both applied to damp hair before blow-drying. You can also try Chi Magnified Volume Finishing Spray ($16) to dry hair for max volume and extra shine.

Another tip Ortega suggested is to keep your hair at about shoulder length to prevent it from falling flat.