Everyone loses hair each day, so there’s no need to freak out every time a few follicles trickle out. Hair is continuously growing, but, in turn, some strands reach their “old-age” and come out. Genetics, however, means some guys have fewer strands growing in to replace them. By the age of 35, two-thirds of American men will experience some level of hair loss, according to the American Hair Loss Association. But have no fear—nutritional deficiencies can contribute to increased hair loss by weakening hair shafts that cause breakage and slow re-growth of new hairs. This can potentially be reversed with the right diet. Len Glassman, a certified health nutritionist, trainer and owner of the Personal Best Training Center, offers up the necessary nutrients that will keep the hairs on your head there longer.