DS Laboratories Spectral CSF Revitalizing Serum for Women 60mlAccording to recent studies, 60% of women experience noticeable hair loss by the age of 40. The American Hair Loss Association recognizes that hair loss in women is a serious life altering condition that can no longer be ignored. DS Laboratories, after years of investigation, has developed Spectral. CSF, a novel serum that helps women achieve fuller, thicker looking hair for a more youthful appearance. Spectral. CSF is a dermatologist formulated water