Novel anti-thinning solution without minoxidil. Spectral.RS employs key active ingredients that treat and prevent diffuse hair loss and thinning caused by hormonal problems, menopause, vitamin and mineral deficiency. Light and Transparent. Say goodbye to heavy, greasy formulas and begin styling your hair however you wish. Spectral.RS treatment is easy to apply and does not weigh down thinning hair. It goes on clean and remains light.