Avalon Avogain 5% Spray Solution 50 ML Avogen Spray for the treatment of hair loss and baldness is a treatment of alopecia chin, head and beard. That spray one of the types of solutions that have been used to visit and improve the hair germination process to increase hair density. Avogen is a local solution used on the scalp and sometimes on the face and skin in cases of alopecia. This is done by stimulating hair follicles to grow and encouraging hair intensification.