The generally accepted improvements from colloidal metals are as follows:
COPPER: Recovery of hair follicle strength and sometimes color
NICKEL: Recovery of hair follicle color
SILVER: Anti-microbial and anti-bacterial properties
GOLD: Increase in brain and neuron functionality
PLATINUM: Decrease in spinal column and vertebrae pain
One may purchase pre-made solutions on the internet, MesoSilver being a great choice - or one may build their own generator (search online for instructions) and introduce an electrical current to the metals for the production of said colloidal.