All of the treatments for this dandruff condition consist of chemicals that are put into wood in order to keep marine life growing on them. Selenium, zinc, coal tar, creosote, and copper. Copper disrupts the major metabolic pathways of invertebrates. I don’t think that the copper is what is responsible for the death of the yeast that causes dandruff, it is the selenium that naturally occurs in elemental copper deposits. The selenium is what is found in selson blue and shampoos like it.

Other possible cures may be a comb made from the lead-free brass used for plumbing (for the same reasons as what I suspect for the copper comb) or a comb made from the dense creosote tree, which is impregnated with resins that kill microbes like this.

I really hate how the beauty industry has us “hooked” to cures that have to be replenished regularly. I want a comb, (not a brush, which is plated with copper) as I only want to buy my solution once. The same thing happened with tampons, apparently women all used natural rubber cups http://www.divacup.com/ at one point, but reselling pads and tampons every month was a more profitable solution to an issue that was already solved.