Are there any health risks with the use of the product Toppik ? ...

I agree with the prior  esteemed hair experts. I would just like to add that the potential of developing folliculitis or some degree of infection of the scalp increases if toppik is left on the scalp for a prolonged time. In addition, you cannot use Minoxidil or inject steroids or PRP  after toppik  has been placed. Hope this helps. Good luck.

Keratin fibers are quite safe. They must never be ingested or inhaled. There is a theoretically risk of sensitivity to the dyes used to color the fibers but this is extremely rare.IN general cosmetic fibers (.....there are many on the market!!!) may contain various FD&C and D&C dyes and some fibers contain DMDM hydantoin (a formaldehyde releaser) and iodopropynyl butylcarbamate (a cosmetic preservative) in addition to other ingredients. The frequency of problems with these additives is likely very very low. 

There are no risks associated with the concealing or camaflauge products, other than you may be allergic to the ingredients of the product.