“”Apply directly to forehead. HeadOn, apply directly to forehead! HeadOn, apply directly to forehead! HeadOn, apply directly to forehead! HeadOn, apply directly to forehead! HeadOn, apply directly to forehead!
HeadOn is a topical homeopathic medicine, meant to cure headaches. It claims to have a "clinically proven active ingredient for topical headache relief" inside it. However, there have been no peer reviewed studies showing it does anything beyond the placebo effect.
It consists almost entirely of wax, with a few plants and potassium dichromate, a substance that causes cancer. However, the quantities of its non-wax ingredients are measured in parts per trillion, akin to putting an eye dropper amount into 5 Olympic-sized swimming pools.
The same people who make HeadOn also have made other quack products, especially in treating arthritis pain. Most people probably know of HeadOn for the constant spam of
amazingly awful commercials. 
 See also
- ↑ Including commercials making fun of their own commercials