Is cholecalciferol in Dr. Berg Vitamin D3 & K2 toxic for humans?

Cholecalciferol has been used as a poison for pest control of rats. However, cholecalciferol is non-toxic to humans, if taken in a proper dose.

Cholecalciferol is vitamin D3.  Vitamin D3 is the natural form of vitamin D formed in human skin due to UV radiation of 7-dehydrocholesterol.  The vitamin D3 used in our products comes from lanolin, sheep's wool, which processes UV rays to D3 similarly to humans. In humans, very high doses can be toxic. Rats require far smaller doses of cholecalciferol for it to become toxic than it does in humans.  Cholecalciferol can be thought of similarly to cacao, which makes chocolate.  The right amount greatly benefits humans, but even small amounts of cacao can be lethal in animals.