Nuteez peanut butter has been declared not fit for human consumption.
In a certificate of analysis on Thursday, the government chemist Johansen Oduor said it exceeds the maximum required limit of aflatoxin.
The peanut butter was found to be containing 28.08ppb aflotoxin, 18.08ppb more than the required limit.
Peanuts are susceptible to molds and fungus some of which are highly toxic.
A fungus called Aspergillus flavus produces a carcinogen that is twenty times more toxic than DDT, called aflatoxin.
Aflatoxins have been associated with various diseases, such as aflatoxicosis, in livestock , domestic animals and humans throughout the world .
Aflatoxins have received greater attention for their acute poisonous effects in humans.