Sugar, followed by salt.
Nicotine is the most abused substance and its use causes the most diseases and deaths.
Many people mistakenly believe that it is alcohol. However, nicotine is the most abused substance and its use causes the most diseases and deaths.Read more: Most_abused_substance_in_the_us
Nicotine, by a very wide margin.
Tobacco
By a substantial margin, alcohol is the most widely abused drug in every age group—including children. However, marijuana is the most widely used illicit substance among all age groups, but “club” drug use is increasing.
alcohol
dog
cocaine
crystal meth is probably the most abused as its highly addictive. but crack cocaine is also among the top.
cocaine
marijuana.
ANY substance that is being abused can be an addiction.