The boy was taken to the Rocky Mountain Poisoning and Drug Center, where Dr. Thomas Knappe and Dr. Christopher Hoyte came to this conclusion because of the high levels of THC - the psychoactive ingredient in marijuana.
It is the first recorded infant death from marijuana overdose, certified by two doctors in Colorado.
An 11-month-old boy died of a sudden heart attack, while doctors claim that this death was caused by high levels of marijuana in his body.
The parents admitted to having drugs in their possession, but allegedly were unsure if their child had eaten marijuana in any way.
Marijuana use has been shown to worsen chest pain for those who already have heart problems, but this is "one of the few things scientists know for sure about marijuana and cardiovascular health," according to a Harvard University spokesman.
Nevertheless, deaths directly caused by this drug have never been reported.
This case study with an 11-month-old child is the only one that has existed, while the studies dedicated to the effects of cannabis in people under 18 years of age are minimal.