<P> When turned into a vampire, Dean had greater strength and all of his senses were advanced . As a human, Dean was the bearer of the Mark of Cain; this granted him extraordinary strength, allowing him to fight on the level of a supercharged angel like Metatron . He also had several psionic abilities, the most notable of which is being able to summon and call the First Blade to him granted it is reasonable range . These powers also included premonitions given in dreams and immunity to both magical and demonic powers . As a demon bearing the Mark of Cain, Dean's strength was multiplied from the time he was a human, allowing him strength on par with, if not greater than, the Knights of Hell . His demonic powers also included a degree of telepathy, being able to read an individual named Lester's mind and learn his history with Sam upon meeting him . During his time as a demon, Dean also possessed the ability to easily regenerate from wounds and as his corrupted soul was possessing his own body, he was exempt from exorcisms that plagued other demons . </P> <P> Dean is a skilled and highly resourceful hunter . He is well - versed in multiple types of firearms; he prefers his Colt 1911 and sawed - off shotgun, but is proficient with most other weapons he might acquire . He is also adept with brawling and knife fighting, and has subdued several human assailants with ease and bested physically more powerful creatures such as shapeshifters, vampires and demons . He frequently utilizes improvised weapons and explosive devices; in "Croatoan", he demonstrated knowledge of chemistry, constructing Molotov cocktails and improvised explosive devices, and in "Phantom Traveler", he revealed knowledge of electronics and reverse engineering, having built an electromagnetic field detector from an old Walkman radio . Dean also possesses extensive knowledge of the supernatural and mythology, and from season 4 onwards learns and is able to perform spells that are effective against angels . </P> <P> Dean's work as a hunter requires him to impersonate various occupational roles in pursuing his investigations and avoid the attention of law - enforcement . To this end, Dean is well - versed in how police, fire departments and various government agencies (FBI, CDC) typically operate and conduct investigations . In supporting this lifestyle, Dean is also skillful in lock picking, breaking into security systems, carjacking and hustling for pool . Due to his time spent in Hell as Alistair's "student", Dean has an in - depth knowledge of torture . Dean is also an accomplished mechanic and maintained an intimate knowledge of automobiles and engines since childhood; he maintains his Impala in top condition . </P>

How old was sam and dean when they started supernatural