Although the VA provides for the use of direct service connection in VA claims for a wide variety of disabilities, there is one glaring exception: veterans may not claim a service connection for any conditions caused by tobacco use during periods of military service. Under no circumstances can tobacco consumption by any method be used in the nexus of evidence for VA claims. This rule also applies to survivors seeking benefits after a veteran has passed away due to a tobacco-related illness.
However, this restriction is not quite as ironclad as it sounds. Although the VA cannot grant a service connection for disabilities that depend on tobacco use to prove linkage, it is possible for claimants to receive veterans benefits for tobacco-related conditions through other strategies.