As goes the body, so goes the brain. Or something like that.
The image above is from a study looking at the brains of adolescent smokers. Clearly, smoking is bad for the brain - and the brain is already malfunctioning, adding smoking just makes it worse (imo).
This article looks at the high incidence of poor lifestyle choices in the severely mentally ill (smoking, drinking, drug use, obesity, etc.). The paper suggests "the benefits of lifestyle interventions based on diet and exercise designed to minimize and reduce the negative impact of these risk factors on the physical health of patients with severe mental illnesses."
I would add that a healthier body can contribute to a healthier brain - it's time to end the body/brain split (mind = body/brain and a whole lot more), and this is a small step in the right direction.
Efficacy of lifestyle interventions in physical health management of patients with severe mental illnessFernando Chacon, Fernando Mora, Alicia Gervas-Rios and Inmaculada Gilaberte
Annals of General Psychiatry 2011, 10:22. doi:10.1186/1744-859X-10-22
Published: 19 September 2011