Yes, if people have addiction history in their lives or their family history they should not be able to purchase large amounts of these products. Tobacco should have more restrictions against 18 year olds, even though they cannot legally purchase it many still do.
High Blood pressure
Diabetes
No one is sure positively sure. Although buddhist are found to cleanse their soul and let is connect with life, relious people also believe that evil comes to those who are troubled, thinking that there soul was eaten.