I have delved a little deeper into this issue and here is what Dr. Deepak Chopra has to say in his book 'Creating Health.'
`Data on the impairment of the immune system from the habitual use of marijuana has not received the publicity it deserves. In a significant finding by one Columbia University study , the antibodies produced by marijuana smokers declined drastically during one month of heavy use. When smoking was totally discontinued, however,the antibodies only returned to normal levels very slowly, and even five weeks later there were signs of decrease. Althought this finding of immunotoxicity(damage to the immune system)is most striking in the case of marijuana ,it is apparently induced by other drug addictions as well. Unless attitudes towards drug taking change signifcantly, we face the prospect of large numbers of people who use recreational drugs becoming highly susceptible to disease...
~I believe alcohol is a toxin . It impaires clear perception and motor coordination. It has poisonous effects on the heart, liver and brain that do not seem to be reversible. It contributes to sensless deaths from automobile accidents that number twenty -five thousand fatalities a year. Anything that harmful ,even in small doses, is not a legitimate part of perfect health; therefore, I recommend complete abstinence from alcohol...
Something to think about!