Don't take it the wrong way but you are missing the whole point of smoking cannabis. Cannabis is a medicine my friend, is the best medicine if used correctly, adding carcinogens and toxic stuff to it its not right, it spoils the taste, the flavour and overall the whole experience. Yes, the THC gets quicker to the brain but mate, it's not worth it

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Call me a purist but i will always go for full ganja joint over mixed one.