Normal packs have 20ish mg of nic, and when I started vaping, I was dosing with 60mg a day and didnt even notice. Just wondering about long term health issues of constant/higher nic levels. Will 80mg/day affect me negatively in the long run? I know nic makes you think sharper and such...whats a good dosage for aiding the brain but not succumbing to too much nicotine?