Blunt statement ahead:
[airquote] I think that any fast acting supplement is fast acting both ways.
And that feed-back mechanisms in your body may down regulate the effects as well. So, in case you stop suddenly, you could very well end up in a worse position compared to where you started from. [/airquote]
Maybe this cannot be stated generally and studies are hard to find that back this up. Studies that are short termed anyway and seem to not deal with withdrawal effects.
This is the reason I stopped thinking of taking nootropics for instance.
Your opinion please.