Ok, sometimes a controversial topic.
Abilities can be altered?
Not by mean anything like Rule of Ted: http://metaex.yolasite.com/limitations-and-exceptions.php
But asking if abilities can be altered by non- physical ways? (you know probably things like nutrition and drugs could), As altering an ability power level, doing something to reduce or enhance it, or even block it.
In other words, abilities can be reduced, enhanced or blocked by other means than physical?
Let me know your opinion in the comments.