James Laughlin explains why there's no universal timeline for breaking a habit. It depends on the specific habit, your motivation, your environment, and how often you face triggers. Some people quit nail-biting overnight; others take months with setbacks.
Chapters
And I don't know that we'll ever have evidence to show how long it takes us to break a habit and the reason for that is it is so individualized not only by the habit that you are wanting to break but by you as an individual things that will factor into that is how motivated you are to change it how much you want to change it how supportive your environment is are you being triggered all the time and having to resist that because that's going to be a lot harder than if those triggers aren't there altogether you know how much that habit aligns or disaligns with your identity. You know I've worked with people who have broken their unwanted habits overnight and it's been incredible things like nail biting they've just stopped. I've worked with others who have taken months to break unwanted habits because they had lots of lapses and they didn't have a supportive environment for example so it there's no answer to this which sucks.