ok so i got a free sample of this at sephora and i loved it! but now i'm out and want to buy a whole tube. but its expensive so i want i want to know is are my lips getting used to the ingredients, so in the future they wont have as much of a reaction? or will the product continue to work just as well?

The product will actuallly get better. The more you use a lip plumper, the more long term effects it has! Your lips will grow fuller in about a month to where you could go a day without using it and they would stay plumped. I've been using Two Faced extreme lip plump for a about a month now and i love the results! (: