Why does Botox last longer for some patients than others?

There are several factors that contribute to result longevity, but I’m unaware of any medical research that points to a specific gene that directly affects this. Some factors that I am aware of that influence longevity include the following:frequency of treatment - the more treatments that have been performed in a patient’s experience, the longer results last with every subsequent treatment the amount administered - the number of units should be accurately administered for the patient your metabolism - the faster your metabolism, the faster your results may fade 

 Thank you for your question. I believe the greatest determinant of how long Botox works, is the dosing that is used and injecting it into the correct target muscle.   There are some injection points were you purposely do not want a full correction, as it may cause undesirable effects. Examples include the forehead lines where causing too much of a correction may result in brow heaviness.  I tend to use higher doses in areas where there is more muscle mass.  I would recommend that you visit with a board-certified plastic surgeon or dermatologist in your area who can discuss your specific concerns.