Updated a year ago

There is no barrier, you can pursue an MBA at 43 or any age. it depends on your goal, Why do you want to pursue an MBA?
At 43, if you are a working professional, the reason for pursuing an MBA can be you want a promotion and a higher salary that you might not be getting because of not having a postgraduation degree. Another reason can also be whether you want to improve your business understanding or just complete your dream of becoming an MBA holder.
However, it might get difficult to leave your job to pursue a regular full-time MBA program. So, you can fulfill your dream and goal by enrolling in an online MBA program as it will be completely online, you do not need to visit the college to attend classes and you don't have to leave your current job as the online MBA provides flexible schedule learning. Do not worry about the online degree, the value of an Online MBA degree would be similar to the regular degree as per UGC.