By drinking this you transmigrate to another world!
*One time change for your entire body, how it looks everything including changing your sex if you wish as that is common in isekai's. Optionally you may be reborn in the isekai you've chosen but you would look similar to the parents you've chosen only with their best genes to avoid unnecessary drama.
*All of your mental illnesses or sickness are cured this one time and the drama of leaving behind everyone you knew and loved is severely lessened.
*You only gain an muscled appearance if you want to when working out, but otherwise you're stuck with the body you chosen before making it very easy to stay in shape.
*If your Isekai world has a class system yours will be Hero, boasting the highest stat gains and growth rate possible while allowing you to learn and use all magic.
*If your isekai world doesn't have a class system you can still use all magic and your gains are noticeably higher than the average human.
*Despite all the above as if getting a helping boost by a friendly god you are now x3 captain America with a very good memory and recall but not perfect.
*You have absurd luck, able to get into events that could prove very advantages towards your goals and you will never die unheroically via mundane means as if the world wants to keep you around until the plot deems your death necessary.
*Optionally you gain access to the Hero BBS board with all that entails and yes...this means that the isekai world you chose can be reached by them if they can dimensionaly travel that is.