Solve the riddle:
I am something people love or hate. I change people’s appearances and thoughts. If a person takes care of themself I will go up even higher. To some people, I will fool them. To others, I am a mystery. Some people might want to try and hide me but I will show. No matter how hard people try I will never go down.
What am I?

Below you will find a hint and the correct answer to the riddle.
Little hint:
Show Hint
Hint: A*e.
Right answer:
Show answer
Answer: Age.