Is Tretinoin the holy grail that will replace everything?

Tags:wrinkles aging skin tretinoin collagen skin tightening Peptides

Greetings to everyone, thank you for sharing knowledge. I am seriously wondering why should we use so many different anti age factors if Tretinoin is really the hero of anti aging. Are substances like PHA, AHA, Arbutin, Matrixyl, antioxidants, trully necessary if tret is actually doing everything of the above on it's own? Antioxidants? I get it, they protect the skin and work well with tret. But everything else? Why should we use them if tret is THE anti age factor and not just use vit c, tret and a good hydration  cream to avoid dryness? Thank you in advance. 

Vasanem

F, Greece