Your Thoughts Can Change Your Appearance
I've said this for years. It is a simple as being happy vs. sad you can physically see but also more subtle ways. How you look in the mirror and what you say to yourself like " I am getting old" your mind will literally give you that. Start simply saying I look and feel so youthful and believe it. I do this every time I look in the mirror, do my make up and even shower. I like to say, "thank you for my beautiful youthful looks."
Here is a little bit more of a deeper dive into it.