In Dave Asprey's book "Super Human" he talks all about living longer, optimizing health and even looking better.
He claims that a simple dye known as Methylene Blue is a skin optimizer and makes a noticeable difference. Just mix a few drops into your night cream and body lotion.
Page 239 of Super Human
Also, here a link to the article I mentioned about using Methylene internally: http://bit.ly/MethBlueArticle
