Interesting result reported from Arizona State University. Scientist at ASU have used artificial mutations on existing proteins that bind ATP (the body's energy source) and rapidly selected the results. Rinse and repeat increase selection so you see the best at "survival of the fittest". This way they improve on nature's natural rate of mutation and selection.
In no time, they found a protein that is extremelly stable and binds ATP twice as much as the natural one. Interesting...
Even more interesting is that they start thinking they can probably do this for any protein in the human body, today. So they could find better ways to speed metabolism, transport oxygen, increase mental capacities by just tuning existing proteins.
The 10 million dollar question becomes: how do you bring those protein blueprints back in your body? You are talking about serious tinkering at this point.
Sign me up Scotty!