Hi Julia,
I appreciate your perspective on this. And what an adventure!
I really wish that I'd been more diligent about my sun protection during my bike touring days, but such is life. Hindsight really is 20-20.
And I'm sure toe cream isn't that far off seeing as retinol can be found as a selling point for a good number of body products now.
Whenever I'm tempted to try out the newest hyped up product though, I'm usually successful in not going there once I find out that unsurprisingly it lacks the dermatological studies to back up 10% of the claims on the label.