Howdy. I've been a hiker for as long as I can remember but the last 4 years I have been seakayaking and seakayak camping much more than hiking and backpacking. I haven't had huge issues with blisters before but lately my 'baby feet' are giving me a headache after just a couple of hiking days. Given the fact that I am planning for another 17 day hike this summer I have been slightly paranoid about my feet. I started thinking whether I can toughen up my feet a little bit before the long hike when I found this post on about.com :
Tannic acid to toughen: Marathoners and long distance walkers may want to toughen the feet with 10% tannic acid or a tea soak. Apply the tannic acid to your feet, or soak in strong tea, twice daily for two to three weeks.
Has anyone tried doing this and if so ... was it effective and where did you buy tannic acid?