/johnny
I remember reading about Sardines, back in the 1970s. They are apparently very high in ribonucleic acid. I used to buy the little brislings, rinse them off in cold water, and eat.
Supposed to be an anti-aging very healthful thing.
(They were good, too!)
I think these were the ones I bought:
http://www.amazon.com/Crown-Prince-Brisling-Sardines-3-75-Ounce/dp/B000EF3E2W
-JT