John Durant at Hunter-Gatherer found a great video about gorillas fed mostly processed food for years improving their health when returned to an original diet. David A Gabel of ENN writes:
After a 21 year old gorilla named Brooks died of heart failure at Cleveland Metroparks Zoo in 2005, a group of researchers decided to examine how the gorilla’s lifestyle affect their health.
For decades, zoos have fed gorillas bucket loads of high vitamin, high sugar, and high starch foods to make sure they got all their nutrients. At the Cleveland zoo, they have started feeding food such as romaine lettuce, dandelion greens, endives, alfalfa, green beans, flax seeds, and even tree branches which they strip of bark and leaves.
Watch these gentle giants and the progress they are making: