Key points from article :
Tsimane people in the forests of Bolivia rarely signs of clogged up arteries – compared to 25% of 45 year old Americans.
16,000 Tsimane hunt, fish and farm on the Maniqui River in the Amazon rainforest.
They get 72% of their energy from carbohydrates.
Tsimane are far more physically active averaging over 16,000 steps a day.
The study was published in The Lancet journal.