Wed, Mar-29-17, 07:22
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Plan: P:E/DDF
Stats: 225/150/169
BF:45%/28%/25%
Progress: 134%
Location: NC
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https://www.dietdoctor.com/dr-harco...ed-heart-health
Dr. Harcombe on the Tsimane Study and Why Carbs Are Not the Answer to Improved Heart Health
Zoe Harcombe's response:
http://www.zoeharcombe.com/2017/03/...-heart-disease/
Partial quote
Quote:
South American tribe & heart disease
March 27, 2017
The headlines on Friday 17th March were effectively “Call off the search – we’ve found the healthiest hearts in the world.” They had been found in the Tsimane people of Bolivia. The headlines came from a study in The Lancet, the summary of which can be seen here. I’ve got a copy of the full PDF to save you the bother.
The study
This was an impressive study – at one level anyway (the nutritional/diet part was another matter, as we’ll see). Researchers had examined the people of Tsimane – a Bolivian population living what was described as a “subsistence lifestyle of hunting, gathering, fishing, and farming…” The researchers managed to study 705 Tsimane people and compare them with 6,814 participants in the Multi-Ethnic Study of Atherosclerosis (MESA) to contrast a subsistence population with men and women from six communities within the American population. The main measurement was Coronary Artery Calcium (CAC), as an indication of coronary atherosclerosis. CAC scores higher than 100 were considered representative of significant atherosclerotic disease.
I say “managed to study” because that was one of the aspects that most impressed me – the Tsimane Health and Life History Project team (THLHP) has been working with this population since 2002. The researchers explained that the high participation rate was due to: i) long term trust established; ii) free access to medical specialists who helped with other ailments; iii) free food, travel and lodging while attending the assessments; and iv) compensation for the participants in the form of tools, needles and yarn – high value items when living off the land.
The results of the CAC scans were that 596 (85%) of the 705 Tsimane had no CAC; 89 (13%) had CAC scores below 100 and 20 (3%) had CAC scores higher than 100. This was a five-fold lower prevalence than the industrialised populations studied. The researchers reported other findings: mean LDL and HDL cholesterol levels were 2·35 mmol/L (91 mg/dL) and 1·0 mmol/L (39·5 mg/dL) respectively. Additionally obesity, hypertension, high blood sugar, and regular cigarette smoking were rare.
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