Many many thanks to Dave and Hege for the text of the paper. What does it say?
OK, they did a single 24h dietary recall and they ain't telling us anything about the results except for diet "type" predominant in each group. So they have discovered the Masai eat low carb high fat, the Bantu subsistence farmers eat high carb, low fat and urban Bantu probably eat junk. I simplify.
They also noticed the Masai walk a long way everyday and the urban Bantu don't. Cracking stuff this.
They took random bloods and found exactly what you would expect, deteriorating lipids from the "excellent" values from the high fat/LC Masai down to the "worst" lipids of the urban Bantu. If you believe the sort of lipids they're measuring are "good" or "bad" per se. They forgot to check HbA1c.
After that it's an ad hoc hypothesis that walking makes a lethal dose of saturated fat give you the "best" lipids in Africa. A bit like saying the French are protected from heart disease by all that red wine they drink.
The job of observational studies is to generate hypothesises. This one generates an ad hoc hypothesis to explain a non existing paradox. The well known effects of high fat low carb diets on blood lipids have been documented in the obesity and diabetes literature so many times now that you wonder why Mbalilaki has not been sacked on publication of this study for ignorance of the current intervention studies. Just pubmed Volek or Westman to catch a few.
How do you sum up this paper? Line one of their introduction:
"Despite overwhelming evidence for a link between intake of saturated fat and coronary heart disease... blah blah blah"
Translation: Haven't read the literature.
The Norwegian Centre for International University Co-operation and the Swedish Council for Working Life and Social Research funded her jaunt to Africa. I hope she enjoyed it as much as we did our walking safari in Kwazulu Natal in pre Squiggs days.
She wins hands down over Gibney.
This girl will go far.
In the Drankensbergs, nice hill walking.