The intestinal microbiota in aged mice is modulated by dietary resistant starch and correlated with improvements in host responses - Tachon - 2012 - FEMS Microbiology Ecology - Wiley Online Library
But the full-text costs $$. Anybody have it?Abstract
Dietary interventions might prevent or reverse age-related declines in health through modification of the activity and composition of the intestinal microbiota. As a first step toward more comprehensive evaluations of single dietary components on healthy aging, 16S rRNA gene amplicon sequencing was applied to determine the structure of the bacterial communities in the ceca of 20-month-old healthy mice fed energy-controlled diets containing 0, 18, or 36% type 2 resistant starch (RS) from high-amylose maize (HAM-RS2). The cecal microbiota of mice fed a diet depleted in RS and containing the readily digestible carbohydrate amylopectin were dominated by bacteria in the Firmicutes phylum and contained low levels of Bacteroidetes and Actinobacteria. In contrast, mice fed diets containing HAM-RS2 were colonized by higher levels of Bacteroidetes and Bifidobacterium, Akkermansia, and Allobaculum species in proportions that were dependent on the concentration of the dietary fiber. The proportions of Bifidobacterium and Akkermansia were positively correlated with mouse feeding responses, gut weight, and expression levels of proglucagon, the precursor of the gut anti-obesity/diabetic hormone GLP-1. This study showed that aging mice harbor a distinct microbiota, which can be modulated by RS and enriched for bacteria that are associated with improved health.
edit: just stumbled across this: http://www.nature.com/ajg/journal/v9...g2000259a.html
Dietary starch that escapes digestion in the small intestine may be quantitatively more important than dietary fiber as a substrate for fermentation. The products of fermentation have important implications in the pathogenesis of colorectal cancer and other diseases of the large bowel, which are uncommon in Africans but have a high prevalence in Western populations.
Maize porridge is a staple of most blacks in South Africa. Stale maize porridge (high-resistant starch [HRS]) seems to induce greater fermentation in the large bowel than fresh maize porridge (low-resistant starch [LRS]).
In the present study, healthy colostomy subjects fed stale maize porridge had significantly more production of short-chain fatty acids (SCFA) (mean SCFA, HRS = 182.6; mean SCFA, LRS = 116.1; p < 0.05) in their colostomy effluent together with a significant drop in stool pH (mean pH, HRS = 5.91; mean pH, LRS = 6.70; p < 0.001). The SCFA butyrate (mean, HRS = 35.1; mean, LRS = 17.6; p < 0.05) and acetate (mean, HRS = 93.9; mean, LRS = 65.8; p < 0.05) were significantly elevated on the stale maize porridge diet when compared with consumption of fresh maize porridge. SCFA propionate (mean, HRS = 43.1; mean, LRS = 24.8; p = 0.05), also increased with stale maize porridge, but was not statistically significant.
A high-resistant starch diet and its resultant increase in fermentation products may be partly responsible for protecting the black population against colorectal cancers and other large bowel diseases.
Last edited by otzi; 01-26-2013 at 09:16 AM.
Please, this is all just about increasing my knowledge of a 'new-to-me' food item (RS).
I have spent the last hour searching PubMed for RS contents in foods, but so far, every article that I find is 'abstract-only', but the sheer amount of papers on RS is amazing.
Yes, a diet of raw potatoes and cold corn porridge would be pretty rough! But if including something like this in nominal amounts brought great reward, wouldn't it be worth it? Your pate' would make some people barf! I read many comments on here from newby's about 'bone broth--gross!' or 'I can't do liver', but they are soon converted when they learn of it's benefits.
So, RS Queen, in your estimation then 5g is enough to make a noticeable difference for you? Have you tried bigger (30g) doses?
Amazing how people materialize just at the right time to "rescue" a thread, isn't it?
The slaves were fed that because it was cheap not because it was health food. Get real.
Yes, I do think about and seek out novel ideas. That is why I am trying carnivorousness. My digestive system is very happy about ditching the fiber laden CW.
And don't you go insulting my pate'. That's just not nice.
A person who eats mainly cornmeal and fat(unless it is nixtamalized corn meal, as the Native American's well knew) will become nutrient deficient and very sick. (Lysine and Niacin deficiency.)
Just ask the Spanish... they tried that shit.
You have to have other food sources. Meat, potatoes, legumes, somethin.
In the south there was a lot of field/cow pea eating with that corn meal.
The white men considered field/cow peas animal fodder. They were fed to the slaves as well as the animals.
“You have your way. I have my way. As for the right way, the correct way, and the only way, it does not exist.”
And that's why I'm here eating HFLC Primal/Paleo.
Hushpuppy Nation » What Did Slaves Eat? :
andThe food provided to plantation slaves varied widely depending on several factors: time period, location, what food the plantation produced, and the owner’s economic situation all came into play.
Frederick Douglass, the escaped slave and abolitionist, wrote in 1845: “The men and women slaves received, as their monthly allowance of food, eight pounds of pork, or its equivalent in fish, and one bushel of corn meal.”
In The Life of Josiah Henson (1849), Henson, who was born a slave in1789 in Charles County, Maryland, wrote: “The principal food of those upon my master’s plantation consisted of corn-meal and salt herrings; to which was added in summer a little buttermilk, and the few vegetables which each might raise for himself and his family, on the little piece of ground which was assigned to him for the purpose, called a truck-patch.”
On coastal plantations, like those in the South Carolina Lowcountry, broken or dirty rice was plentiful and was a staple of the slave diet.
Archeological evidence from excavations of slave cabins at Ashland Plantation in Louisiana shows that in some cases slaves added to their diet by fishing and trapping. The bones of opossums, raccoons, rabbits, wild birds and fish such as freshwater drum, gar, catfish, sunfish, and mackerel have been found at the site.
In Flowerdew Hundred: The Archaeology of a Virginia Plantation, 1619-1864 (1993), James Deetz detailed archeological findings of food remnants from slave cabins at Flowerdew Hundred plantation on the James River near Hopewell, Virginia. Deetz found the foods most often eaten by slaves at Flowerdew Hundred, based on the amounts of identifiable remains, were pork, catfish, various types of birds and fish, sturgeon, chicken, beef and opossum.
Deetz also found evidence that slaves on this plantation also regularly supplemented their diets by trapping and fishing as well as by keeping pigs and maintaining garden plots.
According to Patricia A. Gibbs, a former member of the research staff at Colonial Williamsburg, there is documentary and archaeological evidence that slaves grew a variety of plants in these gardenssuch as lima beans, pole beans, cabbages, collards, corn, cymlings (patty pan squash), onions, peanuts, black-eyed or other field peas, potatoes (both Irish and sweet), and pumpkins.
Lots of money being made on Raspberry Ketones and Green Coffee Bean Extract, not so much on RS.
For some reason, everyone is putting the onus on me to prove the point, when all one would need to do to shut me up forever (well, maybe just for a minute) would be to show a couple studies that say RS is bad or not needed. None out there, I've looked.