Insulin and The Paleo-Ancestral Diet: Frasetto et al 10-Day Study
Posted Oct 07 2012 10:05pm
This site is all about evolutionary changes, health from the ancient/paleo perspective, and how our genes are imprinted to adapt and survive (whether we want to or not).
Role of Hyperinsulinemia = ENERGY DIES
Chronically high insulin (from high refined carbs, from gluten/food-stressors, hypothyroidism, low progesterone, adrenal dysfunction, metal toxicity, endocrine disruptors, etc) raises insulin resistance in our organs which can lead to increased small dense LDL, high TG and low HDLs. A cascade of further hormone changes and vascular adjustments occurs. Vascular blood pressure may increase. Pre-clinical hypertension can develop and eventually atherosclerosis ('scarring' in affected vessels) and diabetes (inappropriate and chronically elevated blood glucoses). Later, the natural progression of this hormonal storm of insulin dysfunction includes diabetes complications or target organs (kidney, eye, nerve damage), heart failure and heart events (revascularization surgery, heart attack, angina, sudden death, bypass and/or stent placements).
Keep The Insulin Low
Lamarche B et al wrote an editorial in 1996 (see Ref 1) and NEJM (N Engl J Med. 1996 Apr 11;334(15):952-7.) and wrote that the higher quintiles of insulin were highly associated with higher rates of atherosclerosis and heart events in the Quebec Cardiovascular trial. 67 pmol/L (= 9.3 mIU/L) was used as odds ratio = 1.0 (it's still high IMHO; goal = 4 mIU/L in other words less than ~28 pmol/L). See above bar graph (Ref 1).
Convert pmol/L by dividing 7.175 for mIU/L. More about 'normal' fasting insulin HERE.
The Lamarche B et al state "For example, an 11-fold increase in ischaemic heart disease [IHD] risk was noted among men with both hyperinsulinaemia and elevated apo B levels, these two metabolic abnormalities being common among individuals with abdominal obesity, especially when associated with high levels of visceral (intra-abdominal) adipose tissue.
Visceral (Intra-Abdominal) Adipose Tissue
What is Visceral Adipose Tissue? Do you have any? I do. On my belly. In my head... from the ravages of the high carb S.A.D., high omega-6 intoxification, high trans-fat/F*CK-TOSE intake from my childhood/teens/early-20s-30s (OK. a long time, most of my life), sedentary lifestyle, undiagnosed Hashimoto's autoimmune hypothyroidism, stress of LIFE, et cetera.
Many benefits improve on lower carb Paleo/ancestral diets. Why? It works and best matches our DNA genetic expression.
Lamarche B et al in Quebec, Canada have elucidated a few things about insulin, e.g. chronically high insulin and insulin resistance (IR).
Insulin and IR are related to high TG, low HDL, and high dense LDL and high visceral fat and high belly circumferences.
MOREOVER... More morbidity. More mortality.
From their JAMA publication (see Ref 2 and below Table 2) they showed in the Quebec Cardiovascular trial that 3 factors are highly associated with death and cardiovascular events (1) elevated fasting INSULIN
(2) elevated TRIGLYCERIDES (because these reflect HIGH dietary carbohydrates and LOW essential saturated dietary and omega-3 polyunsaturated fatty acids)
(3) apoB, any amount sdLDL, high sdLDL (refers to 'small dense LDL' not total LDL -- total LDL is total CR*P and though the authors talk about total LDL here they correct and clarify themselves in Ref #3, 5, and 8; these French Canadian investigators are not full of cr*p)
Lamarche B et al Also Showed That...
Associated with coronary plaque in the French-Canadian Quebec Cardiovascular trial (see reference list) --Ref 3: presence of sdLDL
--Ref 4: low HDL2, the 'good' large HDL particles which are highly associated with regression of disease (the higher, the better in normal bell-shaped curves)
--Ref 5: Beyond LDL... total-LDL is meaningless, only sdLDL really matters. Conventional cholesterol panels and LDL are CR*P. The lipoproteins need to be fractionated by size and buoyancy for a progressive, accurate and sensitive reliable metric.
--Ref 6: visceral fat, it'll kill ya if exceeds a threshold
--Ref 7: high fibrinogen (which reflects high carbs, low n-3, low sat fat) + Lp(a) associated with DEATH and cardiovascular events
--Ref 8: 13 years later after the Quebec Cardiovascular STUDY... only thing that matters is sdLDL... the small dense LDL subfraction... related to death and cardiovascular events. Large LDL do not matter, the authors concluded. In fact many experts believe large buoyant LDL are anti-atherogenic and antioxidants. I highly agree. The larger, the PHATTER, the merrier.
Paleo Works. In Only Ten Days: Lynda Frasetto MD et al
Why is eating a (semi) unrefined, ancient-styled diet the way to go for reversal of chronic diseases and longevity? No simple answers but Paleo lowers chronic hyperinsulinemia. Frasetto et al at the University of California, San Francisco recently published a 10-day trial comparing metabolic changes and hypertension improvements on the paleolithic diet.
Paleo controls insulin better than Zone 40/30/30 and of course WAY way better than the S.A.D.
HOMA is a measurement of insulin resistance. Paleo (despite being high carb and low sat fat) achieved a 72% reduction in insulin resistance, HOMA (p=0.07). This was a high carb, low glycemic index with carbohydrates at ~~ 200 g/day diet. It was matched to the SAD diet. What an ingenius diet trial! Lower carb of course may be preferred for those with significant insulin resistance and fat-burning challenges. Higher sat fat, IDEAL in my opinion.
In this trial (see below Table 3), in terms of lipoproteins, Trigs were still high (e.g. excessive dietary carbs in the form of honey, pineapple, carrot juice, melon and excessive n-6 mayo) and HDLs still marginally suboptimal (e.g. saturated fat deficiency). HDLs often mirror the LDL particle size.
The premise is to alter the neolithic, post-agriculture diet macronutrients and micronutrients (glycemic load, glycemic index, gluten, lectins/phytic acid, legumes and dairy). Amazing insulin changes happen.
Is this what our genes were designed for 2.5 million years to do? We don't live in a land of honey, sweets and fruit. We are meant to starve sporadically, lift heavy things occasionally, move intensely intermittently, relax daily, play, hug, make babies (umm.. do I need to elaborate?) and eat foods that our ancestors thrived on. Complying to the genetic programming and optimizing where the genes and genetic expression are screwed up will provide a reprieve in these neolithic times IMHO.
"CONCLUSIONS: Even short-term consumption [10 days worth] of a paleolithic type diet [no grains, no legumes, no dairy, low glycemic index, ALBEIT HIGH CARB matching the s.a.d. diet] improves BP and glucose tolerance, decreases insulin secretion, increases insulin sensitivity and improves lipid profiles without weight loss in healthy sedentary humans." [some were overweight UCSF medical school students]
UCSF Frasetto et al Shows Paleo Controls IR and Insulin
Compared with the 'usual diet' (e.g. standard American diet), the Paleolithic Hunter-Gatherer diets controlled insulin, HOMA (insulin resistance) better than the usual S.A.D. in overweight men and women ages 18+ years old. These results are nothing short of phenomenal in a Big Pharma-dominated medicine tradition. No drug replicates these results, especially in only 7-10 days. No drugs (except glandular, hormonal or omega-3 fish oil pharmaceuticals) are disease reversing; they serve only to band-aid and hide in my experience. In modern, conventionally-schooled medicine, no cause or pathophysiology is assigned to the disease known as hypertension. Apparently the role of insulin and refined dietary carbohydrates (or other endocrine disrupting factors) are not considered. Conventional weight loss, diet ('low fat') and exercise are always prescribed yet rarely in my observations is hypertension stopped or reversed by these means successfully and long-term. Why?
Previous blogosphere hits on Frasetto's seminal study --Dr. Mike Eades MD discussed HERE.
--My bud O Primitivo discusses HERE in Portuguese.
--And even Dr. Davis discusses HERE linking back to the inimitable, matchless Protein Power Dr. Mike Eades.
Aging and Insulin: EORS (Epigenetic Oxidative Redox Shift)
Aging and oncogenesis are related to insulin.
Brewer (Ref #10) has explained how aging is related to insulin and insulin resistance. What degrades mitochondrial efficiency?
In the modern Western diet (now currently imported globally to Europe and China along with Western diseases), high refined carbs, refined fructose, industrial pesticides , toxic heavy metals, and refined vegetable oils brimming with omega-6 PUFAs are the typical culprits adding to the insulin resistance and hyperinsulinemia burden. Chronically elevated blood insulin leads to an overall fattening effect which can calcify and harden the liver, the arteries, and many other organs (thyroid, adrenals, arteries, endothelium, vasculature, pancreas, gallbladder, brain etc).
Brewer describes "This metabolic shift is epigenetically enforced, as is insulin resistance to reduce mitochondrial turnover. The low mitochondrial capacity for efficient production of energy reinforces a downward spiral of more sedentary behavior leading to accelerated aging, increased organ failure with stress, impaired immune and vascular failuresand brain aging. Several steps in the pathway are amenable to reversal for exit from the vicious cycle of EORS. Examples from our work in the aging rodent brain as well as other aging models are provided."
Low carbohydrate diet (15%) in rodents extends longevity and minimizes tumour growth compared with S.A.D. low fat, high carb diet. See Ref #12.
Resistance training reverses aging. See Ref #13. Burn baby burn.