This is why the ubiquitous high-fructose corn syrup is such a disaster for public health. The authors of this study published in The Journal of Clinical Investigation note that “Studies in animals have documented that, compared with glucose, dietary fructose induces dyslipidemia and insulin resistance.” When they examined the effect in humans they found that all the following were increased markedly in the subjects on fructose but not glucose: visceral adiposity (fat around the organs), plasma triglycerides, fat in the liver, small dense LDL, oxidized LDL, fasting glucose and fasting insulin. At the same time insulin sensitivity decreased in the subjects consuming fructose but not glucose. The authors conclude: “These data suggest that dietary fructose specifically increases DNL, promotes dyslipidemia, decreases insulin sensitivity, and increases visceral adiposity in overweight/obese adults.” [DNL = de novo lipogenesis which means making fat from scratch in the liver.] An accompanying commentary in the same journal states: “In the event that any readers harbor some remaining skepticism, an unprecedented thorough analysis in close to 900,000 participants from almost 60 prospective studies was very recently published, proving beyond any possible doubt that progressive excess mortality is caused by increased body adiposity…Stanhope and colleagues provide major scientific progress by demonstrating marked differences in the metabolic effects of these two major sugars with respect to their ability to promote intraabdominal lipid deposition and hepatic lipid production, while shifting cholesterol metabolism in an unfavorable manner and diminishing insulin sensitivity in humans.” Public health is groaning under a burden of overweight/obesity; how much disease could we prevent just by cutting out most of the sweet drinks (including most fruit juices) for children and adults?
Posts Tagged ‘insulin’
Fructose even worse than glucose for fat and insulin
Tuesday, January 12th, 2010Insulin and cognitive disorders
Wednesday, December 23rd, 2009Insulin receptors are found throughout the central nervous system. Fascinating fact: “insulin affects distinct cognitive processes, e.g. by triggering the formation of psychological memory contents.” As the authors of this paper published recently in the journal Diabetologia state: “metabolic and cognitive disorders such as obesity, type 2 diabetes mellitus and Alzheimer’s disease are associated with resistance of central nervous structures to the effects of insulin…” They go on to conclude: “Enhancement of central nervous insulin signalling…has yielded encouraging results that bode well for the successful translation of these effects into future clinical practice.” Targeted tests are available to determine how you can best take care of your brain by managing blood sugar and insulin.
Sugar shortens life span
Wednesday, November 25th, 2009You are probably aware of earlier studies that demonstrated increase in life span of experimental animals by the effect of caloric restriction on insulin regulating pathways. This interesting study recently published in the journal Cell Metabolism elucidates the flip side: “We found that adding a small amount of glucose to the medium (2%) shortened the life span of C. elegans by inhibiting the activities of life span-extending transcription factors that are also inhibited by insulin signaling…” The authors conclude: “Together, these findings raise the possibility that a low-sugar diet might have beneficial effects on life span in higher organisms.”
Serum insulin, not glucose, linked to prostate cancer
Thursday, November 19th, 2009Here we have another study linking insulin resistance and higher serum insulin to prostate cancer. This recently published article in the Journal of the National Cancer Institute concludes: “Elevated fasting levels of serum insulin (but not glucose) within the normal range appear to be associated with a higher risk of prostate cancer.” Gentlemen, it is important to know that insulin levels rise in the background while glucose appears normal for years before type 2 diabetes is diagnosed. Make sure you know how to keep insulin receptors healthy.
Insulin receptor expression by human prostate cancers
Friday, November 13th, 2009There’s much more to prostate cancer prevention than finasteride. Here is another recent study published in the journal Prostate that documents the presence of insulin receptors on primary human prostate cancers. “The findings are relevant..to the hypothesis that obesity-associated hyperinsulinemia mediates the adverse effect of obesity on prostate cancer prognosis.” Important: Finasteride works by blocking the enzyme that converts testosterone to the more potent metabolite dihydrotestosterone. It, and natural agents that also inhibit the same enzyme, are helpful if dihydrotestosterone is too high—but this is not always the case. Lowering it too much can result in common adverse reactions that include decreased libido, impotence, and decreased ejaculatory volume. The functional approach to prostate disorders always includes lab assessment of the biologically active free fraction testosterone, dihydrotestosterone, estradiol, and the pituitary hormones LH and FSH that stimulate their production.
Insulin & estrogen are risk factors for prostate disease
Monday, November 2nd, 2009Here is a paper in the journal Prostate Cancer and Prostatic Diseases that is more evidence for what I have been telling Lapis Light patients for years: insulin and estrogen are both proliferating hormones that in excess promote prostatic hyperplasia (enlargement). No prostate assessment is complete without evaluating insulin regulation, free fraction steroid hormones (including estrogen in men) and Vitamin D levels.
Cancer risks of insulin therapy
Tuesday, October 20th, 2009Lapis Light patients know that insulin resistance is a risk factor for numerous cancers and that insulin is elevated in metabolic syndrome years before diabetes sets in. This study documents that insulin therapy given in the treatment of type 2 diabetes increases the likelihood of developing a range of solid tumors, highlighting the action of insulin as a proliferating hormone. Obviously this must be taken into consideration in diabetes case management and prevention.
Diabetes Drugs Do Not Reduce Inflammation
Thursday, October 8th, 2009This Harvard study shows evidence that although metformin (a commonly used diabetes medication) and insulin lower blood glucose, they do not reduce key inflammatory biomarkers. With these medications the blood sugar goes down, but the inflammation continues. These inflammatory biomarkers are associated with a host of chronic diseases: cardiovascular, cancer, autoimmune, etc. Moreover, “recent-onset type 2″ diabetics were assessed. The damage starts before the diagnosis.