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Nathan Goodyear

Glucagon-like peptide 1 improves the ability of th... [Diabetes. 1998] - PubMed result - 0 views

  • We concluded that low dosage GLP-1 improves the ability of the beta-cell to secrete insulin in both IGT and NIDDM subjects, but that the ability to sense and respond to subtle changes in plasma glucose is improved in IGT subjects, with only a variable response in NIDDM subjects. Beta-cell dysfunction was improved by GLP-1 infusion, suggesting that early GLP-1 therapy may preserve beta-cell function in subjects with IGT or mild NIDDM.
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    glucagon-like peptide-1 improves insulin/glucose regulation
Nathan Goodyear

Divergence of gut permeability and mucosal immune gene expression in two glut... - 0 views

  • GS as a condition associated with prevalent gluten-induced activation of innate, rather than adaptive, immune responses in the absence of detectable changes in mucosal barrier function.
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    Gluten sensitivity a result of the innate immunity
seth morris

Feeling the Gyrating Beat with Herbal Highs - 1 views

Dancing in club parties is one way of relieving stress contained for many hours while working in the office. My friends and I love to spend an all-night party in order to unwind and forget the dead...

legal highs

started by seth morris on 09 May 11 no follow-up yet
Nathan Goodyear

Effects of supplemental fish oil on resting metabo... [J Int Soc Sports Nutr. 2010] - P... - 0 views

  • These changes were significantly correlated with a reduction in salivary cortisol following FO treatment.
  • 6 wk of supplementation with FO significantly increased lean mass and decreased fat mass
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    saliva cortisol evaluation reflective of decreased fat mass with Omega-3 supplementation
Nathan Goodyear

ScienceDirect - Environmental Research : The effect of long-term low-dose lead exposure... - 0 views

  • his study revealed that long-term low-level lead exposure may lead to reduced FT4 level without significant changes in TSH and T3 levels in adolescents even at low Pb-B levels.
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    low lead level exposure and thyroid dysfunction
Nathan Goodyear

Beneficial effects of a long-term oral L-arginine treatment added to a hypocaloric diet... - 0 views

  • L-arginine supplementation further decreased FM (P < 0.05) and waist circumference (P < 0.0001), preserving FFM (P < 0.03), and improved mean daily glucose profiles (P < 0.0001) and fructosamine (P < 0.03). Moreover, change in area under the curve of cGMP (second messenger of nitric oxide; P < 0.001), superoxide dismutase (index of antioxidant capacity; P < 0.01), and adiponectin levels (P < 0.02) increased, whereas basal endothelin-1 levels (P < 0.01) and leptin-to-adiponectin ratio (P < 0.05) decreased in the L-arginine group.
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    L-Arginine helps to preserve muscle, while increase fat loss.  This will help to prevent fat rebound in weight loss programs.  Additionally, insulin resistance improved.
Nathan Goodyear

Which Patients Do Not Require a GH Stimulation Test for the Diagnosis of Adult GH Defic... - 0 views

  • Four studies have reported that the probability of GHD (peak GH criteria ranging from < 2.3 to < 5 μg/liter) in patients with three to four PHDs ranges from 91% to 100%
  • 95% accuracy by the presence of either three or more PHDs or a serum IGF-I concentration less than 84 μg/lite
  • adult GHD could be predicted with 95% accuracy by the presence of either three or four PHDs or a serum IGF-I concentration less than 84 μg/liter
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  • Hypopituitary adults with GHD have been reported to have normal serum IGF-I levels in 37–70% of patients in various studies (5, 9, 18, 21, 22). This is owing in part to the fact that multiple factors regulate serum IGF-I concentrations including nutritional status; hepatic and renal function; and circulating concentrations of thyroid hormone, androgens, and estrogens
  • changes in concentrations of IGF-binding proteins (IGFBPs) influence the total concentration of IGF-I in plasma
  • Among patients with an IGF-I sd score above −1 in the present study, 46% had a peak GH less than 2.5 μg/liter and 67% had a peak GH less than 5 μg/liter.
  • In summary, adult GHD can be predicted with 95% accuracy by the presence of either three or four PHDs or a serum IGF-I concentration less than 84 μg/liter
  • We propose that adult patients with three or four PHDs (three or four of the following deficiencies: TSH, ACTH, gonadotropins [LH and/or FSH], and AVP [central diabetes insipidus]) do not require a GH stimulation test to make the diagnosis of adult GHD
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    Insulin Tolerance Test is the gold standard for HGH diagnosis, but this an unpopular test do to long list of side effects.  This study finds a 95% accuracy for IGF-1 less than 84 with 3 or more coexisting pituitary hormone deficiencies.
Nathan Goodyear

Urinary estrogen metabolites in women at high risk for breast cancer - 0 views

  • obesity has also been linked to preferential estrogen metabolism via the 16-alpha-hydroxylation pathway; thus, a prediction of the mechanism by which obesity could increase breast cancer risk would be through a lowering of the 2:16 ratio in favor of the 16 pathway
  • increased BMI was associated with a lower 2:16 OHE ratio
  • Our data show a significant association between alcohol use, defined as at least one drink per day or an average of seven per week, and 2:16 OHE ratio
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  • An alcohol-induced rise in estrogens as a consequence of alcohol catabolism in the liver has been reported
  • The only study that looked at the association between alcohol and wine consumption in healthy women did not report a clear association
  • smoking has been reported to increase induction of the 2-hydroxylation metabolic pathway (24). However, the few epidemiological studies conducted on healthy women showed no difference in estrogen metabolites with smoking status (22) or smoking dose (20), in line with our findings.
  • Family history of a first-degree family member with breast cancer confers a 2- to 4-fold risk of developing breast cancer
  • 16% of breast cancers are due to unidentified hereditary factors
  • Estrogen metabolism occurs through enzymes whose activity is determined by the presence of specific genetic polymorphisms, thus can be defined as unique to each individual.
  • the metabolism is also influenced by a number of environmental factors, which change over a lifetime
  • significantly lower 2:16 OHE ratio in women who have known breast cancer risk factors compared with healthy women
  • There was an additional significant association specifically with BMI and alcohol use, which also supports the evidence that these factors affect estrogen metabolism
  • Profiling estrogen metabolites may identify women who are more likely to develop breast cancer within a population of women with known risk factors
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    urinary estrogen metabolites shown to provide insight into breast cancer risk.  This study suggested that a low 2:16 OHE ratio increase breast cancer risk.
Nathan Goodyear

Changes of the human gut microbiome induced by a fer... [Sci Rep. 2014] - PubMed - NCBI - 0 views

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    fermented mild favorably alters gut flora.  
Nathan Goodyear

Intravenous Fluid Use in Athletes - 0 views

  • Treatment of exercise-associated hyponatremia with hypertonic IV infusion to correct plasma sodium levels is also a standard and accepted use of IV fluid infusions
  • athletes who present for medical care with hypernatremia who cannot tolerate oral fluids can benefit from IV fluids
  • Vaporization of sweat accounts for 80% of heat loss in hot, dry atmospheric conditions. This mechanism of water loss is the major contributor for exercise-associated dehydration
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  • The rate of water loss can be quantified through measurement of sweat rate
  • Pre- and postexercise body weight measurements are the most common means to estimate overall water loss but are condition specific
  • It appears that 1% to 2% body weight loss is well tolerated by the exercising athlete
  • Dehydration, defined as greater than 2% loss of body weight, can negatively affect performance
  • In highly trained endurance athletes, plasma volume and sodium serum concentration were preserved despite a 5% body weight loss
  • In Ironman triathletes, dehydration to 5% body weight loss did not correlate with occurrence of medical complications
  • hydration should begin hours prior to exercise, especially if known deficits are present, and fluids should be consumed at a slow, steady rate, with 5 to 7 mL/kg taken 4 hours prior to exercise
  • Sodium concentration did not produce significant changes in the rate of absorption but was primarily dependent on carbohydrate concentration
  • Replacing 150% of body weight loss over 60 minutes has been tolerated without complications
  • IV treatment of severe dehydration (>7% body weight loss), exertional heat illness, nausea, emesis, or diarrhea, and in those who cannot ingest oral fluids for other reasons, is clinically indicated
  • A recent survey of the National Football League teams revealed that 75% (24 of 32) of the teams utilized IV infusion of fluids for prehydration in at least some otherwise healthy individuals
  • In the National Football League, an average of 1.5 L of normal saline was administered approximately 2.5 hours prior to competition
  • after 2 hours of exercise, the rectal temperature was 0.6° higher in the group not receiving IV infusion. Also, stroke volume and cardiac output were 11% to 16% lower in the control group versus the IV infusion group.
  • Recent evidence suggests the etiology of EAMC is related to muscle fatigue and neuronal excitability
  • no correlation between hydration status or electrolyte concentrations with EAMC
  • there may be a subset of muscle cramping that is associated with a loss of both body fluid and sodium
  • Glycerol is the primary agent for oral hyperhydration
  • elevation of plasma volume by 200 to 300 mL via dextran infusion resulted in 15% increase in stroke volume, 4% increase in VO2 max, and an increase in the exercise time to fatigue
  • Neither the tonicity nor mode of hydration resulted in improved speed of rehydration, greater fluid retention, or improved performance
  • There are beneficial anecdotal reports of EAMC treatment in elite and professional-level athletes with IV hydration during the course of an event
  • Plasma volume was better restored during rehydration with IV fluids at preexercise and 5 minutes of exercise. At 15 minutes, there was no difference between IV and oral rehydration
  • More rapid restoration of plasma volume was accomplished in the IV treatment group with no advantages over oral rehydration in physiological strain, heat tolerance, ratings of perceived effort, or thermal sensations
  • No difference was found in exercise time to exhaustion. IV and oral rehydration methods were equally effective. Heart rates were statistically higher in the oral rehydration group through 75 minutes of exercise, and there were higher increases in norepinephrine plasma concentrations
  • No significant differences between the groups were found for time to recovery, number of days with pain, number of days with stiffness, sleep disturbance, fatigue, rectal temperature, and loss of appetite
  • The current data suggest that IV rehydration is faster than oral
  • There may be physiological benefits of decreased heart rate and norepinephrine in athletes rehydrated via IV route
  • Postexercise blood 1 hour and 24 hours showed no differences in circulating myoglobin or creatine kinase
  • The use of IV fluid may be beneficial for a subset of fluid sensitive athletes
  • this should be reserved for high-level athletes with strong histories of symptoms in well-monitored settings.
  • Volume expanders may also be beneficial for some athletes
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    to be read
Nathan Goodyear

Testosterone Deficiency, Cardiac Health, and Older Men - 0 views

  • 2.1 standard deviations in total testosterone was associated with a 25% increase in mortality
  • Erectile dysfunction is an established marker for future cardiovascular risk and the major presenting symptom leading to a diagnosis of low testosterone
  • There is a considerable body of evidence that low testosterone is associated with increased cardiovascular and cancer mortality
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  • There is considerable evidence of modest cardiac and metabolic benefits that are shown to reduce cardiovascular risk plus sexual, mood, and quality of life changes associated with restoring testosterone levels
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    low Testosterone is associated with increased mortality in men and Testosterone therapy in men with low T is associated with a reduction in mortality in men.
Nathan Goodyear

Weight changes, sodium levels, and performance in the South African... - PubMed - NCBI - 0 views

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    Body weight post race was inversely associated with serum sodium i.e.  less weight loss was associated with lower serum sodium.  Body weight loss was unrelated to marathon time.
Nathan Goodyear

ENDOGENOUS SEX HORMONES, BLOOD PRESSURE CHANGE, AND RISK OF HYPERTENSION IN POSTMENOPAU... - 0 views

  • Among postmenopausal women, serum T was elevated in hypertensive participants [9, 11, 12], and total T, free T, and DHEA were positively correlated with SBP
  • T and DHEA were attenuated by adjustment for BMI, reflecting either a confounding or a mediating effect of obesity
  • SHBG concentration was inversely associated with risk of hypertension and longitudinal rise of BP over time
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  • SHBG has been postulated as a marker for insulin resistance
  • In vitro studies showed that insulin inhibits SHBG production from hepatoma cells
  • In intervention studies, successful weight loss and weight maintenance increased SHBG in men with obesity
  • E2 may also induce insulin resistance and thereafter tend to raise BP.
  • strong association between E2 and measures of insulin resistance in postmenopausal women, independent of adiposity
  • In postmenopausal women that received hormone replacement therapy, estrogen therapy increased mononuclear cell secretion of tumor necrosis factor alpha (TNF-α)
  • estrone levels were positively associated with inflammatory markers in postmenopausal women
  • higher baseline concentrations of endogenous E2, total and bioavailable T, and DHEA and lower concentration of SHBG were associated with a higher incidence of hypertension and a greater increase in BP during follow-up
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    Data from MESA study finds that increasing endogenous Estradiol, Total and free Testosterone, DHEA, and lower SHBG were associated with hypertension in postmenopausal women.
Nathan Goodyear

Spectrum of metabolic dysfunction in relationship with hyperandrogenemia in obese adole... - 0 views

  • subjects with hyperandrogenemic phenotypes displayed the greatest degree of hyperinsulinemia, β-cell function, and chronic inflammation
  • The rise in serum androgens is accompanied by excess insulin secretion, suggesting that insulin directly stimulates ovarian androgen production
  • The degree of hyperinsulinemia does not seem to be directly correlated with the development of HS
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  • higher androgen and insulin levels stimulate hair growth
  • genetic and epigenetic changes may be involved in the pathogenesis of PCOS
  • HA has been identified as an important risk factor for MS and dyslipidemias in premenopausal women and adolescents
  • In our study, HA was found to be an independent risk factor for MS as previously reported by Coviello et al.
  • obesity and HA, and not insulin resistance, are the major determinants of chronic inflammation and risk of atherosclerosis in adolescents with PCOS
  • use of an inflammation marker may help identify high-risk females with PCOS
  • hyperandrogenemic PCOS phenotypes have greatest degree of hyperinsulinemia, insulin resistance, and inflammation
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    Elevated androgens are associated increasing insulin, insulin resistance, and inflammation (as measured by CRP).
Nathan Goodyear

Relationship between Low Free Testosterone Levels and Loss of Muscle Mass : Scientific ... - 0 views

  • Our data confirm that a low FT level is a significant predictor of a risk for loss of appendicular muscle
  • Total lean mass is associated with bioavailable T in postmenopausal women
  • Further studies are needed to determine the role of androgens in preserving muscle mass in women
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  • Approximately 1% to 2% of T in the blood exists as FT
  • appendicular muscle loss was significantly associated with low levels of FT
  • These results suggest that a threshold level of FT exists for muscle loss, rather than a dose-response relationship
  • In the previous cross-sectional and longitudinal studies of French and American men, no dose-response relationships were reported between T and muscle mass
  • A minimal serum level of FT may be needed to preserve muscle mass in men, regardless of race/ethnicity.
  • Our result is in line with previous studies that reported a relationship between low FT and low muscle mass in men
  • T stimulates protein synthesis and inhibits protein degradation in muscle cells
  • T also increases satellite cell replication and activation in older men
  • In this study, no significant association between TT levels and muscle loss were observed
  • Although a progressive decrease in TT levels with ageing is observed in middle-aged and elderly American men16, 17, the TT levels do not change during ageing in Japanese men
  • FT levels may be a good marker for the loss of muscle mas
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    study of Japanese men finds that low free Testosterone was a predictor of decrease in muscle mass.
Nathan Goodyear

Unintended effects of statins from observational studies in the general population: sys... - 0 views

  • A markedly increased risk of myopathy was observed
  • One cohort study (Women’s Health Initiative) of higher quality and larger sample size found stronger evidence of an increased risk of self-reported T2DM (OR=1.47; 95% CI 1.32 to 1.64) for the groups of women who reported statin use at baseline and three years later
  • Hippisley-Cox et al. found an increased risk of liver enzyme changes
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  • weak evidence of an increased risk of type 2 diabetes mellitus (T2DM) was observed
  • Smeeth et al. found an increased risk of incident liver disease in the first year after the index date
  • The cumulative incidence of T2DM after three years of statin treatment was 6.25%, corresponding to an excess risk of 2.25%
  • We found no increased risk of peripheral neuropathy, depression, common eye diseases, renal disorders or arthritis associated with taking statins. Studies of higher quality did not show previously reported protective effects of statins on fractures, venous thrombo-embolism or pneumonia
  • There was evidence of an increase in myopathy, raised liver enzymes and diabetes.
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    Statin use associated with increased myopathy, liver dysfunction, and type II Diabetes.  The authors conclude that the absolute risk is very low, yet OR was 1.47 for type II Diabetes (translated 47% increased odds of developing Diabetes as a result of statins) and OR of 2.63 in risk of myopathy (translated 163% increased odds of developing myopathy as a result of statins).  Seems the authors "low risk" statement is just applies to those without symptoms/side effects.  Physicians need to do a better job of understanding risks and customizing therapies.
Nathan Goodyear

Changes in Red Meat Consumption and Subsequent Risk of Type 2 Diabetes: Three Cohorts o... - 0 views

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    red meat consumption associated with increased weight and risk of type 2 Diabetes.  The study didn't look at the source of the red meat.  
Nathan Goodyear

The endurance triathlon: metabolic changes after each event and dur... - PubMed - NCBI - 0 views

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    Serum lactate elevates early in triathlon.  The greatest increase is associated with the swim event.  Muscle damage progressed through the 3 events (creatine phosphokinase and LDH).  Uric acid levels increased.  Recovery was seen out to 6 days post event.
Godwin Daniel

You can live a more healthy life than that - 0 views

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started by Godwin Daniel on 02 Dec 14 no follow-up yet
Nathan Goodyear

Covariation of change in bioavailable testosterone and adiposity in... - PubMed - NCBI - 0 views

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    Bioavailable Testosterone is positively associated with Visceral adipose tissue and to a lesser degree subcutaneous fat in women.  
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