Human Nutrition and Metabolism最新文献

The consequence of appropriate food consumption and the corresponding amount of dietary nutrients on brain function is widely recognized. More and more studies are pointing to the importance of diet for alleviating neurological symptoms associated with a wide range of clinical disorders. The recently discovered implications of nutritional variables on modifications in mitochondrial dysfunction, epigenetic modification, and neurological inflammation represent important factors that play a crucial role in determining the effect of nutrition on Neuronal (health). This overview investigates the present state of evidence regarding the efficacy of various dietary interventions, such as dietary supplements and dietary restrictions, for in the context of managing disorders related to the brain. Particularly, it clearly state the consequences of these interventions on conditions such as Alzheimer's, Parkinson's, ischemic stroke, seizures, injury to the brain, amyotrophic lateral sclerosis (ALL), Huntington's syndrome, and multiple sclerosis (MS). Along with this, it is important to note that a variety of possible processes, such as metabolic regulation, epigenetic alteration, and the inflammation of neurons assume a pivotal function. in determining the impact of nutrition availability on the risk of neurologic conditions and treatment outcomes. Along with this, authors clearly state the innovative concept that dietary supplement intervention can modify interconnected processes of metabolism, epigenetics, and immunology, thereby addressing brain dysfunction. Concentrating on metabolic processes the study of the epigenetic-immunity network has the potential to provide a novel framework for addressing vulnerabilities in the field of neurology.

Glucose is an osmotically active molecule and, therefore, rapid changes in plasma glucose might redistribute water volume between the body fluid compartments in a yet unknown way. To study this issue, population volume kinetic analysis was applied to repeated measurements of plasma glucose, blood hemoglobin, and urine output during and after 84 intravenous infusions of 2.5 % glucose with 70 mmol of sodium and in 9 control experiments using Ringer's solution. Forty-nine infusions were given to healthy volunteers, 11 to patients undergoing surgery, and 24 to patients with type 2 diabetes. The results showed that a rise in plasma glucose without marked glucosuria accelerated the distribution of fluid while the return of extravascular fluid to the plasma was strongly retarded. High plasma glucose also decreased the urine output, which was probably due to sodium retention. The summary effect was that fluid-induced plasma volume expansion subsided within 30 min after an infusion ended while extracellular fluid volume remained increased for several hours. Accumulation of fluid was most pronounced in the patients with type 2 diabetes and in the surgical patients. Plasma glucose, HOMA-IR, and Ouicki values did not correlate with any of the kinetic parameters. In conclusion, a rise in plasma glucose conserved infused fluid in the body and promoted peripheral accumulation. A specific effect of type 2 diabetes further decreased the urine flow.

Background

Vitamin D (vitD) plays a role in iron metabolism by the suppression of hepcidin, while iron deficiency also impairs vitD metabolism. In undernourished children, iron and vitamin D deficiency are common. There is little knowledge of the inter-relationship between these two nutrients in undernourished and non-undernourished children.

Aim

To assess the association between 25-hydroxyvitamin D (25(OH)D) and iron status, and the effect of 3 doses of 50,000 IU of vitD on iron status in undernourished and non-undernourished children.

Methods

We measured serum 25(OH)D, haemoglobin (Hb), ferritin and soluble transferrin receptor in 121 undernourished and 51 non-undernourished children in clinics in the North-West Province of South Africa. Three doses of 50,000 IU/week of vitD was supplemented to children with suboptimal vitD levels.

Results

The overall prevalence of suboptimal vitD concentration (25(OH)D < 30 ng/mL) was 20.3 %. Anaemia and iron deficiency anaemia (IDA) prevalence were 62 % and 49.2 % in the undernourished and 56.9 % and 42.9 % in the non-undernourished group. In the overall group, 25(OH)D < 30 ng/mL was associated with significantly higher IDA prevalence compared to those with 25(OH)D ≥ 30 ng/mL (64.7 % vs 43.0 %, p = 0.023), and was associated with an increased risk of IDA in the crude analysis (OR: 2.434 1.114, 5.318, p = 0.026). Serum 25(OH)D < 30 ng/mL was associated with 4 times (OR: 4.046, 95%CI: 1.022, 16.009, p = 0.046) and greater than 5 times (OR: 5.386, 95%CI: 1.528, 18.985, p = 0.009) increased odds of anaemia and IDA in the undernourished children, respectively. VitD supplementation resulted in a significant reduction of 55.9 % in TNF-α concentration (p = 0.008) in the overall group.

Conclusion

Suboptimal vitD concentration is associated with increased odds of anaemia and IDA. VitD status should be considered in anaemia prevention strategies, especially in populations where both vitD and iron deficiencies co-exist.

This randomized controlled trial evaluated different cooking methods of potatoes as part of the DASH diet on blood pressure (BP) and anthropometrics in people with and without type 2 diabetes (T2D). Participants were randomized into DASH-FP (fried potatoes), DASH-NFP (non-fried potatoes) or DASH-NP (no potatoes) groups. BP, weight, waist circumference and body composition were measured.

Change outcomes from baseline to 6 weeks showed no significant difference in the study outcomes, including diastolic BP (p = 0.12), systolic BP (p = 0.26), body weight (p = 0.11), waist circumference (p = 0.86) and body composition (p = 0.57) within study groups. A significant group T2D status interaction was found for waist circumference (p = 0.036). Results from pairwise comparisons between the groups for all outcomes were not significant; however, a positive trend was seen in DASH-NFP and DASH-FP diet groups in BP and anthropometrics.

Individuals with and without T2D that consumed potatoes and the DASH diet did not significantly change BP and anthropometrics by six weeks. Slight improvements in BP and anthropometrics were seen in non-fried and fried potato groups. This helps future investigations of popular foods for people with chronic conditions that can be incorporated in a healthy eating pattern.

Clinical Trials.gov ID: NCT05589467; 9/16/2022.

Watermelon is a well-liked fruit containing bioactive compounds and nutrients. Watermelon research on metabolic diseases often involves flesh, yet rind is less explored. This study examined effects of watermelon with rind on satiety, postprandial glucose, and bowel movement with a sensory evaluation in healthy adults. The study included 21 participants (age 23.6 ± 5.7y, BMI 22.6 ± 2.8 kg/m²) in a randomized double-blind crossover design. Participants consumed one cup of blenderized watermelon with and without rind separated by a one-week washout period. Sensory analysis included 23 semi-trained panelists to complete a triangle and a 7-point hedonic scale test. Results revealed significant increase in satiety for both trials over time, with more fullness for watermelon with rind (P < 0.05). Rind stabilized glucose response compared to flesh (P < 0.001). No bowel movement differences were found for either trial. Most sensory panelists (91 %) identified the sample of watermelon with rind in the triangle test (P < 0.001). Higher ratings in color, consistency, smell, flavor, and sweetness for watermelon compared to watermelon with rind (P < 0.01). Overall acceptance was significantly higher for watermelon compared to watermelon with rind (P < 0.001). Findings suggest health-promoting effects of watermelon rind on satiety and glucose, but higher acceptance for watermelon flesh vs watermelon flesh with rind. Future studies should investigate potential benefits of rind in disease prevention and attenuation. Advancement in food technologies is also needed to increase palatability to promote rind consumption.

Background

The present study aimed to explore the association of vitamin D with triglyceride-glucose (TyG) index and cardiometabolic risk factors in subclinical hypothyroidism (SCH).

Methods

We recruited 75 individuals diagnosed with SCH and 75 healthy controls of both genders aged 20 to 65 years. Triiodothyronine (T₃), thyroxine (T₄), thyroid stimulating hormone (TSH) and 25-hydroxyvitamin D [25(OH)D] were measured using chemiluminescent immunoassay. Fasting plasma glucose and lipid profile were analyzed by standard methods. The TyG index was calculated as Ln [fasting triglycerides (mg/dL) × fasting glucose (mg/dL)]/2.

Results

There were significant decreases in 25(OH)D levels and changes in cardiometabolic risk factors among individuals with SCH compared to healthy controls. Additionally, there was a significant increase in the TyG index among the SCH group. Correlation and regression analysis revealed that 25(OH)D was significantly and negatively associated with TyG index, diastolic blood pressure (DBP), total cholesterol (TC), triglyceride (TG), low-density lipoprotein cholesterol (LDL-C) and very low-density lipoprotein cholesterol (VLDL-C). However, it was positively associated with high-density lipoprotein cholesterol (HDL-C).

Conclusion

Present study shows that SCH patients have lower vitamin D levels and higher TyG index, increasing cardiovascular disease risk. Screening and managing vitamin D deficiency is crucial in these subjects. In addition, TyG index could be used as an indicator for identifying vitamin D deficiency.

Purpose

The current study sought to assess the synergistic effects of an eight-week nutrition education program (NEP) and controlled dietary modification (CDM) on the nutrition knowledge (NK), nutrition practice (NP), and daily dietary intake of nutrition counselling group (NCG) versus ad-libitum group (ALG), as well as to identify the dietary factors predicting athletes' NP.

Methods

A total of 105 male players (14–18 years) from the sports disciplines-football, hockey, swimming, and athletics-were block randomized into the NCG and the ALG. The NCG underwent an 8-week nutritional intervention (NI) that included NEP and CDM, while ALG did not participate in the NI and followed ad-libitum dietary intake. Primary data on each subject's NK, NP, daily food intake, and anthropometric measurements were collected before and after the intervention period for paired and case-control analysis.

Results

A strong association has been depicted between players’ NK and NP. Daily intake of carbohydrate, protein, calcium, and dietary fibre could be referred to as the significant positive predictors of NP, while fat intake is the negative predictor. The synergistic implementation of NEP and CDM reduced the energy deficits among the NCGby significantly increasing their daily calorie intake to an average of 97%. Protein intake was significantly increased, thus meeting 88% of the recommendation, while the increase in carbohydrate intake was insignificant, meeting 89% of the standards post-NI. Further, the NCG showed significant increases in intake of minerals like calcium, phosphorus, iron, zinc, and selenium, while the ALG had substantial reductions. The former also exhibited significant rises in vitamin A, B9, B12, C, and E intakes. The most significant spikes in macro and micronutrient intake were observed in the footballers and hockey players, who were also the groups with the largest increases in NK and NP scores.

Conclusion

The equilibrium in macronutrient bifurcations and relative macronutrient and micronutrient intake post-intervention indicates the effectiveness of nutritional enactment through an 8-week controlled dietary modification and systematic nutrition education programme on the nutritional status of young athletes. Therefore, good nutrition knowledge may improve the dietary patterns and nutrition intake of athletes. Intervention studies should emphasize nutrition education, aiming for improved athletic performance.

Intermittent fasting (IF) has garnered attention for its potential to promote health and combat chronic diseases. This study focused on the effects of Ramadan fasting, a form of IF observed by Muslims, on renal and liver function markers, anthropometric measurements, and dietary intake in healthy overweight and obese men. The study involved 60 participants from Hargeisa, Somaliland, with an average age of 40.01 ± 7.99 years. Results revealed significant reductions in body weight (P ≤ 0.001), waist circumference (P ≤ 0.001), and body mass index (P ≤ 0.001) after Ramadan fasting. Urea levels decreased significantly (P = 0.003), and though creatinine levels showed a non-significant decrease, uric acid levels increased significantly within the normal range (P ≤ 0.001). Serum glutamate oxaloacetate transaminase (GOT) levels decreased significantly (P ≤ 0.001), while glutamate pyruvate transaminase (GPT) and alkaline phosphatase (ALP) levels remained stable. Dietary analysis indicated a significant decrease in total carbohydrates (P = 0.023), proteins (P = 0.006), and dietary cholesterol intake (P ≤ 0.001). These findings suggest that Ramadan fasting positively impacts anthropometric and renal-liver function markers in healthy overweight and obese men. The study contributes to the expanding understanding of intermittent fasting's potential health benefits, emphasizing the importance of considering Ramadan fasting as a preventive approach for metabolic disorders. Further research should explore long-term effects, mechanistic insights, and personalized clinical applications, while public health initiatives could educate individuals about safe and informed fasting practices.

The aim of the study was to evaluate the effectiveness of a school-based intervention programme among overweight and obese adolescents in Seremban, Negeri Sembilan, Malaysia. A cluster randomised controlled trial was conducted to evaluate the effect of the intervention (n = 200) and compared with control group (n = 200). The intervention was developed based on social cognitive theory, conducted in a group based, five-session of face-to-face, bi-weekly for 10 weeks. The primary outcomes were body mass index (BMI) and BMI-for-age z-scores (BAZ), whereas the secondary outcomes were breakfast consumption, physical activity level, self-efficacy, and body satisfaction. T-tests and generalized linear mixed model analysis were used to examine the effectiveness of the intervention at baseline, immediate post-intervention, and 3-month post-intervention, while controlling for covariates. A significant intervention effect was found in reducing BMI and BAZ. BMI of the participants in the intervention group was reduced from 28.10 kg/m² to 27.93 kg/m², and further decreased to 27.80 kg/m², while BAZ was reduced from 2.19 to 2.12, and further decreased to 2.07, from baseline to immediate post-intervention, and 3-month follow-up, respectively. Furthermore, there was significant improvement in breakfast consumption frequency, physical activity scores, healthy eating and weight self-efficacy scores, perceived physical activity self-efficacy scores, and body discrepancy scores as compared with the control group. The integrated school-based intervention programme was effective in reducing BMI and BAZ among overweight and obese participants. The results suggested that this programme could be integrated as one of the regular school co-curricular programmes.

Background

In Sub-Saharan African countries, data examining postmenopausal women's cardiometabolic risk (CMR) remains limited. Our study aimed to assess the visceral adiposity index (VAI) and lipid accumulation product (LAP), atherogenic index of plasma (AIP), and physical activity levels of postmenopausal women and determine their CMR.

Methods

A cross-sectional study included 224 postmenopausal women aged ≥47 years recruited from Khartoum State, Sudan. Weight, height, waist and hip circumferences were measured. Physical activity levels were determined using the Global Physical Activity Questionnaire version 2. Fasting blood samples (5 mL) were collected to determine the lipid profile. The VAI and LAP were calculated as indicators for visceral adiposity, whereas AIP was calculated as an indicator of CVD risk.

Results

The postmenopausal women's mean age was 62.4 ± 10.2 years. Women (29.2%; 54/185) were physically inactive, with most inactive women being >64 years and having ≥5 CVD risk factors compared with the active and very active women with 3–4 CVD risk factors. Women had high total cholesterol (24.6%), triglycerides (26.6%), low-density lipoprotein cholesterol (14.3%), and low high-density lipoprotein cholesterol (61.2%) levels. Moreover, women (33.5%) had a high CVD risk. In multiple regression analyses, AIP increased significantly with VAI and BMI. The ROC analysis revealed that the highest and statistically significant AUC was recorded for VAI followed by LAP among postmenopausal women, suggesting their diagnostic significance for CVD risk.

Conclusion

VAI and LAP were closely associated with an increased risk of CVD in postmenopausal Sudanese women and were considered the best diagnostic performance.