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Nutrients Jun 2024Polycystic ovary syndrome (PCOS) is a common endocrine disorder that affects women of reproductive age. Many women with PCOS have been found to have an unbalanced diet...
Polycystic ovary syndrome (PCOS) is a common endocrine disorder that affects women of reproductive age. Many women with PCOS have been found to have an unbalanced diet and deficiencies in essential nutrients. This study aimed to assess the levels of folate and vitamin B12 (B12) and their relationship with metabolic factors in women with PCOS. Anthropometric, clinical, and genetic analyses were conducted to evaluate markers related to one-carbon metabolism in women with PCOS and in a control group. The PCOS group had a higher BMI and HOMA-IR (1.7 vs. 3.1; < 0.0001). HDL cholesterol levels were 23% lower and triglyceride levels were 74% higher in women with PCOS. Although there were no significant differences in folate and B12 levels between the PCOS and control groups, over 60% of women with PCOS had low B12 levels (<300 pg/mL) and high homocysteine levels. In addition, the MTHFR A1298C and C677T polymorphisms were not associated with PCOS. Moreover, erythrocyte folate levels were positively correlated with fasting glucose, triglycerides, and free androgen index, and negatively correlated with SHBG and LH levels. These results suggest that B vitamins may be associated with the metabolic phenotype in PCOS. This study emphasizes the potential link between folate, vitamin B12, and metabolic and hormonal outcomes in women with PCOS.
Topics: Humans; Female; Polycystic Ovary Syndrome; Vitamin B 12; Folic Acid; Adult; Chile; Young Adult; Triglycerides; Homocysteine; Body Mass Index; Blood Glucose; Methylenetetrahydrofolate Reductase (NADPH2); Insulin Resistance; Cholesterol, HDL; Case-Control Studies; Biomarkers
PubMed: 38931291
DOI: 10.3390/nu16121937 -
Nutrients Jun 2024The relationship between vitamin A supplementation and myopia has been a topic of debate, with conflicting and inconclusive findings. We aimed to determine whether there... (Meta-Analysis)
Meta-Analysis
The relationship between vitamin A supplementation and myopia has been a topic of debate, with conflicting and inconclusive findings. We aimed to determine whether there is a causal relationship between vitamin A supplementation and the risk of myopia using Mendelian randomization (MR) and meta-analytical methods. Genetic variants from the UK Biobank and FinnGen studies associated with the response to vitamin A supplementation were employed as instrumental variables to evaluate the causal relationship between vitamin A supplementation and myopia. Fixed-effects meta-analysis was then used to combine MR estimates from multiple sources for each outcome. The meta-analysis of MR results found no convincing evidence to support a direct causal relationship between vitamin A supplementation and myopia risk (odds ratio (OR) = 0.99, 95% confidence interval (CI) = 0.82-1.20, = 0%, = 0.40). The analysis of three out of the four sets of MR analyses indicated no direction of causal effect, whereas the other set of results suggested that higher vitamin A supplementation was associated with a lower risk of myopia (OR = 0.002, 95% CI 1.17 × 10-3.099, = 0.096). This comprehensive MR study and meta-analysis did not find valid evidence of a direct association between vitamin A supplementation and myopia. Vitamin A supplementation may not have an independent effect on myopia, but intraocular processes associated with vitamin A may indirectly contribute to its development.
Topics: Humans; Myopia; Mendelian Randomization Analysis; Vitamin A; Dietary Supplements; Polymorphism, Single Nucleotide; Risk Factors; Odds Ratio
PubMed: 38931287
DOI: 10.3390/nu16121933 -
Nutrients Jun 2024Postnatal depression is a common and severe complication of childbirth. It is an important public health problem with significant implications for both mothers and... (Review)
Review
Postnatal depression is a common and severe complication of childbirth. It is an important public health problem with significant implications for both mothers and children. The exact mechanisms underlying and the factors influencing the occurrence of postnatal depression remain unclear. The literature suggests that certain dietary deficiencies during pregnancy and the postnatal period may contribute to a greater risk of maternal depression. This review focuses on the role of selenium in postnatal depression. It collects evidence from published interventional and observational studies investigating the relationship between selenium intake during the antenatal and postnatal periods and the mental status of postpartum women and summarises information about biological mechanisms that may underlie the association between selenium status and postnatal depression. The review includes studies identified through electronic searches of Medline (via PubMed) and Google Scholar databases until December 2023. Despite the small number of relevant studies and their potential methodological limitations, the findings suggest that optimizing selenium status may support the prevention and treatment of postnatal depression. Further longitudinal and interventional studies are necessary to confirm the clinical significance of these effects.
Topics: Humans; Selenium; Depression, Postpartum; Female; Pregnancy; Nutritional Status; Postpartum Period; Dietary Supplements; Maternal Nutritional Physiological Phenomena; Adult
PubMed: 38931280
DOI: 10.3390/nu16121926 -
Nutrients Jun 2024This study investigated the association of preoperative 25-hydroxy (25 (OH)) vitamin D levels with postoperative complications in osteoporotic hip fracture patients... (Observational Study)
Observational Study
This study investigated the association of preoperative 25-hydroxy (25 (OH)) vitamin D levels with postoperative complications in osteoporotic hip fracture patients following surgery. We hypothesized that patients with low concentrations of 25 (OH) vitamin D might have an increased risk of developing adverse outcomes. Between January 2019 and December 2020, a retrospective observational study was conducted, including low-energy fragility fractures at the proximal femur. Regarding preoperative 25 (OH) vitamin D levels, patients were divided into two groups (<30 ng/mL and ≥30 ng/mL). Early and late postoperative complications were assessed and graded according to the Clavien-Dindo classification system. Logistic regression analysis was performed to demonstrate the association between preoperative 25 (OH) vitamin D levels (<30 ng/mL, ≥30 ng/mL) and postoperative complications after adjusting for age and sex. Of 314 patients, 222 patients (70.7%) had a 25 (OH) vitamin D level of <30 ng/mL. The mean serum 25 (OH) vitamin D level was 22.6 ng/mL (SD 13.2). In 116 patients (36.9%), postoperative complications were observed, with the most occurring in the short term (95 patients, 30.2%). Late postoperative complications were present in 21 patients (6.7%), most graded as Clavien I (57.1%). Logistic regression analysis identified a low vitamin D level (<30 ng/mL) as an independent risk factor for early postoperative complications (OR 2.06, 95% CI 1.14-3.73, = 0.016), while no significant correlation was found in late complications (OR 1.08, 95% CI 0.40-2.95, = 0.879). In conclusion, preoperative 25 (OH) vitamin D serum level might be an independent predictor for early postoperative complications. However, future studies are warranted to determine risk factors for long-term complications and establish appropriate intervention strategies.
Topics: Humans; Female; Male; Postoperative Complications; Vitamin D; Aged; Retrospective Studies; Hip Fractures; Osteoporotic Fractures; Aged, 80 and over; Vitamin D Deficiency; Risk Factors; Middle Aged
PubMed: 38931272
DOI: 10.3390/nu16121917 -
Nutrients Jun 2024Premenstrual Syndrome (PMS) is a disorder between gynecology and psychiatry which includes cognitive, affective, and somatic symptoms from mild to severe. The most... (Review)
Review
Premenstrual Syndrome (PMS) is a disorder between gynecology and psychiatry which includes cognitive, affective, and somatic symptoms from mild to severe. The most severe form of PMS is premenstrual dysphoric disorder (PMDD) and it is considered a form of depressive disorder. An association between diet composition and the occurrence of PMS and its severity have been suggested. As such, this manuscript discusses the relationships between diet composition, dietary patterns and eating behaviors, and PMS. PubMed, Embase, Cochrane, and Web of Science databases were searched for related studies up to 18 January 2024. A text search with the following keywords singly or in combination was conducted: "Premenstrual syndrome", "Nutrition", "Diet composition", "Dietary patterns", and "Eating behaviors". Studies published so far showed that low intake of simple carbohydrates, fats, salt, and alcohol, and high of fresh, unprocessed foods rich in B vitamins, vitamin D, zinc, calcium, and omega-3 fatty acids may help prevent the onset of PMS and reduce the severity of its symptoms. However, further studies are needed to formulate definitive recommendations for the use of vitamins, micronutrients and other dietary ingredients supplementation in women with PMS to improve functioning, overall well-being, and physical health. Large, randomized, double-blind clinical trials across diverse populations are necessary to formulate clear recommendations for supplementation in women with PMS.
Topics: Humans; Premenstrual Syndrome; Female; Diet; Feeding Behavior; Adult; Nutritional Status; Dietary Patterns
PubMed: 38931266
DOI: 10.3390/nu16121911 -
Nutrients Jun 2024Collagen dietary supplements are becoming increasingly popular as a means to reduce signs of skin ageing. The objective of this three-way, randomised,... (Randomized Controlled Trial)
Randomized Controlled Trial
The Effects of Dietary Supplementation with Collagen and Vitamin C and Their Combination with Hyaluronic Acid on Skin Density, Texture and Other Parameters: A Randomised, Double-Blind, Placebo-Controlled Trial.
Collagen dietary supplements are becoming increasingly popular as a means to reduce signs of skin ageing. The objective of this three-way, randomised, placebo-controlled, double-blind study was to examine and contrast the effects of dietary supplementation with a daily dose of 5 g hydrolysed collagen with 80 mg of vitamin C (CP product) and their combination with 30 mg of hyaluronic acid (CPHA product) over 16 weeks. Validated methods were utilised for the objective evaluation of skin parameters. In total, 87 subjects (women, 40-65 years) completed the entire trial, distributed across the groups as follows: placebo group ( = 29), CPHA group ( = 28), and CP group ( = 30). The results showed beneficial effects of both test products, with notable enhancements in dermis density, skin texture, and a reduction in the severity of wrinkles. In contrast, the administration of either of the products did not yield any significant impacts on skin elasticity or hydration. Observation of the investigated skin parameters did not show superior effects of the addition of hyaluronic acid (HA) to collagen. Therefore, the ability of supplementation with HA to improve the effects on investigated skin parameters beyond the supplementation of collagen alone cannot be confirmed.
Topics: Humans; Hyaluronic Acid; Ascorbic Acid; Middle Aged; Double-Blind Method; Female; Dietary Supplements; Collagen; Skin Aging; Adult; Aged; Skin; Male
PubMed: 38931263
DOI: 10.3390/nu16121908 -
Nutrients Jun 2024American football players consume large quantities of animal-sourced protein in adherence with traditional recommendations to maximize muscle development and athletic...
Protein Requirements for Maximal Muscle Mass and Athletic Performance Are Achieved with Completely Plant-Based Diets Scaled to Meet Energy Needs: A Modeling Study in Professional American Football Players.
American football players consume large quantities of animal-sourced protein in adherence with traditional recommendations to maximize muscle development and athletic performance. This contrasts with dietary guidelines, which recommend reducing meat intake and increasing consumption of plant-based foods to promote health and reduce the risk of chronic disease. The capacity of completely plant-based diets to meet the nutritional needs of American football players has not been studied. This modeling study scaled dietary data from a large cohort following completely plant-based diets to meet the energy requirements of professional American football players to determine whether protein, leucine, and micronutrient needs for physical performance and health were met. The Cunningham equation was used to estimate calorie requirements. Nutrient intakes from the Adventist Health Study 2 were then scaled to this calorie level. Protein values ranged from 1.6-2.2 g/kg/day and leucine values ranged from 3.8-4.1 g/meal at each of four daily meals, therefore meeting and exceeding levels theorized to maximize muscle mass, muscle strength, and muscle protein synthesis, respectively. Plant-based diets scaled to meet the energy needs of professional American football players satisfied protein, leucine, and micronutrient requirements for muscle development and athletic performance. These findings suggest that completely plant-based diets could bridge the gap between dietary recommendations for chronic disease prevention and athletic performance in American football players.
Topics: Humans; Football; Dietary Proteins; Athletic Performance; Male; Muscle, Skeletal; Energy Intake; Nutritional Requirements; Adult; Diet, Vegetarian; Leucine; Muscle Strength; United States; Athletes; Sports Nutritional Physiological Phenomena; Micronutrients; Young Adult; Diet, Plant-Based
PubMed: 38931258
DOI: 10.3390/nu16121903 -
Nutrients Jun 2024Depression is a major global health concern expected to worsen by 2030. In 2019, 28 million individuals were affected by depressive disorders. Dietary and supplemental... (Review)
Review
Depression is a major global health concern expected to worsen by 2030. In 2019, 28 million individuals were affected by depressive disorders. Dietary and supplemental vitamins show overall favorable preventative and therapeutic effects on depression. B vitamins are crucial for neurological function and mood regulation. Deficiencies in these vitamins are linked to depression. Studies on individual B vitamins show promise in improving depressive symptoms, particularly thiamin, riboflavin, niacin, and folate. Vitamin C deficiency may heighten depressive symptoms, but its exact role is not fully understood. Seasonal Affective Disorder (SAD) is associated with insufficient sunlight exposure and vitamin D deficiency. Vitamin D supplementation for SAD shows inconsistent results due to methodological variations. Further investigation is needed to understand the mechanisms of vitamins in depression treatment. Moreover, more research on SAD and light therapy's efficacy and underlying mechanisms involving photoreceptors, enzymes, and immune markers is needed. Although dietary and supplemental vitamins show overall favorable preventative and therapeutic effects on depression, dietitians treating psychiatric disorders face challenges due to diverse study designs, making direct comparisons difficult. Therefore, this article reviews the current literature to assess the role of dietary and supplemental vitamins in the prevention and treatment of depression. This review found that, although evidence supports the role of B vitamins and vitamins C and D in preventing and treating depression, further research is needed to clarify their mechanisms of action and determine the most effective intervention strategies.
Topics: Humans; Seasonal Affective Disorder; Vitamin D; Dietary Supplements; Vitamins; Depression; Adult; Ascorbic Acid; Vitamin B Complex; Vitamin D Deficiency; Female; Solubility
PubMed: 38931257
DOI: 10.3390/nu16121902 -
Nutrients Jun 2024Type 2 diabetes (T2D) is a global and complex public health challenge, and dietary management is acknowledged as critical in its prevention. Recent studies have...
BACKGROUND AND AIMS
Type 2 diabetes (T2D) is a global and complex public health challenge, and dietary management is acknowledged as critical in its prevention. Recent studies have highlighted the involvement of micronutrients in T2D pathophysiology; our study aims to assess the association between B vitamin intake and T2D risks and the mediating role of inflammation.
METHODS
In a prospective cohort design, data on B vitamins intake, including thiamine (B1), riboflavin (B2), niacin (B3), pyridoxine (B6), folate (B9), and cobalamin (B12), was obtained using a validated food frequency questionnaire (FFQ), and blood inflammatory biomarkers were analyzed according to standard protocol in the local hospitals at baseline from 44,960 adults in the Shanghai Suburban Adult Cohort and Biobank (SSACB). Incident T2D cases were identified according to a physician's diagnosis or medication records from the electronic medical information system. We employed logistic and weighted quantile sum regression models to explore the associations of single and combined levels of B vitamins with T2D and mediation analyses to investigate the effects of inflammation.
RESULTS
Negative correlations between B vitamins and T2D were observed in the single-exposure models, except for B3. The analyses of joint exposure (B1, B2, B6, B9, and B12) also showed an inverse association (OR 0.80, 95% CI 0.71 to 0.88), with vitamin B6 accounting for 45.58% of the effects. Further mediation analysis indicated a mediating inflammatory impact, accounting for 6.72% of the relationship.
CONCLUSIONS
Dietary intake of B vitamins (B1, B2, B6, B9, B12) was associated with a reduced T2D risk partially mediated by inflammation in Shanghai residents.
Topics: Humans; Diabetes Mellitus, Type 2; China; Female; Middle Aged; Male; Inflammation; Prospective Studies; Vitamin B Complex; Adult; Risk Factors; Biomarkers; Aged; Diet; Cohort Studies
PubMed: 38931256
DOI: 10.3390/nu16121901 -
Nutrients Jun 2024Testing and evaluating athletes is necessary and should include performance, body composition, and nutrition. The purpose of this study was to report assessments of...
BACKGROUND
Testing and evaluating athletes is necessary and should include performance, body composition, and nutrition. The purpose of this study was to report assessments of dietary intake, V˙O, and body composition in D1 collegiate athletes and examine relationships between these assessments.
METHODS
Dietary intake was assessed with 3-day recalls and compared to recommendations, and body composition was assessed via bioelectrical impedance analysis (BIA) ( = 48). V˙O was evaluated using a graded exercise test (GXT) with a verification bout ( = 35). Reliability between "true" V˙O and verification was determined. Correlations and regressions were performed.
RESULTS
Energy, carbohydrate, and micronutrient intake was lower than recommendations. Mean V˙O was 47.3 and 47.4 mL·kg·min for GXT and verification, respectively. While correlations were apparent among dietary intake, V˙O, and body composition, percent fat-free mass (%FFM) predicted 36% of V˙O.
CONCLUSIONS
Collegiate athletes are not meeting energy and carbohydrate recommendations and exceed fat recommendations. Vitamin D and magnesium were low in all sports, and iron and calcium were low in females. V˙O ranged from 35.6 to 63.0 mL·kg·min, with females below average and males meeting typical values for their designated sport. Assessing D1 athletes can provide guidance for sports dietitians, coaches, and strength and conditioning specialists to track and monitor nutrition in athletes.
Topics: Humans; Female; Male; Body Composition; Athletes; Young Adult; Nutritional Status; Athletic Performance; Energy Intake; Oxygen Consumption; Universities; Adolescent; Electric Impedance; Dietary Carbohydrates; Nutrition Assessment; Exercise Test; Diet; Sports Nutritional Physiological Phenomena
PubMed: 38931251
DOI: 10.3390/nu16121896