Vitamin B6 and Exercise

1994 ◽  
Vol 4 (2) ◽  
pp. 89-103 ◽  
Author(s):  
Melinda M. Manore
Keyword(s):  
Growth Hormone ◽  
Vitamin B6 ◽  
Low Energy ◽  
Dietary Vitamin ◽  
Dietary Intakes ◽  
Plasma Growth Hormone ◽  
Male Athletes

This paper presents an overview of vitaminand exercise, including the role that vitaminplays in gluconeogenesis and glycogenolysis and changes in vitaminmetabolism during exercise. The dietary vitaminintakes of athletes are also reviewed. Most studies report that male athletes have adequate dietary intakes of vitamin, whereas some females, especially those with low energy intakes, appear to have low vitaminintakes. Few studies have assessed the vitaminstatus of nonsupplementing athletes using the recommended status criteria. The role that vitaminmay play in attenuating the rise in plasma growth hormone observed during exercise is also reviewed. Finally, recomrnendations are given for further research in the area of vitaminand exercise.

scholarly journals Vitamin B6 Status among Vegetarians: Findings from a Population-Based Survey

Nutrients ◽  
2021 ◽  
Vol 13 (5) ◽  
pp. 1627
Author(s):  
Paula Schorgg ◽  
Till Bärnighausen ◽  
Sabine Rohrmann ◽  
Aedin Cassidy ◽  
Nena Karavasiloglou ◽  
...  
Keyword(s):  
Vitamin B6 ◽  
High Performance ◽  
Geometric Mean ◽  
Population Based ◽  
Vegetarian Diet ◽  
Dietary Vitamin ◽  
Dietary Intakes ◽  
Linear Regression Models ◽  
Vitamin B6 Deficiency ◽  
Objectively Measured

Vitamin B6 from plant foods may have lower bioavailability than vitamin B6 from animal foods, but studies on objectively measured vitamin B6 status among vegetarians compared to non-vegetarians are lacking. Thus, the vitamin B6 status among vegetarians, but also pescatarians, and flexitarians, compared to meat-eaters was assessed in the population-based NHANES study (cycles 2007–2008 and 2009–2010). Data on serum pyridoxal-5′-phosphate (PLP) and 4-pyridoxic acid (4-PA) measured by high-performance liquid chromatography (HPLC) as well as dietary intakes from 24-h recalls were available for 8968 adults aged 20–80 years. Geometric mean (±standard error) PLP concentrations were 58.2 ± 6.0, 52.1 ± 3.7, 49.2 ± 4.6 and 51.0 ± 1.1 nmol/L among vegetarians, pescatarians, flexitarians, and meat-eaters. The 4-PA concentrations were 32.7 ± 4.0, 29.0 ± 2.5, 34.8 ± 5.6 and 33.0 ± 0.7, respectively. There were no statistically significant differences in PLP, 4-PA, and their ratio across the groups in multivariable linear regression models. Overall, the use of vitamin B6 supplements was the strongest predictor of the vitamin B6 status, followed by the dietary vitamin B6 intake. Interestingly, several other covariates were significantly associated with vitamin B6 biomarker levels, particularly serum albumin, creatinine and alkaline phosphatase, and should be considered when assessing the vitamin B6 status. In summary, our findings suggest that a vegetarian diet does not pose a risk for vitamin B6 deficiency.

Associations of dietary B vitamins intakes with depression in adults

2021 ◽  
Author(s):  
Yanjun Wu ◽  
Suyun Li ◽  
Weijing Wang ◽  
Dongfeng Zhang
Keyword(s):  
Vitamin B12 ◽  
Vitamin B6 ◽  
Vitamin B1 ◽  
B Vitamins ◽  
Dietary Vitamin ◽  
Dietary Intakes ◽  
Vitamin B2 ◽  
Logistic Regression Models ◽  
The People ◽  
The Impact

Abstract. Background: The impact of the dietary B vitamins intakes on the development of depression has been scarcely investigated. Thus, this study aimed to examine the associations of dietary B vitamins intakes with the risk of depression in American adults. Methods: The data we used in this study were from the National Health and Nutrition Examination Survey (NHANES) 2007-2014. We used the Logistic regression models to analyze the associations of the dietary intakes of B vitamins with the risk of depression. Results: 17,732 individuals (8,623 males and 9,109 females) were enrolled in the study and they were all 18 or older. Compared to the lowest quartile of dietary intake, the ORs (95%CIs) of the highest quartile were 0.64 (0.50–0.82), 0.78 (0.62–0.97), 0.60 (0.47–0.78), 0.65 (0.50–0.84), and 0.71 (0.54–0.95) for vitamin B1, vitamin B2, niacin, vitamin B6, and vitamin B12, respectively. Compared to the people whose dietary intakes below the RDA in the model 2, those with intake meeting the RDA of vitamin B1 (OR: 0.68; 95%CI: 0.56–0.84), niacin (OR: 0.65; 95%CI: 0.51–0.81), B6 (OR: 0.65; 95%CI: 0.52–0.81), or B12 (OR: 0.65; 95%CI: 0.48–0.88) had a lower risk of depression, severally. We also found a nonlinear negative association between dietary vitamin B1, vitamin B2, niacin, vitamin B6, and vitamin B12 intakes and the risk of depression in the dose-response analyses, severally. Conclusions: Our results suggested that dietary vitamin B1, vitamin B2, niacin, vitamin B6, and vitamin B12 intakes may be inversely associated with the risk of depression.

Single and repeated testing of growth hormone secretory capacity in hypopituitarism using growth hormone releasing factor

1986 ◽  
Vol 113 (4_Suppl) ◽  
pp. S118-S122 ◽  
Author(s):  
O. BUTENANDT ◽  
M. EMMLINGER ◽  
H. DOERR
Keyword(s):  
Growth Hormone ◽  
Body Weight ◽  
Pituitary Gland ◽  
Bolus Injection ◽  
Hormone Deficiency ◽  
Test Results ◽  
Repeated Testing ◽  
Plasma Growth Hormone ◽  
Once Daily ◽  
Secretory Capacity

Abstract 38 patients with proven growth hormone deficiency (GHD) and 19 children with familial short stature received an iv GRF-bolus injection of 1 ug/kg body weight. Whereas in all control children plasma growth hormone rose significantly (mean of maximal values 36 ng/ml), only 7 out of 38 patients with GHD reached peak values of 8 ng/ml or more. GRF-priming by 1 ug GRF/kg BW given once daily s.c. for 5 days in 19 patients improved the response of the pituitary gland in 11. Thus, following the first GRF test, only 21 % of patients demonstrated function of the pituitary gland whereas 45 % did so when all test results are combined. To evaluate the pituitary function in patients with GHD correctly, GRF tests following a GRF priming period seems to be necessary to reactivate atrophic somatotropic cells of the pituitary gland.

scholarly journals Depression and Vegetarians: Association between Dietary Vitamin B6, B12 and Folate Intake and Global and Subcortical Brain Volumes

Nutrients ◽  
2021 ◽  
Vol 13 (6) ◽  
pp. 1790
Author(s):  
Samuel Berkins ◽  
Helgi Birgir Schiöth ◽  
Gull Rukh
Keyword(s):  
Vitamin B12 ◽  
Brain Structure ◽  
Vitamin B6 ◽  
Significant Interaction ◽  
Longitudinal Design ◽  
Folate Intake ◽  
Dietary Vitamin ◽  
Brain Volumes ◽  
Subcortical Brain ◽  
Depression Status

Deficiency of vitamin B6 and vitamin B12, mostly in vegetarians, is found to be associated with depression and adverse neurological function. We investigated whether vitamin B6, B12, and folate have an effect on brain structure, especially among depressed people who follow a specific diet. The study sample comprised 9426 participants from the UK Biobank cohort with a mean age of 62.4 years. A generalized linear model controlling for age, sex, body mass index, ethnicity, town send deprivation index, educational qualification, smoking, and alcohol intake was used to test the association between study groups and structural brain volumes. Depression was more prevalent, and intake of vitamin B6 and B12 was lower among vegetarians, while non-vegetarians had a lower intake of folate. Overall, no significant association was observed between vitamin B6, B12, and folate intakes and both global and subcortical brain volumes among participants with depression. However, vitamin B12 intake was positively associated with right pallidum among non-depressed participants, and a significant interaction between vitamin B12 intake and depression status on the right pallidum was observed. Also, a significant interaction between folate intake and depression status on grey matter (GM) volume and left thalamus was observed. Upon diet stratification, folate intake is associated with total brain volume and GM volume among vegetarians with depression. Furthermore, no significant associations were observed for subcortical regions. Our findings suggest that dietary intake of vitamin B6 and B12 might have an effect on brain structure. Vegetarians, particularly those who suffer from depression may benefit from supplementing their diets with vitamins B6, B12, and folate to ensure brain health. Further studies, especially with a larger sample size and longitudinal design, are needed to confirm these findings.

Effect of Growth Hormone-Releasing Factor on Plasma Growth Hormone, Prolactin and Somatomedin C in Hypopituitary and Short Normal Children

1985 ◽  
Vol 22 (1-2) ◽  
pp. 32-45 ◽  
Author(s):  
Guy Van Vliet ◽  
Danièle Bosson ◽  
Claude Robyn ◽  
Margareta Craen ◽  
Paul Malvaux ◽  
...  
Keyword(s):  
Growth Hormone ◽  
Plasma Growth Hormone ◽  
Normal Children ◽  
Somatomedin C ◽  
Growth Hormone Releasing Factor

CHANGES IN PLASMA GROWTH HORMONE LEVELS IN RETARDED CHILDREN

2008 ◽  
Vol 12 (3-4) ◽  
pp. 294-306
Author(s):  
J. HILLMAN ◽  
J. HAMMOND ◽  
J. SOKOLA ◽  
M. REISS
Keyword(s):  
Growth Hormone ◽  
Plasma Growth Hormone ◽  
Hormone Levels
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