Vegetarisch - voor iedereen > Lekker gezond

Wetenschappelijk onderzoek naar vegetarisme

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Christiaan:

--- Citaat van: eno2 op 31 mei 2011, 12:53:04 ---B12 deficiëntie is notoir in sommige vegetarische diëten

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De conclusie luidt dan ook niet expliciet dat ALLE vegetarische diëten voldoen aan de aanbevelingen voor... (etc)

Je bent spijkers op laag water aan het zoeken.

Christiaan:

--- Citaat van: fem fatale op 31 mei 2011, 18:57:01 ---Ik vind het nogal raar dat er de aanname wordt gemaakt dat vegetariers een lagere BMI hebben puur door het vegetarisch eten, en niet omdat, ik noem maar eens wat, vegetariers heel bewust bezig met voedsel, en vanuit die bewustheid niet alleen vega eten, maar op de calorie-inname letten.

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Of dat vegetariers gemiddeld hoger opgeleid zijn, een hogere sociale status hebben en dat overgewicht relatief vaker voorkomt bij de maatschappelijk gezien lagere klassen.

eno2:

--- Citaat van: Robjee op 31 mei 2011, 17:26:43 ---
Wat is de onjuistheid? Ze attenderen erop dat vitamine B12 aandacht verdiend, maar dat een vegetarische voeding wel in de behoefte daaraan kan voldoen.

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Je lijkt gelijk te hebben

kan ik het weer eens opnieuw gaan lezen

(vegetarisme is inderdaad te breed om in moeilijkheden te komen met B12)

Robjee:
Abstract
Objective To examine the associations of a vegetarian diet and dietary fibre intake with risk of diverticular disease.

Design
Prospective cohort study.

Setting
The EPIC-Oxford study, a cohort of mainly health conscious participants recruited from around the United Kingdom.

Participants
47 033 men and women living in England or Scotland of whom 15 459 (33%) reported consuming a vegetarian diet.

Main outcome measures
Diet group was assessed at baseline; intake of dietary fibre was estimated from a 130 item validated food frequency questionnaire. Cases of diverticular disease were identified through linkage with hospital records and death certificates. Hazard ratios and 95% confidence intervals for the risk of diverticular disease by diet group and fifths of intake of dietary fibre were estimated with multivariate Cox proportional hazards regression models.

Results
After a mean follow-up time of 11.6 years, there were 812 cases of diverticular disease (806 admissions to hospital and six deaths). After adjustment for confounding variables, vegetarians had a 31% lower risk
(relative risk 0.69, 95% confidence interval 0.55 to 0.86) of diverticular disease compared with meat eaters. The cumulative probability of admission to hospital or death from diverticular disease between the
ages of 50 and 70 for meat eaters was 4.4% compared with 3.0% for vegetarians. There was also an inverse association with dietary fibre intake; participants in the highest fifth (≥25.5 g/day for women and ≥26.1 g/day for men) had a 41% lower risk (0.59, 0.46 to 0.78; P<0.001 trend)
compared with those in the lowest fifth (<14 g/day for both women and men). After mutual adjustment, both a vegetarian diet and a higher intake of fibre were significantly associated with a lower risk of diverticular disease.

Conclusions
Consuming a vegetarian diet and a high intake of dietary fibre were both associated with a lower risk of admission to hospital or death from diverticular disease.

http://www.bmj.com/content/343/bmj.d4131.full.pdf

Hizikigrrrl:
Nutrition. 2011 Aug 26. [Epub ahead of print]

Vegetarianism produces subclinical malnutrition, hyperhomocysteinemia and atherogenesis.
Ingenbleek Y, McCully KS.


Source

Laboratory of Nutrition, Faculty of Pharmacy, University Louis Pasteur, Strasbourg, France.


Abstract

OBJECTIVE:

To explain why vegetarian subjects develop morbidity and mortality from cardiovascular diseases unrelated to vitamin B status and Framingham criteria.

METHODS:

A study of 24 rural male subjects 18 to 30 y old and 15 urban male controls was conducted in the Sahel region of Chad. Food consumption was determined from a dietary questionnaire, and overall health status was assessed by body weight, body mass index, serum albumin, plasma transthyretin, urinary nitrogen, and creatinine. Plasma lipids, vitamins B6, B9 and B12, homocysteine, and related sulfur amino acids were measured as selected cardiovascular disease risk factors.

RESULTS:

Body weight, body mass index, blood, and urinary markers of protein status were significantly lower, with an estimated 10% decrease of lean body mass in the study group compared with urban controls. Neither lipid fractions nor plasma levels of vitamins B6, B9, and B12 were significantly different between the two groups. Although the mean consumption of sulfur amino acids (10.4 mg·kg(-1)·d(-1)) by rural subjects was significantly below the recommended dietary allowances (13 mg·kg(-1)·d(-1)), plasma methionine values were similar in the two groups. In contrast, homocysteine concentration was significantly increased (18.6 μmol/L, P < 0.001), and the levels of cysteine and glutathione were significantly decreased in the study group, demonstrating inhibition of the trans-sulfuration pathway. The strong negative correlation (r = -0.71) between transthyretin and homocysteine implicated lean body mass as a critical determinant of hyperhomocysteinemia.

CONCLUSION:

The low dietary intake of protein and sulfur amino acids by a plant-eating population leads to subclinical protein malnutrition, explaining the origin of hyperhomocysteinemia and the increased vulnerability of these vegetarian subjects to cardiovascular diseases.

http://www.ncbi.nlm.nih.gov/pubmed/21872435?dopt=Abstract


Ik ben vooral verbaasd dat ze vegetariers (of flexitariers) in de Sahel hebben gevonden ???

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