Vitamin D and water needs

[Guest guest]

Hi All,

CR associates with osteoporosis and CRers often resort to high intakes of

fluids.

The three pdf-available papers not in Medline yet from the two June issues of

Nutr

Rev are a paper for which the title may be the message: vitamin D from sunlight

may

be insufficient.

Two other papers are on our water needs and 3.7 l/day for men seemed to

represent a

high fluid intake level.

Living in Low-Latitude Regions in the United States Does Not Prevent Poor

Vitamin D

Status.

By: Sohyun Park; , Ann.

Nutrition Reviews, Jun2005, Vol. 63 Issue 6, p203, 7p

Human Water Needs.

By: Sawka, N.; Cheuvront, N.; III, .

Nutrition Reviews, Jun2005 Supplement, Vol. 63, pS30, 10p

Healthy humans regulate daily water balance remarkably well across their

lifespan

despite changes in biological development and exposure to stressors on hydration

status. Acute or chronic body water deficits result when intakes are reduced or

losses increase, but day-to-day hydration is generally well maintained so long

as

food and fluid are readily available. Total water intake includes drinking

water,

water in beverages, and water in food. Daily water needs determined from fluid

balance, water turnover, or consumption studies provide similar values for a

given

set of conditions. A daily water intake of 3.7 L for adult men and 2.7 L for

adult

women meets the needs of the vast majority of persons. However, strenuous

physical

exercise and heat stress can greatly increase daily water needs, and the

individual

variability between athletes can be substantial.

The Importance of Good Hydration for the Prevention of Chronic Diseases. By:

Manz,

Friedrich; Wentz, s. Nutrition Reviews, Jun2005 Supplement, Vol. 63, pS2,

4p

There is increasing evidence that mild dehydration plays a role in the

development

of various morbidities. In this review, the effects of hydration status on

chronic

diseases are categorized according to the strength of the evidence. Positive

effects

of maintenance of good hydration are shown for urolithiasis (category Ib

evidence);

constipation, exercise asthma, hypertonic dehydration in the infant, and

hyperglycemia in diabetic ketoacidosis (all category IIb evidence); urinary

tract

infections, hypertension, fatal coronary heart disease, venous thromboembolism,

and

cerebral infarct (all category III evidence); and bronchopulmonary disorders

(category IV evidence). For bladder and colon cancer, the evidence is

inconsistent.

.... Papers were classified according to following categories of evidence:

Ia: Evidence from a meta-analysis of

randomized, controlled trials;

Ib: Evidence from at least one randomized,

controlled trial;

IIa: Evidence from at least one controlled study

without randomization;

IIb: Evidence from at least one other type of

quasi-experimental study;

III: Evidence from descriptive studies, such as

comparative studies, correlation studies,

and case control studies;

IV: Evidence from expert committee reports,

opinions or clinical experience of

respected authorities, or both.

Al Pater, PhD; email: old542000@...

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