[QUOTE=Qadgop the Mercotan]
Not to speak for the good and esteemed KarlGauss, but vitamin therapy is mostly bogus, unless you are deficient in the vitamin in question. And 99.999% of folks in the US are not. No normal person following the U.S. Dietary Guidelines is in any danger of vitamin deficiency.
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Sure. But Doc, few dudes follow the US Dietary Guidelines. Vitamin Supplements are useful to a variety of the population, as these cites show:
“The response rate to vitamin supplements supports the notion that metabolic evidence of vitamin deficiency is common in the elderly, even in the presence of normal serum vitamin levels. Metabolite assays permit identification of elderly subjects who may benefit from vitamin supplements.”
(Pregnant women with HIV, warning PDF)
http://www.dr-rath-foundation.org.za/pdf-files/jan05/document_h.pdf
http://edrv.endojournals.org/cgi/content/abstract/22/4/477
Vitamin D deficiency is common in the elderly, especially in the housebound and in geriatric patients. The establishment of strict diagnostic criteria is hampered by differences in assay methods for 25-hydroxyvitamin D. The synthesis of vitamin D3 in the skin under influence of UV light decreases with aging due to insufficient sunlight exposure, and a decreased functional capacity of the skin. The diet contains a minor part of the vitamin D requirement. Vitamin D deficiency in the elderly is less common in the United States than elsewhere due to the fortification of milk and use of supplements. Deficiency in vitamin D causes secondary hyperparathyroidism, high bone turnover, bone loss, mineralization defects, and hip and other fractures. Less certain consequences include myopathy and falls. A diet low in calcium may cause an increased turnover of vitamin D metabolites and thereby aggravate vitamin D deficiency. Prevention is feasible by UV light exposure, food fortification, and supplements. Vitamin D3 supplementation causes a decrease of the serum PTH concentration, a decrease of bone turnover, and an increase of bone mineral density. Vitamin D3 and calcium may decrease the incidence of hip and other peripheral fractures in nursing home residents. Vitamin D3 is recommended in housebound elderly, and it may be cost-effective in hip fracture prevention in selected risk groups.
"A meta-analysis of 12 randomized trials of vitamin supplements to lower homocysteine levels was carried out to determine the optimal dose of folic acid required to lower homocysteine levels and to assess whether vitamin B 12 or vitamin B6 had additive effects. This meta-analysis demonstrated that reductions in blood homocysteine levels were greater at higher pretreatment blood homocysteine levels and at lower pretreatment folate concentrations. After standardization for a pretreatment homocysteine concentration of 12 µmol/L and folate concentration of 12 nmol/L (approximate average concentrations for western populations), dietary folic acid reduced homocysteine levels by 25% (95% confidence interval [CI]: 23 to 28%) with similar effects in a daily dosage range of 0.5 to 5 mg. Vitamin B 12 (mean 0.5 mg) produced an additional reduction in blood homocysteine of 7%, whereas vitamin B 6 (mean 16.5 mg) did not have any significant effect. Hence, in typical populations, daily supplementation with both 0.5 to 5 mg folic acid and about 0.5 mg vitamin B 12 would be expected to reduce homocysteine levels by one quarter to one third (from about 12 µmol/L to about 8 to 9 µmol/L). Large-scale randomized trials of such regimens are now required to determine whether lowering homocysteine levels by folic acid and vitamin B 12, with or without added vitamin B6, reduces the risk of vascular disease. "
Research during the last 5 years has made it clear that people who do not take folic acid supplements are at increased risk for functional folate deficiency, which has been proven to cause spina bifida and anencephaly and also has been associated with an increased risk for occlusive cardiovascular disease. The overriding folate policy issue is how to increase dramatically the folate consumption of 75% of the population who are now consuming 0.4 mg of folic acid in a supplement. The most expeditious way to increase consumption is through fortification of a food staple. Public health programs are also needed to educate people about the vital importance of increased consumption of folic acid vitamin supplements and of food rich in natural folates. It is urgent that fortification of cereal-grain products be implemented now. The level proposes by FDA would accomplish some prevention, but much more prevention would occur if the fortification were 2.5 times that level. Fortification at the higher level would prevent about 1000 spina bifida and anencephaly birth defects each year and perhaps as many as 50,000 premature deaths each year from coronary disease. Available data have not demonstrated that increasing consumption of folic acid by 0.1 to 0.25 mg of folic acid a day is harmful. If a policy needs to be established on the assumption that people who take vitamin supplements could be harmed, a good policy option ia available; require that all folic acid vitamin supplements also contain 0.4 mg of vitamin B-12"
Vitamin B12 deficiency is estimated to affect 10%–15% of people over the age of 60, and the laboratory diagnosis is usually based on low serum vitamin B12 levels or elevated serum methylmalonic acid and homocysteine levels.
http://www.springerlink.com/content/lt26654g0873p83h/
The efficacy of calcium (Ca) in reducing bone loss is debated. In a randomized placebo-controlled double-masked study, we investigated the effects of oral Ca supplements on femoral shaft (FS), femoral neck (FN) and lumbar spine (LS) bone mineral density (BMD), and on the incidence of vertebral fracture in vitamin-D-replete elderly. …Thus, oral Ca supplements prevented a femoral BMD decrease and lowered vertebral fracture rate in the elderly."
We conclude that in elderly postmenopausal women with spine fractures and selfselected calcium intakes of < 1 g/day, a calcium supplement of 1.2 g/day reduces the incidence of spine fractures and halts measurable bone loss.
Here’s a PDF on “what vitamins do I need Doctor?”
http://www.direct-ms.org/pdf/nutritionGeneral/WillettVitamins.pdf
“Given the greater likelihood of benefit than harm, we conclude that a daily multivitamin that does not exceed the RDA make sense for most adults… A multivitamin is especially important for women who might become pregnant; for persons who regularly consume one or two alcholic beverages a day; for the elderly…; for vegans…; and for poor urban residents, who may be unable to afford adequate intakes of fruits and vegetables”. To that I’ll add: “those who just plain *don’t * eat a balanced diet.”
Oddly, dudes who do take supplements are less likely to need them that those who don’t! :eek: :
http://jn.nutrition.org/cgi/content/abstract/135/7/1782
*Use of dietary supplements may be one of a number of health-related behaviors that cluster together. The current study investigated the underlying diet, health-related characteristics, and behaviors of users and nonusers of dietary supplements in a longitudinal study of health. Participants (n = 1776) completed a 5-d food diary including information on dietary supplement use (vitamins, minerals, and nutraceuticals) at age 53 y. Sociodemographic information and data on smoking, alcohol, and physical activity were obtained along with anthropometric measurements, blood pressure, and a blood sample (nonfasting subjects). A significantly greater percentage of women reported supplement use compared with men (45.1 vs. 25.2%). Supplement use was associated with lower BMI, lower waist circumference, higher plasma folate and plasma vitamin B-12 concentrations, nonsmoking, participation in physical activity, and nonmanual social class in women and with plasma folate concentrations and participation in physical activity in men. Nonsupplement users tended to be nonconsumers of breakfast cereals, fruit, fruit juice, yogurt, oily fish, and olive oil and had lower dietary intakes of potassium, magnesium, phosphorus, iron, and vitamin C even after adjustment for sociodemographic and behavioral factors. Overall, supplement users tended to differ from nonsupplement users on a range of health-related behaviors and health status indicators, although there were fewer significant associations in men. Similarly, dietary supplements users tended to have underlying diets that, were healthier and those taking supplements may be the least likely to need them. These results support the notion of a clustering of healthy behaviors and cardiovascular risk factors, particularly for women. *
But yeah, The good Doctor Qadgop is right- it’s more important and better for you to eat right than pop a pill. However, OTOH I agree with Drs. WC Willett, MJ Stampfer *et al, * in that a moderate priced and moderate potency multivite “makes sense for most adults”. YMMV. Consult your personal Physician. Eat right, get some sun and fresh air, excercise, get a physical. No pill can really substitute for those.