Source: AMA Morning Rounds 8/4/2010
Wednesday, August 4, 2010
Vitamin D Deficiency
Source: AMA Morning Rounds 8/4/2010
Source: AMA Morning Rounds 8/4/2010
Consumer Reports finds 12 supplements with unsafe ingredients.
Sunday, November 29, 2009
Researchers associate low levels of vitamin D with CAD, stroke, heart failure.
Source: AMA Morning Rounds 11/17/09
Researchers associate low levels of vitamin D with CAD, stroke, heart failure.
The New York Times (11/16, Rabin) "Well" blog reported that, according to research presented Nov. 16 at the American Heart Association conference, "Americans aren't getting anywhere nearly enough of" vitamin D, "and it may be affecting their heart health." After examining data on 27,686 "healthy adults 50 and older whose vitamin D levels had been measured during routine checkups," researchers found that "those who had extremely low levels of the vitamin were almost twice as likely to have died or suffered a stroke than those with adequate amounts." In addition, they "had more coronary artery disease and were twice as likely to have developed heart failure." HealthDay (11/16, Preidt) and CNN (11/17, Mann) also cover the study.
Monday, October 26, 2009
Research suggests 20 percent of US children under 12 may not get enough vitamin D.
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Monday, January 12, 2009
Vitamin C Intake
Criteria and Recommendations for Vitamin C Intake
JAMA. 1999;281:1415-1423.
Recommendations for vitamin C intake are under revision by the Food and Nutrition Board of the National Academy of Sciences. Since 1989 when the last recommended dietary allowance (RDA) of 60 mg was published, extensive biochemical, molecular, epidemiologic, and clinical data have become available. New recommendations can be based on the following 9 criteria: dietary availability, steady-state concentrations in plasma in relationship to dose, steady-state concentrations in tissues in relationship to dose, bioavailability, urine excretion, adverse effects, biochemical and molecular function in relationship to vitamin concentration, direct beneficial effects and epidemiologic observations in relationship to dose, and prevention of deficiency. We applied these criteria to the Food and Nutrition Board's new guidelines, the Dietary Reference Intakes, which include 4 reference values. The estimated average requirement (EAR) is the amount of nutrient estimated to meet the requirement of half the healthy individuals in a life-stage and gender group. Based on an EAR of 100 mg/d of vitamin C, the RDA is proposed to be 120 mg/d. If the EAR cannot be determined, an adequate intake (AI) amount is recommended instead of an RDA. The AI was estimated to be either 200 mg/d from 5 servings of fruits and vegetables or 100 mg/d of vitamin C to prevent deficiency with a margin of safety. The final classification, the tolerable upper intake level, is the highest daily level of nutrient intake that does not pose risk or adverse health effects to almost all individuals in the population. This amount is proposed to be less than 1 g of vitamin C daily. Physicians can tell patients that 5 servings of fruits and vegetables per day may be beneficial in preventing cancer and providing sufficient vitamin C intake for healthy people, and that 1 g or more of vitamin C may have adverse consequences in some people.
Author Affiliations: Molecular and Clinical Nutrition Section, Digestive Diseases Branch, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Md (Drs Levine, Rumsey, Daruwala, and Wang); Phytonutrients Laboratory, Beltsville Human Nutrition Research Center, US Department of Agriculture, Beltsville, Md (Dr Park).
Vitamins E and C in the Prevention of Prostate and Total Cancer in Men
Vitamins E and C in the Prevention of Prostate and Total Cancer in Men
The Physicians' Health Study II Randomized Controlled Trial
JAMA. 2009;301(1):52-62. Published online December 9, 2008 (doi:10.1001/jama.2008.862).
Context Many individuals take vitamins in the hopes of preventing chronic diseases such as cancer, and vitamins E and C are among the most common individual supplements. A large-scale randomized trial suggested that vitamin E may reduce risk of prostate cancer; however, few trials have been powered to address this relationship. No previous trial in men at usual risk has examined vitamin C alone in the prevention of cancer.
Objective To evaluate whether long-term vitamin E or C supplementation decreases risk of prostate and total cancer events among men.
Design, Setting, and Participants The Physicians' Health Study II is a randomized, double-blind, placebo-controlled factorial trial of vitamins E and C that began in 1997 and continued until its scheduled completion on August 31, 2007. A total of 14 641 male physicians in the United States initially aged 50 years or older, including 1307 men with a history of prior cancer at randomization, were enrolled.
Intervention Individual supplements of 400 IU of vitamin E every other day and 500 mg of vitamin C daily.
Main Outcome Measures Prostate and total cancer.
Results During a mean follow-up of 8.0 years, there were 1008 confirmed incident cases of prostate cancer and 1943 total cancers. Compared with placebo, vitamin E had no effect on the incidence of prostate cancer (active and placebo vitamin E groups, 9.1 and 9.5 events per 1000 person-years; hazard ratio [HR], 0.97; 95% confidence interval [CI], 0.85-1.09; P = .58) or total cancer (active and placebo vitamin E groups, 17.8 and 17.3 cases per 1000 person-years; HR, 1.04; 95% CI, 0.95-1.13; P = .41). There was also no significant effect of vitamin C on total cancer (active and placebo vitamin C groups, 17.6 and 17.5 events per 1000 person-years; HR, 1.01; 95% CI, 0.92-1.10; P = .86) or prostate cancer (active and placebo vitamin C groups, 9.4 and 9.2 cases per 1000 person-years; HR, 1.02; 95% CI, 0.90-1.15; P = .80). Neither vitamin E nor vitamin C had a significant effect on colorectal, lung, or other site-specific cancers. Adjustment for adherence and exclusion of the first 4 or 6 years of follow-up did not alter the results. Stratification by various cancer risk factors demonstrated no significant modification of the effect of vitamin E on prostate cancer risk or either agent on total cancer risk.
Conclusions In this large, long-term trial of male physicians, neither vitamin E nor C supplementation reduced the risk of prostate or total cancer. These data provide no support for the use of these supplements for the prevention of cancer in middle-aged and older men.
Trial Registration clinicaltrials.gov Identifier: NCT00270647
Vitamins E and C in the Prevention of Cardiovascular Disease in Men
Vitamins E and C in the Prevention of Cardiovascular Disease in Men
The Physicians' Health Study II Randomized Controlled Trial
JAMA. 2008;300(18):2123-2133. Published online November 9, 2008 (doi: 10.1001/jama.2008.600).
Context Basic research and observational studies suggest vitamin E or vitamin C may reduce the risk of cardiovascular disease. However, few long-term trials have evaluated men at initially low risk of cardiovascular disease, and no previous trial in men has examined vitamin C alone in the prevention of cardiovascular disease.
Objective To evaluate whether long-term vitamin E or vitamin C supplementation decreases the risk of major cardiovascular events among men.
Design, Setting, and Participants The Physicians' Health Study II was a randomized, double-blind, placebo-controlled factorial trial of vitamin E and vitamin C that began in 1997 and continued until its scheduled completion on August 31, 2007. There were 14 641 US male physicians enrolled, who were initially aged 50 years or older, including 754 men (5.1%) with prevalent cardiovascular disease at randomization.
Intervention Individual supplements of 400 IU of vitamin E every other day and 500 mg of vitamin C daily.
Main Outcome Measures A composite end point of major cardiovascular events (nonfatal myocardial infarction, nonfatal stroke, and cardiovascular disease death).
Results During a mean follow-up of 8 years, there were 1245 confirmed major cardiovascular events. Compared with placebo, vitamin E had no effect on the incidence of major cardiovascular events (both active and placebo vitamin E groups, 10.9 events per 1000 person-years; hazard ratio [HR], 1.01 [95% confidence interval {CI}, 0.90-1.13]; P = .86), as well as total myocardial infarction (HR, 0.90 [95% CI, 0.75-1.07]; P = .22), total stroke (HR, 1.07 [95% CI, 0.89-1.29]; P = .45), and cardiovascular mortality (HR, 1.07 [95% CI, 0.90-1.28]; P = .43). There also was no significant effect of vitamin C on major cardiovascular events (active and placebo vitamin E groups, 10.8 and 10.9 events per 1000 person-years, respectively; HR, 0.99 [95% CI, 0.89-1.11]; P = .91), as well as total myocardial infarction (HR, 1.04 [95% CI, 0.87-1.24]; P = .65), total stroke (HR, 0.89 [95% CI, 0.74-1.07]; P = .21), and cardiovascular mortality (HR, 1.02 [95% CI, 0.85-1.21]; P = .86). Neither vitamin E (HR, 1.07 [95% CI, 0.97-1.18]; P = .15) nor vitamin C (HR, 1.07 [95% CI, 0.97-1.18]; P = .16) had a significant effect on total mortality but vitamin E was associated with an increased risk of hemorrhagic stroke (HR, 1.74 [95% CI, 1.04-2.91]; P = .04).
Conclusions In this large, long-term trial of male physicians, neither vitamin E nor vitamin C supplementation reduced the risk of major cardiovascular events. These data provide no support for the use of these supplements for the prevention of cardiovascular disease in middle-aged and older men.
Trial Registration clinicaltrials.gov Identifier: NCT00270647
Sunday, December 28, 2008
FDA reprimands Coca Cola
Department of Health and Human Services
Public Health Service
Food and Drug Administration
College Park, MD 20740
DEC 10 2008
WARNING LETTER
CERTIFIED MAIL
RETURN RECEIPT REQUESTED
Mr. Muhtar Kent
President and Chief Executive Officer
The Coca-Cola Company
1 Coca Cola Place, NW
Atlanta, GA 30313-2424
Re: CFSAN-OC-09-01
Dear Mr. Kent:
The Food and Drug Administration (FDA) has reviewed the label for your Diet Coke Plus 20 FL OZ (1.25 PT) 591ml. Based on our review, we have concluded that this product is in violation of the Federal Food, Drug, and Cosmetic Act (the Act). Your Diet Coke Plus product is misbranded within the meaning of section 403(r)(1)(A) of the Act [21 USC 343(r)(1)(A)] because the product makes a nutrient content claim but does not meet the criteria to make the claim.
Your product bears the term "Plus" as part of its name, and the principal display panel of the product label also includes the language, "Diet Coke with Vitamins & Minerals." The ingredient list includes the following added vitamins and minerals: magnesium sulfate (declared at 10% of the Daily Value (DV) for magnesium in the Nutrition Facts panel), zinc gluconate (declared at 10% of the DV for zinc), niacinamide (declared at 15% of the DV for niacin), pyridoxine hydrochloride (declared at 15% of the DV for vitamin B6), and cyanocobalamine (declared at 15% of the DV for vitamin B12).
Your product is misbranded within the meaning of section 403(r)(1)(A) of the Act because it bears the nutrient content claim "plus" but does not comply with the regulations governing the use of this claim. The term "plus" in "Diet Coke Plus," read in conjunction with the language "Diet Coke with Vitamins & Minerals," meets the definition of a nutrient content claim because it characterizes the product's level of vitamins and minerals, which are nutrients of the type required to be in nutrition labeling (21 CFR 101.13(b)). The term "plus" is defined in 21 CFR 101.54(e). This term may be used on the label or in labeling of foods to describe the level of nutrients (such as vitamins and minerals) in the food, provided that (1) the food contains at least 10 percent more of the Reference Daily Intake or Daily Reference Value for the nutrient per reference amount customarily consumed than an appropriate reference food, (2) where the claim is based on nutrients that are added to the food, that the fortification is in accordance with the policy on fortification of foods in 21 CFR 104.20, and (3) the claim bears the required information for relative claims as described in 21 CFR 101.13(j)(2) and 101.54(e)(1)(iii).
Your product Diet Coke Plus is a carbonated beverage. The policy on fortification in 21 CFR 104.20(a) states that the FDA does not consider it appropriate to fortify snack foods such as carbonated beverages. Additionally, the label of your product does not state the identity of a reference food and the percentage (or fraction) of the amount of the nutrient in the reference food by which the nutrient in the labeled food differs, as is required for relative claims such as "plus" under 101.13(j)(2). Therefore, the "plus" claim on the label of this product does not meet the requirements of 21 CFR 101.54(e)(1).
The above violations are not meant to be an all-inclusive list of deficiencies in your products or their labeling. It is your responsibility to ensure that all of your products are in compliance with the laws and regulations enforced by FDA. You should take prompt action to correct the violations. Failure to promptly correct these violations may result in regulatory actions without further notice, such as seizure and/or injunction.
You should take prompt action to correct these violations. Please respond to this letter within 15 days from receipt with the actions you plan to take in response to this letter, including an explanation of each step being taken to correct the current violations and prevent similar violations. Include any documentation necessary to show that correction has been achieved. If you cannot complete corrective action within fifteen working days, state the reason for the delay and the time within which you will complete the correction.
You should direct your written reply to Felicia B. Williams, Food and Drug Administration, Center for Food Safety and Applied Nutrition, 5100 Paint Branch Parkway, Office of Compliance (HFS-608), Division of Enforcement, College Park, Maryland 20740-3835.
Sincerely,
/S/
Roberta F. Wagner
Director
Office of Compliance
Center for Food Safety
And Applied Nutrition