ProHealth health Vitamin and Natural Supplement Store and Health
Home  |  Log In  |  My Account  |  View Cart  View Your ProHealth Vitamin and Supplement Shopping Cart
800-366-6056  |  Contact Us  |  Help
Facebook Google Plus
Fibromyalgia  Chronic Fatigue Syndrome & M.E.  Lyme Disease  Natural Wellness  Supplement News  Forums  Our Story
Store     Brands   |   A-Z Index   |   Best Sellers   |   New Products   |   Deals & Specials   |   Under $10   |   SmartSavings Club

Trending News

16 Tips from 16 Years Sick

Fibromyalgia Fare Fit for All Seasons

Tangerine Oil: A Citrusy Essential Oil With Well-Rounded Uses

New Study Shows Artificial Sweeteners Lead to Diabetes

Essential Oils — An Effective and Healthy Option to Treat Headaches

Antioxidant treatment could halt neurodegeneration in early Parkinson's

Higher vitamin D levels associated with less severe disease in NAFLD patients

Krill Oil: Make This Omega-3 Supplement Part of Your Health Regimen

How zinc helps fight esophageal cancer

Everything You Need to Know About Black Cohosh

 
Print Page
Email Article

Vitamin A Deficiency Disorders: International Efforts to Control A Preventable "Pox"

  [ 54 votes ]   [ Discuss This Article ]
www.ProHealth.com • January 7, 2004


Barbara A. Underwood2

Institute of Medicine, National Academies, 2101 Constitution Ave., NW, Washington, D.C. 20418

2To whom correspondence should be addressed. E-mail: e-mail: bunderwo@adnc.com.

Visual symptoms (night blindness) of vitamin A deficiency (VAD) were among the earliest diet-related deficiencies documented. Knowledge of vitamin A chemistry, metabolism and deficiency consequences accrued rapidly during the first eight decades of the 20th century. A series of disorders were described in animals, including impaired growth, reproduction, epithelial integrity, and disease resistance that were relieved by consumption of both animal and plant sources of the vitamin.

Identification of the intestinal beta-carotene cleavage enzyme in the laboratory of James Allen Olson was seminal to understanding the mechanism for formation of vitamin A from ingested carotenoids. WHO’s 1990 estimate of about 40 million children annually with clinical eye signs of VAD was revised upward to 140–250 million at risk of vitamin A deficiency disorders (VADD) when epidemiological and clinical trials demonstrated morbidity and mortality risk even in the absence of ocular signs. Alternative methods for VAD status assessment and more reliable analytical techniques were developed, several in Dr. Olson’s laboratory. The last decade has seen global progress in VADD control by expanding distribution of medicinal supplements, fortification of foods and dietary diversification through horticulture and education programs.

Experience shows that achievements gained through narrowly focused interventions are fragile and vulnerable to national political and economic instability. Contextually relevant, community-centered strategies that improve household food and nutrition security and self-reliance are critical to sustaining international efforts to control the VADD "pox."



Post a Comment

Featured Products From the ProHealth Store
Energy NADH™ 12.5mg Ultra EPA  - Fish Oil Vitamin D3 Extreme™


Article Comments



Be the first to comment on this article!

Post a Comment


 
Optimized Curcumin Longvida with Omega-3

Featured Products

Ultra EPA  - Fish Oil Ultra EPA - Fish Oil
Ultra concentrated source of essential fish oils
Mitochondria Ignite™ with NT Factor® Mitochondria Ignite™ with NT Factor®
Reduce Fatigue up to 45%
Ultra ATP+, Double Strength Ultra ATP+, Double Strength
Get energized with malic acid & magnesium
FibroSleep™ FibroSleep™
The All-in-One Natural Sleep Aid
Vitamin D3 Extreme™ Vitamin D3 Extreme™
50,000 IU Vitamin D3 - Prescription Strength

Natural Remedies

Can Autoimmune Conditions be Reversed? Researchers Make a Surprising Discovery Can Autoimmune Conditions be Reversed? Researchers Make a Surprising Discovery
Breakthrough Form of Magnesium Enhances Memory and Cognitive Function Breakthrough Form of Magnesium Enhances Memory and Cognitive Function
Block Acid Reflux to Prevent Esophageal Problems! Block Acid Reflux to Prevent Esophageal Problems!
Fatigue & Fibro Fog: Could You Have a B-12 Deficiency? Fatigue & Fibro Fog: Could You Have a B-12 Deficiency?
Why Berries Offer a Rainbow of Health Benefits Why Berries Offer a Rainbow of Health Benefits

CONTACT US
ProHealth, Inc.
555 Maple Ave
Carpinteria, CA 93013
(800) 366-6056  |  Email

· Become a Wholesaler
· Vendor Inquiries
· Affiliate Program
SHOP WITH CONFIDENCE
Credit Card Processing
SUBSCRIBE TO OUR NEWSLETTERS
Get the latest news about Fibromyalgia, M.E/Chronic Fatigue Syndrome, Lyme Disease and Natural Wellness

CONNECT WITH US ProHealth on Facebook  ProHealth on Twitter  ProHealth on Pinterest  ProHealth on Google Plus

© 2017 ProHealth, Inc. All rights reserved. Pain Tracker App  |  Store  |  Customer Service  |  Guarantee  |  Privacy  |  Contact Us  |  Library  |  RSS  |  Site Map