Navigation Links
Glucosamine Supplements Tied to Risk of Eye Condition
Date:5/23/2013

By Denise Mann
HealthDay Reporter

THURSDAY, May 23 (HealthDay News) -- Glucosamine supplements that millions of Americans take to help treat hip and knee osteoarthritis may have an unexpected side effect: They may increase risk for developing glaucoma, a small new study of older adults suggests.

Glaucoma occurs when there is an increase of intraocular pressure (IOP) or pressure inside the eye. Left untreated, glaucoma is one of the leading causes of blindness.

In the new study of 17 people, whose average age was 76 years, 11 participants had their eye pressure measured before, during and after taking glucosamine supplements. The other six had their eye pressure measured while and after they took the supplements.

Overall, pressure inside the eye was higher when participants were taking glucosamine, but did return to normal after they stopped taking these supplements, the study showed.

"This study shows a reversible effect of these changes, which is reassuring," wrote researchers led by Dr. Ryan Murphy at the University of New England College of Osteopathic Medicine in Biddeford, Maine. "However, the possibility that permanent damage can result from prolonged use of glucosamine supplementation is not eliminated. Monitoring IOP in patients choosing to supplement with glucosamine may be indicated."

Exactly how glucosamine supplements could affect pressure inside the eye is not fully understood, but several theories exist. For example, glucosamine is a precursor for molecules called glycosaminoglycans, which may elevate eye pressure.

The findings are published online May 23 as a research letter in JAMA Ophthalmology.

The study had some shortcomings. Researchers did not have information on the dose or brand of glucosamine used, and they did not know how long some participants were taking the supplements.

Duffy MacKay, vice president for scientific and regulatory affairs at the Council for Responsible Nutrition, a Washington, D.C.-based trade group representing supplement manufacturers, said the findings don't mean that people should stop taking the supplements.

"This research letter raises questions and introduces a hypothesis that should be explored further, but the small number of cases investigated and the [fact that] researchers did not count capsules or control for dose or intake or duration of use of glucosamine provide extremely limited evidence of harm," MacKay said.

"This study should not change consumer habits; however, individuals with glaucoma or ocular hypertension who are taking glucosamine should let their doctor know so that the appropriate monitoring of intraocular pressure measurements can be done to identify any changes," he said.

MacKay concluded: "The good news is that increased IOP was reversible. So if you take the product, and your IOP goes up, then you can stop taking the product to see if it returns to normal."

However, previous studies have raised questions about whether glucosamine supplements provide any health benefit to consumers. A large recent study concluded it had no healing effect on arthritic pain.

The potential relationship between glucosamine and glaucoma is new to Dr. Scott Fudemberg, a glaucoma surgeon at Wills Eye Institute, in Philadelphia. "The mechanism about how people can develop glaucoma isn't completely understood, so how the supplements may play a role isn't completely understood either," he said.

While the study found an association between taking glucosamine and increased eye pressure, it didn't establish a cause-and-effect relationship.

The best thing that anyone can do to preserve their vision is to get regular eye exams, Fudemberg advised. "Glaucoma can be treated with medications, lasers and/or surgery," he said. "These findings pose a question about whether oral glucosamine can raise intraocular eye pressure, but it doesn't provide an answer. More research is now needed before any conclusions can be drawn."

More information

Are you at risk for glaucoma? Find out at the Glaucoma Research Foundation.

SOURCES: Scott J. Fudemberg, M.D., glaucoma surgeon, Wills Eye Institute, Philadelphia; Duffy MacKay, N.D., vice president, scientific and regulatory affairs, Council for Responsible Nutrition, Washington, D.C.; May 23, 2013, JAMA Ophthalmology, online


'/>"/>
Copyright©2012 ScoutNews,LLC.
All rights reserved  

Related medicine news :

1. Omega-3 Supplements No Help Against Repeat Heart Trouble: Review
2. Fish Oil Supplements Wont Help in Multiple Sclerosis: Study
3. Supplements and cancer prevention: A cautionary tale
4. Dietary supplements increase cancer risk
5. Body Building, Diet Supplements Linked to Liver Damage: Study
6. Omega-3 Supplements May Not Aid Aging Brain
7. True-Dose to Exhibit Liquid Pet Supplements at the Cardinal Health Retail Business Conference in Orlando, FL on July 11-14
8. SupplementsToWeightLoss LLC (DBA: PharmaCo Labs) and also Classe Wines LLC announced that they have signed a 5 years lease on a warehouse
9. Iron supplements can reduce fatigue in nonanemic women
10. Study questions value of calcium and vitamin D supplements
11. Calcium, Vitamin D Supplements May Pose Risks for Men With Prostate Cancer
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Glucosamine Supplements Tied to Risk of Eye Condition
(Date:5/26/2016)... ... May 26, 2016 , ... There are many ways to cook a hot ... suggests that Americans prefer their dogs straight off the grill. Of the 90 percent ... favorite way to cook a hot dog, far outpacing other cooking methods such as ...
(Date:5/26/2016)... ... , ... Connor Sports, through its Connor Cares initiative, will continue ... Catchings Legacy Tour that will commemorate the Indiana Fever legend’s hall-of-fame career and ... forms and levels of the game, Connor Sports has committed to a significantly increased ...
(Date:5/26/2016)... ... ... MadgeTech will be showcasing its line of data logging products , ... MadgeTech headquarters. With products sold in more than 100 countries around the world, MadgeTech ... , In 2012, NASA strategically set up 17 RHTemp101A MadgeTech data loggers around ...
(Date:5/26/2016)... ... May 26, 2016 , ... Memorial Day Weekend marks the ... Insurance is sharing tips to make sure your family and vehicle are ready ... Safety Council, there may be 439 deaths and an additional 50,500 serious injuries from ...
(Date:5/26/2016)... Rafael, CA (PRWEB) , ... May 26, 2016 ... ... will be offering campers a multitude of activities from daily practices, arts & ... self-confidence. , Camp Directors Amber East-D’Anna and Christy Evans have combined backgrounds in ...
Breaking Medicine News(10 mins):
(Date:5/25/2016)... May 25, 2016 MedDay, a biotechnology ... that an oral presentation entitled "High doses of biotin in ... will be given by Professor Ayman Tourbah , Principal ... of the European Academy of Neurology (EAN) in ... disorders 3" will take place on Sunday, 29 May 2016 ...
(Date:5/24/2016)... 24, 2016   ... primären Endpunkte und demonstriert Ebenbürtigkeit bei ... ‚ausgezeichneter plus guter , ...      (Logo: http://photos.prnewswire.com/prnh/20130829/633895-a ) ... positive Daten von der MORA-Studie der Phase III ...
(Date:5/24/2016)... May 24, 2016 Celsion Corporation (NASDAQ: ... company, today provided an update on its ongoing ... trial combining GEN-1, the Company,s DNA-based immunotherapy, with ... newly-diagnosed patients with advanced ovarian cancer who will ... GEN-1 is an IL-12 DNA plasmid vector formulated ...
Breaking Medicine Technology: