Newsletter

Newsletter

Vitamin C Levels Improved Vascular Function In Type 1 Diabetes

Life Extension Update Exclusive

June 30, 2009

Higher vitamin C levels associated with improved vascular function in type 1 diabetes

Higher vitamin C levels associated with improved vascular function in type 1 diabetes

In an article published online on June 24, 2009 in the American Journal of Clinical Nutrition, Scandinavian researchers report that young type 1 diabetic patients with higher vitamin C levels have better vascular function compared to those with lower levels of the vitamin. Vascular function and structure changes can occur early in type 1 diabetes, and are associated with a greater risk of cardiovascular disease and cardiovascular mortality later in life.

Petru Liuba and Michael Odermarsky of Lund University Hospital in Sweden, along with Jens Lykkesfeldt of the University of Copenhagen in Denmark, recruited 33 male and 26 female diabetic patients between the ages of 10 and 22 for the current study. Carotid intima-media thickness (cIMT, which measures atherosclerosis), assessments of cutaneous microvascular function, cardiac depolarization and repolarization (evaluated via electrocardiogram as QT interval corrected for heart rate, which, when prolonged, is a predictor of adverse cardiovascular prognosis), lipids, and plasma C-reactive protein, fibrinogen, vitamin C and oxidized vitamin C (dehydroascorbic acid) were assessed.

For subjects whose plasma vitamin C levels were among the lowest third of participants, carotid artery intima-media thickness and QT interval duration were greater than those whose vitamin C levels were in the highest third. Additionally, an assessment of cutaneous microvascular response was reduced in those whose vitamin C levels were lowest.

Oxidized vitamin C was found to increase as vitamin C levels decreased--a correlation that has been found in smokers. The finding suggests the presence of high oxidative stress levels in type 1 diabetes patients.

"It is not yet known whether vitamin C supplementation at a younger age could decelerate intimal thickening or retard the onset of cardiovascular complications in later life," the authors write. "On the basis of the epidemiologic evidence, this might be an important task for future studies given the predictive value of childhood cIMT in atherosclerosis progression and complications in the adult life."

Printer Friendly Save as PDF Email this Page View Archive Subscribe Today
Health Concern Life Extension Highlight

Diabetes

There are two types of diabetes: type 1 and type 2. Underlying either form of diabetes is a disorder of insulin production, use, or both. Insulin is a hormone responsible for transporting glucose into cells. When there is excess glucose in the blood, insulin is secreted from the pancreas and signals the liver and muscles to store glucose as glycogen. Insulin also stimulates adipose tissue to store glucose as fat for long-term energy reserves. Insulin receptors are found in all cells throughout the body. In a healthy person, blood glucose levels are extremely stable (Kumar V et al 2005). Normal fasting glucose levels range between 70 and 100 mg/dL.

Type 1 diabetes. Type 1 diabetes, formerly known as insulin-dependent diabetes, is an autoimmune condition that occurs when the body attacks and destroys the cells (called beta cells) that make insulin. Type 1 diabetes accounts for about 5 to 10 percent of cases. Because type 1 diabetics can no longer make insulin, insulin replacement therapy is essential.

Type 2 diabetes. Type 2 diabetes, formerly known as non-insulin-dependent diabetes, occurs when the body is no longer able to use insulin effectively and gradually becomes resistant to its effects. It is a slowly progressing disease that goes through identifiable stages. In the early stages of diabetes, both insulin and glucose levels are elevated (conditions called hyperinsulinemia and hyperglycemia, respectively). In the later stages, insulin levels are reduced, and blood glucose levels are very elevated. Although few people are aware of this crucial distinction, therapy for type 2 diabetes should be tailored to the stage of the disease.

Glycation and oxidative stress are central to the damage caused by diabetes. Unfortunately, neither of them figures into conventional treatment for diabetes, which is generally concerned only with blood sugar control.

In one clinical study, vitamin C significantly increased blood flow and decreased inflammation in patients with both diabetes and coronary artery disease (Antoniades C et al 2004). Three studies suggest that vitamin C, along with a combination of vitamins and minerals (Farvid MS et al 2004), reduces blood pressure in people with diabetes (Mullan BA et al 2002) and increases blood vessel elasticity and blood flow (Mullan BA et al 2004).

 

 

Yes, We Can . . . Think Outside the Box
A conference on science-based medicine, Nova University, Fort Lauderdale, Florida
October 3-4, 2009

Topics Will Include:

  • Evolution of bio-identical hormone therapy
  • Stepping above the standard of care: By the book
  • Genomics: A key to personalized and individualized medicine
  • Endocrinology: The things we never learned in school about balancing our glands and hormones
  • What’s best for your practice and your patient: The legal and political ramifications
  • Neurotransmitters: The biochemistry and balancing of Your body’s messengers
  • “Let Your Food Be Your Medicine and Your Medicine Be Your Food”: Yes, Clinical Nutrition is Science-Based
  • What’s Best for Your Practice & Your Patient: The Legal and Political Ramifications
  • Compounded Medications: The Bioavailability and Other Considerations When Choosing How to Design Protocols for Your Patients
  • Testing: New Advances in Testing Including Saliva, Urine, Hair, Feces and Blood
  • Amazing New Advances in Weight Loss Using Herbs
  • Vitamin D…the Little-Known Hormone that May Save Your Life
  • Putting Nutraceuticals and Natural Products into Your Practice
  • Mood Therapies/Chronic Fatigue Syndrome
  • Obesity and GI Disorders

https://www.lifeextension.com/OutsideTheBox

For those conference participants who might need to book accommodations, Life Extension has secured a special rate of $89 per night for a limited number of rooms at The Westin Fort Lauderdale. Additional days at this rate before or after the event will be based on availability. Reservations must be made by September 2, 2009. Shuttle service to and from Nova University will be provided.

  • Outdoor whirlpool
  • WestinWORKOUT® gym
  • Wake-up service available
  • Luggage storage
  • Express check-out
  • And many more special features!

Call 1-800-791-4457 or visit http://www.levacations.com/product_info.php?products_id=721

Featured Products

Super CLA Blend with Sesame Lignans

add to cart

Researchers have continued to discover CLA’s multi-faceted health benefits including its ability to increase lean body mass and help maintain a healthy weight.

Research indicates that three grams of CLA taken daily may be enough to trigger a modest loss in body fat in humans. A Norwegian study documented significant body-fat loss with just 1.8 grams of CLA per day.

Hi-Lignan® Nutri-flax®

Lignans are natural phytochemicals. Hi-Lignan® Nutri-Flax® is the true high lignan product with an amazing 225 mg of lignans per serving. Scientific research has shown lignans to have numerous health benefits for men and women:

  • High in dietary fiber, containing both soluble and insoluble fiber
  • Good source of plant-derived omega-3 fatty acids
  • Very low sodium content
  • Potassium to sodium ratio of 17:1
  • Preserves nature’s balance of crucial electrolytes
News Archive

Life Extension Update

What's Hot

Life Extension magazine

If you have questions or comments concerning this issue or past issues of Life Extension Update, send them to ddye@lifeextension.com or call 1-800-678-8989.

For longer life,

Dayna Dye
Editor, Life Extension Update
ddye@lifeextension.com
954 766 8433 extension 7716
www.lifeextension.com
Sign up for Life Extension Update

For copyright permission, please refer to Life Extension copyright policy