06 June 2012

Milk Ingredient, Nicotinamide Riboside, Protects Against Obesity

Nicotinamide Riboside (NR) is a nutrient found in milk. It is one of three substances known to provide a source for the production of Nicotinamide adenine dinucleotide (NAD+).

The two other sources of NAD+ are Nicotinic Acid (Na) and Nicotinamide (Nam). But NAD+ derived from milk's nicotinamide riboside appears to be the most promising for raising NAD+ in the brain.

NAD+ is a coenzyme found in all living cells. It is essential for life in all organisms, both as a coenzyme for oxidoreductases (an enzyme that catalyzes the transfer of electrons from one molecule to another) and as a source of ADPribosyl groups used in various reactions, including those that retard aging in experimental systems.

Milk ingredient does a waistline good

A natural ingredient found in milk can protect against obesity even as mice continue to enjoy diets that are high in fat. The researchers who report their findings in the June Cell Metabolism, a Cell Press publication, liken this milk ingredient to a new kind of vitamin.

"This is present in what we've all been eating since day one," says Johan Auwerx of École Polytechnique Fédérale de Lausanne.

The researchers identified this ingredient, known as nicotinamide riboside, as they were searching for alternative ways to boost the well-known gene SIRT1, which comes with benefits for both metabolism and longevity. One way to do that is to target SIRT1 directly, as the red wine ingredient resveratrol appears to do, at least at some doses.

Video: How Nicotinamide adenine dinucleotide (NAD+) Works in A Cell

Auwerx's team suspected there might be a simpler way to go about it, by boosting levels of one of SIRT1's molecular sidekicks, the cofactor NAD+.

This milk ingredient does just that in a rather appealing way. Not only is it a natural product, but it also gets trapped within cells, where it can do its magic.

Mice that take nicotinamide riboside in fairly high doses along with their high-fat meals burn more fat and are protected from obesity. They also become better runners thanks to muscles that have greater endurance.

The benefits they observe in mice wouldn't be easy to get from drinking milk alone, Auwerx says. It may be more likely that the compound would serve as a new kind of metabolism-boosting supplement. Tests done in people are now needed to help sort out those details.

On the other hand, he says, this milk substance ultimately offers the same benefits attributed to resveratrol, but in a different way. It's possible that many small effects of ingredients found in our diets could add up to slimmer waistlines—perhaps longer lives, too.


Cell Press
Cell Metabolism
École Polytechnique Fédérale de Lausanne
Milk and It's Effect on Brain Development and Performance
Findings Show Breastfeeding Beneficial to Infant's Immune System, Intestinal Stability, and Healthy Gut
Vitamin D Deficiency Linked To High Mortality Rates in Nursing Home Residents
New Research on Resveratrol Enhances Claim That The Compound Prolongs Lifespan and Healthspan
Intermittent Hypoxic Training May Be Beneficial To Patients with Diabetes
Eating Schedule and Biological Clock Important Factor In Obesity
Eating Eggs Are Healthy and Beneficial To HDL Metabolic Syndrome and Satiety