Practical and up-to-date nutrition information by a certified nutritionist.The premier source for the science of food and nutrition.
Wednesday, February 29, 2012
Nutrition For Autism
People and children with Autism have special dietary needs, and many have various food sensitivities. New studies show that gluten (wheat protein) and casein (milk protein) bind to opioid-receptors in the brain, and can have a potent effect on behavior (like heroin or morphine), causing problems including sleepiness, giddiness, inattention/”zoning out”, and aggressive and self-abusive behavior. Like opioids, they can be highly addictive, and a lack of them can cause severe behaviors. Tests are available to show food sensitivities. If you are considering a Gluten Free, Casein Free diet, talk with your health-care team, including a registered dietitian. There can be side effects and potential nutrient shortfalls when a GFCG diet is self-prescribed.
Several studies have demonstrated that children with autism have substantial oxidative stress, suggesting either a low level of key antioxidants or an increased need for them.
There are over 20 studies of vitamin B6 with Magnesium for autism, including 12 double-blind, placebo-controlled studies, making it one of most studied treatments for autism. Almost all of these studies found that 45-50% of children and adults with autism benefited from high-dose supplementation of vitamin B6 with magnesium. Vitamin B6 is required for over 100 enzymatic reactions, including the production of major neurotransmitters (serotonin, dopamine, and others) and glutathione (needed for detoxification). Magnesium is used to prevent the possibility of hyperactivity, which can occur if the vitamin B6 is taken by itself. Studies show that Vit. C also has positive effects, as it helps with protein metabolism, and sufficient levels of iron should be monitored as well. Low levels of essential fatty acids are associated with a wide range of psychological disorders, including depression, post-partum depression, bipolar (manic/depression) and Rett’s syndrome (similar to autism). Most importantly, two published studies have found that children with autism have lower levels of omega –3 fatty acids than the general population.
Supplementation may be necessary, as typical Autism behavior can affect eating habits and food choices. It is still best to encourage healthy, vitamin-rich foods to ensure the proper balance of nutrients. Only a customized diet plan with your health care provider should be considered. Medical Nutrition Therapy for the treatment of any illness or disorder is regulated by law and limited to professional nutrition practices. To find a Registered Dietitian in your area, go to Find a Dietitian
~Mayo Clinic, 2011
~eatright.org
Sunday, February 12, 2012
Allergy or Intolerance?
Food allergies occur when your body's immune system over reacts to a substance in a food, usually a protein, your body sees as harmful. This sets off a chain reaction within your body. Symptoms can occur within minutes and are generally seen on the skin (hives, itchiness, swelling of the skin). Gastrointestinal symptoms may include vomiting and diarrhea. Respiratory symptoms may accompany skin and gastrointestinal symptoms, but don't usually occur alone. They can be mild–such as a runny nose or itchy eyes to severe and even life-threatening. Most food allergies develop early in life, and many are outgrown.
Anaphylaxis (an-a-fi-LAK-sis) is a serious allergic reaction that happens very quickly. Without immediate treatment – an injection of epinephrine (adrenaline) and expert care – anaphylaxis can be fatal. Symptoms of anaphylaxis may include difficulty breathing, dizziness or loss of consciousness. If you have any of these symptoms, particularly after eating, seek medical care immediately (call 911). Don't wait to see if your symptoms go away or get better on their own.
A food intolerance is not the same as a food allergy. An intolerance occurs when your body is unable to digest a certain component of a food, such as lactose, a sugar found in milk; monosodium glutamate; or sulfites, a preservative. Though symptoms of intolerance may be unpleasant, including abdominal cramping or diarrhea, they are not life-threatening.
To help you avoid allergens, the Food and Drug Administration has mandated food companies specify on product labels if any of the eight major allergens is contained in the food. Manufacturers can change ingredients of products without notice, so double-check ingredient labels every time you buy a food, even a familiar one. Cosmetics and beauty products also may contain common allergens such as milk, egg, wheat and tree nuts.
A dietitian can help you understand which foods are safe to eat and how best to avoid items that may cause a reaction. When foods are cut from your diet, you may be short-changing yourself on important vitamins and minerals. Ask your healthcare provider for a referral.
~ Academy of Nutrition and Dietetics, 2012
Sunday, January 15, 2012
Lactose Intolerance: Marketing Hype or Ligitimate Disorder?
It is a rare case that a person is born with such a deficiency and pretty limited to certain ethnic groups. More often, lactose intolerance is the result of damaged intestinal lining, either through radiation therapy, malnutrition, diarrhea, toxins (including food poisoning), antibiotics, or by the naturally diminishing lactase activity that comes with the aging process. In many cases, it is a temporary condition.
Many people believe they are lactose intolerant when they are not, thanks to vigorous advertising campaigns that promote products for lactose intolerance. Lactose is found in many foods besides dairy products, so if you are truly lactose intolerant, you would also have the same symptoms from eating certain breads, cereals, salad dressings, cake mixes, or anything containing whey protein and casein.
Yet, even some people with true lactose intolerance are able to consume dairy products. The bacteria in the large intestine can digest lactose in small, regular doses. The metabolic capacity for lactose can develop as the micro flora adapt to digesting it. A few simple tricks can alleviate the discomfort:
- Consume lactose (dairy) with other foods to slow down the transit of the sugar through the intestines, giving it more time to break down.
- Eat dairy foods regularly so that the intestinal micro flora remain adapted to digesting lactose.
- Limit lactose products to no more than 8 oz. at a time.
- Yogurt has about 10 G. of lactose per cup, but the bacteria help digest it. A serving of hard cheese has less than one gram, while cottage cheese and ice cream contains 4-5 G. Fermented cheeses are usually better tolerated.
- Lactase enzyme preparations can be added to dairy products, and fermented milk (contains acidophilus) are helpful, especially for temporary symptoms resulting from an illness. Acidophilus is a digestive bacteria that breaks down milk sugar, and is used in the fermenting process of dairy products, as in yogurt and cheese.
~Normal and Clinical Nutrition, 6th ed. Whitney, Cataldo, Rolfes
Thursday, January 5, 2012
Aspartame Myths Debunked
Aspartame is one of the most studied of all food additives. It is a simple compound made of components common to many foods: the amino acids phenylalanine and aspartic acid, with a methyl group. The combination creates a product with 200 times the sweetness of table sugar (sucrose & fructose). When digested, enzymes break apart the 3 components. The amino acids are used as proteins, just as any other food proteins. The methyl group converts to methanol, and oxidizes into carbon dioxide. Simple tomato juice yeilds 6 times the amount of methanol as a diet soda.
People with the inherited disease phenylketonuria, or PKU, are unable to metabolize and dispose of phenylalanine. The accumulation of phenylalanine and it's by-products is toxic, therefore a specialized low protein diet is the treatment, and aspartame must be avoided. For this reason, all newborns in the U.S. are screened for the disease.
Aside from the special case of PKU, aspartame is safe.
~American Dietetic Association
~Tuft's University
Sunday, January 1, 2012
Edamame, Close Up
As with all beans and lentils, they are excellent for the diabetic diet since they digest slowly, which provides a gentle rise in blood sugar. Diabetics who eat a substantial amount of legumes require less insulin to control their blood sugar.