Alzheimer


Delicious sources of antioxidants for healthy summer eating

Forget the hype about single antioxidants, like vitamin E or beta carotene. They’ve never lived up to the promise that they can halt heart disease, cure cancer, eradicate eye disease, or prevent Alzheimer’s.

But that doesn’t mean antioxidants aren’t important to your health. The notion that antioxidants are good for you comes from studies showing that people who eat foods rich in a variety of antioxidants have better long-term health. Trials of single supplements, usually taken in pill form, have yielded disappointing results.

Antioxidants stabilize harmful by-products of the body’s energy-making machinery. These by-products, known as free radicals, can damage DNA, make LDL (“bad”) cholesterol even worse, and wreak havoc elsewhere in the body.

It’s possible that single antioxidants haven’t panned out because it takes a network of antioxidants — like those that exist in foods — to neutralize free radicals. If that’s the case, then it would be helpful to know the antioxidant content of various foods.

An international team of researchers did just that for more than a thousand foods that Americans commonly eat. Topping the list for antioxidant content were blackberries, walnuts, strawberries, artichokes, cranberries, coffee, raspberries, pecans, blueberries, and ground cloves (see “Antioxidant-rich foods”).

Antioxidant-rich foods

Here are the three dozen foods with the highest per-serving content of antioxidants.

Product

Antioxidants (mmol/serving)

Blackberries

5.746

Walnuts

3.721

Strawberries

3.584

Artichokes, prepared

3.559

Cranberries

3.125

Coffee

2.959

Raspberries

2.870

Pecans

2.741

Blueberries

2.680

Cloves, ground

2.637

Grape juice

2.557

Chocolate, baking, unsweetened

2.516

Cranberry juice

2.474

Cherries, sour

2.205

Wine, red

2.199

Power Bar, chocolate flavor

1.875

Pineapple juice

1.859

Guava nectar

1.858

Juice drinks, 10% juice, blueberry or strawberry flavor, vitamin C enriched

1.821

Cranapple juice

1.790

Prunes

1.715

Chocolate, dark, sugar-free

1.675

Cabbage, red, cooked

1.614

Orange juice

1.510

Apple juice, with added vitamin C

1.462

Mango nectar

1.281

Pineapples

1.276

Oranges

1.261

Bran Flakes breakfast cereal

1.244

Plums, black

1.205

Pinto beans, dried

1.137

Canned chili with meat and beans

1.049

Canned chili with meat, no beans

1.045

Spinach, frozen

1.040

Whole Grain Total breakfast cereal

1.024

Chocolate, sugar-free

1.001

Source: American Journal of Clinical Nutrition, July 2006

Cooking appears to increase the antioxidant potential of most foods, with the exception of grains such as rice, pasta, and corn grits, which show lower levels after cooking.

The researchers were careful not to claim that eating foods at the top of the list will keep you healthy. Instead, they believe that rating the antioxidant potential of different foods could help test whether antioxidants really do prevent disease. In the meantime, the list toppers are healthy foods, so don’t hesitate to dig in.

For more information on antioxidant-rich foods, order our Special Health Report, The Benefits and Risks of Vitamins and Minerals, at www.health.harvard.edu/VM.

Alcohol shrinks my brain while tea improves my memory

Everyone knows that heavy drinking is bad for health but I guessed not many knows that Drinking heavy amounts of alcohol over a long period of time may decrease brain volume“. This is according to the latest research that was presented to the American Academy of Neurology”.

What is heavy amount of alcohol ? According to the study, it means more than 14 drinks per week.

Luckily, other research have suggested that tea especially green tea could boost the memory of everyday drinkers.

Reseachers have being conducting tests to see if it can helps the estimated 10 millions suffers of Alzheimer’s disease.  As we know, Alzheimer’s disease is a progressive brain disorder that gradually destroys a person’s memory and ability to learn, reason, make judgments, communicate and carry out daily activities. As Alzheimer’s progresses, individuals may also experience changes in personality and behavior, such as anxiety, suspiciousness or agitation, as well as delusions or hallucinations.

Although there is no cure for Alzheimer’s, the research indicated that “green and black tea inhibited the activity of enzymes associated with the development of Alzheimer’s Disease, but coffee had no significant effect.

Both teas inhibited the activity of the enzyme acetylcholinesterase (AChE), which breaks down the chemical messenger or neurotransmitter, acetylcholine. Alzheimer’s is characterised by a drop in acetylcholine.Green tea and black tea also hinder the activity of the enzyme butyrylcholinesterase (BuChE), which has been discovered in protein deposits which are found on the brain of patients with Alzheimer’s.

Green tea went one step further in that it obstructed the activity of beta-secretase, which plays a role in the production of protein deposits in the brain which are associated with Alzheimer’s disease. Scientists also found that it continued to have its inhibitive effect for a week, whereas black tea’s enzyme-inhibiting properties lasted for only one day. ”

Latest study also found “Green Tea Extract Protects Against Brain Damage In New Mouse Model Of HIV-related Dementia