Category Archives: Featured Articles

January 26th, 2015

Vision Quest

Five key nutrients for preventing and treating cataracts and macular degeneration

Nutritional factors play a key role in the prevention and treatment of cataracts and macular degeneration. A diet high in richly colored fruits and vegetables—as well as targeted supplements—is associated with a lowered risk for both conditions.

Lutein and Zeaxanthin

Research shows that lutein and zeaxanthin supplements not only help protect against macular degeneration, but can also improve visual function in people with macular degeneration. Specifically, in patients with macular degeneration, 10–15 mg of lutein daily led to improvements, including glare recovery, contrast sensitivity, and visual acuity, as compared to a placebo group.

Lutein is also important in preventing cataracts and improving visual function in people with existing cataracts. Like the macula, the human lens concentrates lutein and zeaxanthin. In fact, these are the only carotenes found in the human lens. Three large studies have shown that the intake of lutein was inversely associated with cataract surgery.

Flavonoid-Rich Extracts

Flavonoid-rich extracts of blueberry, bilberry, pine bark, or grape seed also offer valuable eye-health benefits. In addition to possessing excellent antioxidant activity, these extracts have been shown to improve blood flow to the retina and enhance visual processes, especially poor night vision. Take 150–300 mg daily of one of these extracts to support eye health.

Nutritional Antioxidants

Nutritional antioxidants—such as beta-carotene, vitamins C and E, zinc, copper, and selenium—are extremely important for eye health. Studies conducted by the Age-Related Eye Disease Study Research Group confirm that a combination of these nutrients produces better results than any single one alone. But even something as simple as taking vitamin C or zinc can produce dramatic effects. In one study, women who took vitamin C for more than 10 years had a 77 percent lower rate of cataract formation compared to women who did not take the vitamin.

Zinc plays an essential role in the metabolism of the retina and the visual process. A two-year trial involving 151 subjects showed that the group taking zinc had significantly less visual loss than the placebo group.

CoQ10 and Acetyl-L-Carnitine

In one double-blind study, 200 mg of acetyl-L-carnitine, omega-3 fatty acids (460 mg EPA and 320 mg DHA), and 20 mg of CoQ10 was shown to improve visual function and macular alterations in early-stage macular degeneration. This combination stopped the disease from progressing in 47 out of 48 cases.

Fish Oils

There is a strong relationship between atherosclerosis (known as hardening of the arteries) and eye health. Therefore, just as in atherosclerosis, omega-3 fatty acids from fish oils play an important role in preventing macular degeneration and other eye conditions. The recommended dosage is 1,000 mg of EPA and DHA.

Nutrition for Your Eyes

Foods rich in the carotenes lycopene, zeaxanthin, and lutein include bell peppers, carrots, collard greens, kale, papaya, spinach, sweet potatoes, and tomatoes.


January 25th, 2015

The Collagen Connection

This unheralded protein plays a key role in keeping us together—literally

The most abundant protein in the human body, collagen is also the main component of connective tissue such as tendons, ligaments, cartilage, bone, and blood vessels.

As we age, the collagen-rich support structure of the skin (known as the dermis) changes. The activity of fibroblasts—cells responsible for making collagen—slows down, which leads to changes that make skin look old.

The collagen production in our joints also slows with age, which may lead to osteoarthritis. And decreased collagen in bone is a key factor in osteoporosis. The amount of collagen determines the number of “bone mineral binding sites.” If the collagen content is low, bone becomes more brittle and fracture risk increases dramatically.

Increasing Collagen

To fight the problem of declining collagen levels, we need to increase the activity of collagen-producing cells. One of the best ways to do this is the use of a special from of silica—choline stabilized orthosilicic acid (ChOSA). In one study, women with signs of aging skin who received 10 mg of ChOSA daily saw a 30 percent improvement in fine lines, 55 percent increased skin elasticity, and a reduction in brittle nails and hair.

ChOSA has also shown benefits in promoting bone health. In a detailed double-blind study of postmenopausal women with low bone density, ChOSA was able to increase the collagen content of the bone by 22 percent and increase bone density by 2 percent. The typical dosage is 6–10 mg per day.

Flavonoids are Critical

Flavonoids are plant pigments that support healthy collagen levels. Especially beneficial are the blue or purple pigments—anthocyanidins and PCOs (short for proanthocyanidin oligomers)—found in grapes, blueberries, and pine bark and grape seed extracts. Among their benefits:

  • They have the ability to crosslink collagen fibers, reinforcing the natural crosslinking that forms the collagen matrix of connective tissue.
  • They inhibit destruction of collagen structures by enzymes secreted by white blood cells during inflammation.

To take advantage of these flavonoids, increase your intake of richly colored berries and other fruits. And supplement with a PCO-rich extract such as grape seed or pine bark (50– 150 mg per day) for general support.


January 24th, 2015

How to Eliminate Food Cravings

Despite what you may have heard, overcoming food cravings has nothing to do with willpower

Oxygen, food, and water are the three main things we need to stay alive. If we’re deprived of any of them for a significant period (not very long, when it comes to oxygen), the body and brain have powerful mechanisms that move us to breathe, eat, or drink. In the case of food, the brain is particularly sensitive to sudden drops in blood sugar and releases a number of chemicals that drive us to crave sugars and sweets to raise blood sugar levels. Our intestinal tract and fat cells also secrete hormones that tell us it’s time to eat.

Appetite in Overdrive?

People without weight problems benefit from a fully functioning system of appetite control—compounds such as hormones, peptides, neurotransmitters, and glucose that circulate in the blood and are sensed and acted upon by the brain. People of normal weight don’t usually experience frequent cravings for unhealthy foods. They simply feel hungry at appropriate times. They are also inclined to feel satisfied when they eat modest sized portions that don’t promote weight gain.

Unfortunately, when abdominal fat cells are enlarged in overweight and obese individuals, this complex system of appetite control becomes altered. The key factor that leads to this disruption is insulin resistance.

Resetting Appetite Control

Resistance to the hormone insulin sets the stage for intense food cravings. In more primitive times, insulin resistance filled the purpose of helping humans pack on the pounds when food was abundant so that they could survive during famine. Today, we don’t usually have that problem, and as a result our physiology is stuck in the fat-storing mode with an overactive appetite.

If you want to lose weight and keep it off, you have to fix your appetite control system and free yourself from excessive food cravings. Two powerful natural approaches to doing this are stabilizing blood sugar and boosting serotonin levels in your brain.

Stabilizing Blood Sugar

The first step to eliminating food cravings is to treat the cause—in most cases, blood sugar volatility due to insulin resistance. Using breakthrough technology, Michael Lyon, MD, and
I discovered that maintaining blood sugar levels within a very narrow range is the real key to controlling
an overactive appetite. When people are on what we call the “blood sugar roller coaster,” they have very little control over their appetite or portion sizes. This is because every time they experience a quick drop in blood
sugar levels, the brain goes into panic mode and secretes powerful appetite stimulators, as well as hormones such as cortisol and adrenaline, to boost blood sugar.

Much of the effect of blood sugar fluctuations on appetite control can be traced to specialized brain cells called glial cells that surround every brain cell. Glial cells are important in sensing the level of glucose in the blood. Every time blood sugar drops rapidly, glial cells send powerful signals to brain regions, such as the hypothalamus, which then stimulate food cravings. Because of insulin resistance and its accompanying poor glucose regulation, overweight people often experience near constant commands to eat.

So, how do you improve blood sugar control and insulin resistance? Here are seven keys:

  1. Eat a low-glycemic-load diet. One to try: The Blood Sugar Solution by Mark Hyman, MD.
  2. Try a viscous fiber supplement (the super fiber PGX has the most data behind it; take 2.5–5 grams before meals).
  3. Supplement with chromium, which is necessary for insulin to work properly, at a dosage of 200–400 mcg per day.
  4. Get a handle on stress.
  5. Ensure that you never really get hungry by consuming low-calorie snacks, such as fresh vegetables and fruit, between meals.
  6. Engage in physical exercise for at least 30 minutes every day.
  7. Plan your daily menu in advance.

5-HTP and Saffron

Low levels of the brain chemical serotonin are another factor involved in food cravings. The manufacture of serotonin begins with the amino acid tryptophan. Insulin resistance or excess cortisol creates a block in the conversion of tryptophan to 5-Hydroxytryptophan (5-HTP)—the intermediate step between tryptophan and serotonin. Fortunately, several studies have shown that taking 5-HTP supplements can reduce cravings and carb intake, leading to significant weight loss.

A new alternative to 5-HTP is Satiereal, an extract of saffron that shows similar effects in reducing food cravings and boosting serotonin levels. For 5-HTP, the usual dosage is 50–100 mg three times daily. For Satiereal, the dosage is 15 mg twice daily.