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New in Nutrition Treatments (page 21 of 22)
The findings from a new study suggest another reason why diets that contain low glycemic loads may be of benefit. Not only can they improve insulin sensitivity, this type of diet also appears to clear up acne as well.
Data from earlier studies suggest that dietary factors such as the glycemic load are involved in the pathogenesis of acne. Therefore, changes in diet could impact symptoms of this common skin disease, the researches hypothesize.
Foods that produce a high glycemic load—or high levels of blood glucose—such as white bread and potatoes tend to cause a rapid surge in blood sugar. Conversely, other carbs, such as high-fiber cereals or beans, create a more gradual change and are considered to have a low glycemic index.
Dr. Robyn N. Smith, from the RMIT University in Melbourne, Australia, and colleagues assessed acne symptoms in 43 male patients, between 15 and 25 years, who were randomly assigned to a low glycemic load diet or a normal diet for 12 weeks. The intervention diet consisted of 25% energy from protein and 45% from low-glycemic-index carbohydrates.
The findings are published in the July issue of the American Journal of Clinical Nutrition.
The low-glycemic diet was associated with a significant reduce in total acne compared with the normal diet. In addition, the low-glycemic diet produced significantly greater reductions in body weight and body mass and a greater increase in insulin sensitivity. Insulin resistance is a condition in which the body’s cells become insensitive to the effects of insulin, so the body’s response to a normal amount of insulin is reduced. As a result, higher amounts of insulin are needed for this hormone to work in the body.
Smith and her associates point out that this study is the first randomized controlled trial to examine the influence the effects of glycemic load on acne.
“Although we could not isolate the effect of the low glycemic load diet from that of weight loss,” they add, the findings support the hypothesis of a relationship between acne and high insulin levels.
Reuters, July 20, 2007
Scientists have discovered that an extract of broccoli sprouts protects the skin against the sun's harmful ultraviolet rays.
The best way to reap the health benefits of fruits and vegetables without exposing yourself to potentially harmful pesticides is to choose organic produce whenever possible, especially those varieties which are more likely to be contaminated. But if organic produce is cutting into your budget, it's okay to buy non-organic varieties of the fruits and vegetables listed below, which tend to contain the least amount of pesticides. However, make it a habit to wash them thoroughly before eating or cooking, to remove dirt and bacteria.
- Corn (sweet, frozen)
- Peas (sweet, frozen)
Distribution and marketing of BORBA Skin Balance Waters and drinkable skin care line allows beer company to participate in the emerging nutraceutical beverage category; provides expansion opportunity.
By Nancy Jeffries
The link between nutrition and beauty is inspiring a new breed of beauty products. Marketers are recognizing the value of rolling health care and beauty into overall treatment programs supported by eco-friendly products, and both manufacturers and consumers are feeling their way through a transition as conscience and economics converge.
People who unwind with a cup of tea every night may have a lower risk of two common forms of skin cancer, new research suggests.
In a study of nearly 2,200 adults, researchers found that tea drinkers had a lower risk of developing squamous cell or basal cell carcinoma, the two most common forms of skin cancer.
Men and women who had ever been regular tea drinkers -- having one or more cups a day -- were 20 percent to 30 percent less likely to develop the cancers than those who didn't drink tea.
The effect was even stronger among study participants who'd been tea fans for decades, as well as those who regularly had at least two cups a day, according to findings published in the Journal of the American Academy of Dermatology.
However, the findings do not mean it's okay to bake in the sun as long as you have a cup of tea afterward. The researchers found no evidence that tea drinking lowered skin cancer risk in people who'd accumulated painful sunburns in the past.
Nor did the study look at the relationship between tea drinking and malignant melanoma, the least common but most deadly form of skin cancer.
Still, the findings support the theory that tea antioxidants may limit the damage UV radiation inflicts on the skin, according to the study authors, led by Dr. Judy R. Rees of Dartmouth Medical School in Lebanon, New Hampshire.
In particular, a tea antioxidant known as EGCG has been shown to reduce burning on UV-exposed skin.
The current findings are based on interviews with 770 New Hampshire residents with basal cell carcinoma, 696 with squamous cell carcinoma, and 715 cancer-free men and women the same age.
Tea consumption was linked to a lower skin cancer risk, even with factors such as age, skin type and history of severe burns considered. However, tea drinkers who'd suffered multiple painful burns in the past did not have a lower risk of skin cancer.
It's possible, the researchers explain, that the antioxidants in tea are enough to limit skin damage caused by moderate sun exposure, but not the "more extreme" effects of sun exposure, such as cancer-promoting damage to the DNA in skin cells.
SOURCE: Journal of the American Academy of Dermatology, May 2007.
HealthDay News, May 4, 2007
By Cathy Christensen
This jade-colored treat is packed with vitamins, flavor and moisturizing benefits.
Drinking two cups of spearmint tea a day might help treat women with an unsightly condition that causes them to grow excess hair on their face, breasts and stomach, Turkish researchers report.
The tea works by lowering the levels of circulating male hormones in these women, the scientists claim in the current online issue of Phytotherapy Research.
The authors called the findings preliminary.
"There are no recommendations for patients and physicians yet," said Mehmet Numan Tamer, co-author of the study and a professor of endocrinology and metabolism at Suleyman Demirel University in Isparta, Turkey. "This is the first clinical study about the spearmint tea, but further studies are needed to give the practical recommendations to patients."
But other experts feel the findings are far-fetched.
"This is absurd," said Khursheed Navder, an associate professor of nutrition and food science at Hunter College in New York City. "I completely think it is very preliminary, and you need major randomized trials. It's nothing to get thrilled about."
Hirsutism is a condition that can occur in both men and women, but, for obvious reasons, it is more of a cosmetic concern in women. The hair growth is a result of unnaturally high levels of androgens such as testoserone.
According to Tamer, standard therapy includes oral contraceptives to suppress androgens or drugs such as spironolactone, which prevents the body responding to androgens.
Spearmint, which grows naturally near Isparta, has been widely used for indigestion, nausea and vomiting, as well as for the common cold, cough, sinusitis, fever and bronchitis.
"Spearmint has been used as an herb for a long time now," confirmed Navder. "These are all folk remedies."
The Turkish researchers thought that spearmint might be linked with reports of diminished libido in townsmen (presumably because of its effects on androgen levels). In one previous rat study, spearmint reduced testosterone levels.
"Previously, we investigated the effects of [peppermint] and [spearmint] herbal teas on testicular function in an experimental rat model and found that testosterone levels were decreased," Tamer said. "Because we found the anti-androgenic effects of spearmint, we decided to observe the effect of this herbal tea on the androgen levels in hirsute women."
For this study, 21 women with hirsutism drank two cups of herbal spearmint tea for five days at a certain time in their menstrual cycle.
All women showed a decrease in free testosterone (circulating hormone not bound to other molecules) and an increase in several different "female" hormones, including follicle-stimulating hormone and estrogen.
There was no significant decrease in total testosterone levels; it was unclear if there was any change in amount of excess hair growth.
"The next step is to show the effect of spearmint tea on hirsutism scores of the women in a treatment period," Tamer said.
Although the amounts of spearmint used in this study are not generally toxic, the herb can be harmful if taken in larger amounts
By Michelle Kleist, RD
Black tea eases stress by lowering blood levels of the stress hormone cortisol, says a British study in the journal Psychopharmacology.
The six-week study of 75 people found that those who drank black tea were able to de-stress more quickly than those who drank a caffeinated tea substitute, BBC News reported.
The participants were assigned challenging tasks while their cortisol, blood pressure, blood platelet, and self-rated levels of stress were measured by the researchers. During these tasks, both groups of study participants experienced large increases in blood pressure, heart rate, and self-rated levels of stress.
However, 50 minutes after the stressful tasks, cortisol levels dropped by an average of 47 percent among those who drank black tea and 27 percent among those who drank the tea substitute.
The study also found that the tea drinkers had lower blood platelet activation, which is associated with blood clotting and heart-attack risk, BBC News reported.
It's unclear which ingredients in black tea help reduce stress, the University College London researchers said.
HealthDay News, October 6, 2006