Spicy-food lovers take note: The same process that leads to beads of sweat forming when biting into a chili pepper may actually increase energy expenditure, if the findings from a preliminary (and small) study hold up.
Researchers from University of California, Los Angeles’ Center for Human Nutrition presented their findings at the ongoing Experimental Biology conference.
The stuff that gives chili peppers that searing heat-inducing zing is called capsaicin. (It sets off the pain receptors on our tongue.) In the lab, capsaicin has shown cancer preventive properties; you can read about the research here, and find out how to squash that burning sensation if it’s too hot.
The UCLA scientists studied the non-burning version of capsaicin, called DCT for short. Thirty-four participants drank a low-calorie liquid meal replacement for 28 days. The participants were divided into groups: one group took a DCT supplement after the meal – either a low or high dose – another group took a placebo.
Researchers determined energy expenditure (heat production) in each subject after he or she consumed one serving of the test meal. They found that at least for several hours after the test meal was eaten, energy expenditure was significantly increased in the group consuming the highest amount of DCT. The energy expended was almost double that of the placebo group, suggesting it may help dieters by increasing metabolism.
There are plenty of caveats to this study – e.g, it’s small, limited to a single meal – but it does buoy the evidence, once again, that there is a lot of hidden health benefits inside plant foods. That supports AICR’s recommendation to eat plenty of a variety of fruits and vegetables: it will add flavor, healthful compounds, and maybe even help with weight loss.
Do you love chili peppers, hate them, or a little of both? Have a good chili pepper story?
The reasons to make physical activity part of a daily routine just keep building. For one thing: there’s the evidence linking physical activity to reduced cancer risk. The latest incentive to get active comes from a new study that found exercise speeds learning and improves blood flow to the brain in monkeys.
Previous studies have linked improved learning to exercise in rodents; but this study examines this link in monkeys. The study is published in the journal Neuroscience; you can read the release here.
In the study, one group of monkeys was aerobically active – running on a treadmill for an hour each day, five days per week, for five months. Another group simply sat on the treadmill for the same amount of time.
Cognitive tests found that the exercising monkeys learned one task twice as quickly as the sedentary animals.
When it comes to exercise and cancer prevention, the link between physical activity and reducing cancer risk is clear. Regular activity acts with weight control – and excess body fat causes several different cancers – and also appears to have biological effects that lower cancer risk, such as strengthening the immune system.
Want to see if you are active enough? Take our quiz.
If you already incorporate physical activity into your day, how did you get into the habit? Any tips?
An intriguing new Swedish study linking heavier girls to decreased breast cancer risk highlights just how complicated the link is between body fat and cancer.
AICR’s expert report, along with other major reviews, have found clear evidence that excess body fat causes many different cancers, including post-menopausal cancer. And research shows that heavier children are more likely to become overweight adults.
But when it comes to cancer risk, studies are increasingly showing that there are “windows of susceptibility” – various periods during a person’s lifetime when diet, body fat, and physical activity exert a stronger than usual effect upon our risk of getting cancer.
These “windows” are one reason that the effects of lifestyle at an early age matter.
In this study, the researchers focused on girls at age seven. They showed about 6,000 adult women nine pictures of girls, ranging from skinny to obese body types. The women chose the picture that best resembled them when they were seven years old. About half of the women in the study had post-menopausal breast cancer.
The women who said they were bigger when younger were less likely to develop the disease overall, and also less likely to develop ER negative’ breast tumors, a form more difficult to treat. Even when the authors took into account other risk factors, such as adult BMI and estrogen exposure, the decreased risk held.
The study is published in the journal Breast Cancer; you can read it here.