Discover the Science of Health
With warmer days ahead, children will start flocking to the outdoors for fresh air and sunshine. However, according to a new study in the journal Pediatrics, only 25% of them will be appropriately shielded from the sun’s harmful ultraviolet rays [1]. This is down from 50% of children who reported using sunscreen “often or always” in 2004.
Image credit: Skin care on the back via ShutterstockIt seems to be a fact of life that memory performance decreases as we age, but new research helps to understand what precisely is decreasing, why and points towards strategies that might help. A study published in the journal Memory suggests that older adults perform less well on working memory tasks as they do not forget information that is no longer relevant [1]. This might sound like a good thing, but it leads to overload of memory processes, damaging memory performance.
Images in the mind image via ShutterstockIt’s not you. You’re not imagining it. It really, actually, legitimately is harder to keep weight off than it is to lose it in the first place. You really do feel hungrier than you used to, and still the pounds keep creeping back on. This is the conclusion that Dr. Joseph Proietto and his colleagues at the University of Melbourne just published in the New England Journal of Medicine [1].
Lose weight image via ShutterstockIt’s obvious that obese people more have fat than non-obese people, but it’s not as clear how it happens. Do obese individuals have more adipocytes (fat cells) than lean people, or do they have the same number of adipocytes, just larger ones? It turns out to be both. But the way that comes to pass is just being worked out by scientists. Engineering Professor Dr. Amit Gefen and his colleagues at Tel Aviv University recently demonstrated in a mouse cell line model that preadipocytes (precursors to fat cells) subjected to prolonged periods of “mechanical stretching loads” — the kind of weight we put on our body tissues when we sit or lie down — differentiate significantly faster, and retain significantly larger fat droplets, than those that are not. The research was published in the American Journal of Physiology — Cell Physiology [1].
Perhaps among the most confusing of nutrition and wellness decisions that the average consumer must make is whether to take dietary supplements. The available information is deeply contradictory; while some supplements — like folic acid for pregnant women and vitamin D for babies — are considered nearly essential in medical care, research suggests that other supplements may be ineffective or even deleterious to health. A recent research summary published in The Medical Letter On Drugs and Therapeutics may help consumers and practitioners to wade through the conflicting information on supplements, as many supplements have both risks and benefits associated with their use [1].
