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Some scientists think that taking omega-3 supplements might hurt memory or thinking in older people because these fats can break down in a way that damages the energy supply in brain cells.
People who later took omega-3 supplements weren’t already declining faster before they started — so the supplements themselves might be linked to the faster decline, not just a sign of early brain...
Taking omega-3 supplements doesn't seem to change the brain changes usually seen in Alzheimer's disease, like plaque buildup or brain shrinkage, in older people over five years.
Taking omega-3 supplements might be linked to a faster drop in brain energy use in areas affected by Alzheimer’s, and this could explain up to 40% of why some older adults’ memories and thinking...
For older people with early memory problems, taking omega-3 supplements might make their memory and thinking skills get worse faster over five years, which is the opposite of what most people think.
Certain types of sunlight, specifically a narrow band of UV light between 340 and 370 nanometers, can trigger a helpful chemical reaction in your skin that releases nitric oxide — which might one day...
Sunlight’s UV-A rays cause far less damage to skin DNA than UV-B rays — so if you could block only the harmful UV-B while letting UV-A through, you might get the benefits of sunlight without the...
When your skin is exposed to sunlight, the tiny cells near your blood vessels release a chemical that helps your blood vessels widen, just like the skin cells do—this might be why your skin turns red...
When your skin is exposed to sunlight, nitrite in your skin—not nitrate—turns into a helpful molecule called nitric oxide that may improve blood flow. Scientists found this happens best when the...
Sunlight’s UV-A rays might help your blood vessels relax by turning a substance in your skin called nitrite into nitric oxide, even without your body using its usual method—this could be why you feel...
When it's hotter or colder outside on the day someone gives a blood sample, their body's IGF-1 and IGFBP-3 levels tend to change in predictable ways — suggesting that the weather might be one reason...
For healthy Korean men between 19 and 40, one standard range works for IGFBP-3 blood levels, but IGF-1 levels change as you get older, so you need different ranges for different ages.
As young Korean men get older—from their late teens to their 40s—their IGF-1 hormone levels go down steadily, but another related hormone, IGFBP-3, stays about the same.
In young Korean men, a protein in the blood called IGFBP-3 goes up in the fall and drops in the winter, and it seems to rise when it’s warmer outside — which is the opposite of how another related...
In young Korean men, the level of a growth-related hormone in the blood tends to be higher during winter and spring than in autumn, and this might be linked to changes in the weather.
When mice get too much sun, certain harmful molecules in their skin cause redness, weaken their immune response, and can lead to skin cancer. Blocking these molecules helps sunscreens work better...
In mice, certain chemicals that block harmful oxygen molecules can stop sunburn-like immune suppression caused by UV light—but if you mix those chemicals with sunscreen, they stop working as well,...
When mice are exposed to sunlight-like UV rays, adding two special chemicals to sunscreen barely boosts its ability to block UV light—from SPF 5 to 5.5—but even though the sunscreen doesn’t get much...
In mice, certain antioxidants reduce skin swelling after sun exposure, which means free radicals cause inflammation—but they don’t help sunblock stop immune suppression, so these two effects happen...
When mice are exposed to sunlight-like UV rays, adding certain chemicals that neutralize harmful free radicals to sunscreen helps stop skin tumors better—without making the sunscreen block more UV...
Doctors can use a quick blood test at the sideline to see if soccer players are under stress or have inflammation, just by checking a protein called CRP.
Scientists think that adjusting what counts as a 'normal' CRP level for each soccer player might help coaches spot when a player needs rest or medical care — but it won't tell you for sure if they're...
Instead of using the same CRP blood test numbers for everyone, doctors could tailor the normal range for each soccer player based on their own body patterns — this might help catch when they're...
Sunlight can create harmful molecules in your skin, but your body naturally produces nitric oxide to balance them out—this balance keeps your skin healthy.