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Giving thyroid hormone to baboons for four weeks makes their hearts pump more strongly and relax faster while at rest, without changing their heart rate — like giving the heart a boost in efficiency.
When rats have an overactive thyroid, their hearts have more receptors that respond to stress hormones, which might make their hearts beat harder and faster when those hormones are present.
Even when rats have too much thyroid hormone, their heart receptors still respond to certain chemicals the same way as normal rats—so the sensitivity of those receptors doesn’t change, even if there...
When rats are given thyroid hormones, their heart cells develop about twice as many spots where adrenaline-like chemicals can attach, but the spots don’t change how tightly they hold onto those...
Scientists found tiny amounts of mercury in cells of the thyroid gland, but they didn't check if people with this mercury had thyroid problems — so we can't say mercury causes thyroid disease.
People whose thyroid cells have mercury in them tend to be older—around 71 years on average—while those without mercury in their thyroid cells are younger, around 50 years old. This doesn’t mean...
Not everyone has mercury in their thyroid gland, and when it is there, it doesn't show up everywhere—it's scattered in small patches, which might mean the thyroid picks up mercury in a selective way.
Scientists have found traces of toxic metals like mercury, lead, and cadmium in the thyroid cells of older people, and these metals are often found together in the same spots.
About 1 in 5 adults have traces of mercury in their thyroid gland, and the older you are, the more likely you are to find it there — suggesting mercury builds up in the thyroid as people age.
When toxins like mercury or lead build up in the body, they can confuse the immune system into thinking the thyroid is an enemy, causing it to attack the thyroid by mistake.
Most of your body’s immune system—about 70 to 80%—is hanging out in your gut, right where it can meet and talk to the trillions of bacteria living there.
Lemon balm, a common herb, may help calm an overactive thyroid by blocking key steps that make too much thyroid hormone — like turning down a faucet that's running too fast.
When your body has too much thyroid hormone, it makes your heart beat faster and makes you sweat more—even when you're not exercising or stressed out.
When your body is already working overtime due to too much thyroid hormone, doing intense cardio can push your stress response even further, making your heart race more and releasing more stress...
When your body uses vitamin D properly, it helps seal your gut lining and activates natural defenses that calm down overactive immune responses, which might prevent autoimmune diseases.
If you cut out starchy foods and sugary snacks for a long time, the good bacteria in your gut have less to feed on, which may lead to less harmful toxins and less body-wide inflammation that's linked...
Cutting out sugary foods and carbs may help reduce bad yeast and bacteria in your gut, which can calm down inflammation and make your immune system less overactive.
When the gut lining gets damaged, foreign particles from food and bacteria can leak into the body and trick the immune system into attacking the body's own tissues, like it's fighting an invader.
When the lining of your gut becomes too leaky, it lets bacteria and food particles escape into your bloodstream, which can confuse your immune system and cause it to attack your own body.
When young men eat eggs as recommended, it’s not just the good proteins that matter—it’s the total amount of nitrogen they get from all the protein that determines if their body keeps or loses muscle.
The recommended amount of egg protein from 1973 might not be enough to keep young men’s bodies in balance if they’re eating a lot of calories — their bodies might need extra protein from other...
If you're a young man eating a moderate amount of egg protein, adding some extra nonessential amino acids lets your body stay balanced with less food energy—suggesting that all amino acids together,...
Sperm that don't swim well have stiffer outer membranes than sperm that swim well, and this stiffness doesn't go away even when the sperm are supposed to become ready for fertilization.
Too much cholesterol in sperm makes it harder for them to get ready to fertilize an egg, because it stops key changes they normally need to make.