Browse evidence-based analysis of health-related claims and assertions
Log in to see full claim details, scientific mechanisms, and cited studies.
Your thoughts and emotions can directly affect your body’s internal systems like your hormones and immune response, and those systems can also influence how you feel mentally.
When people are under long-term stress or feel anxious all the time, it can mess up their thyroid gland's normal function and make thyroid autoimmune diseases like Hashimoto's worse.
Some people with Graves disease, an autoimmune condition that makes the thyroid overproduce hormones, can suddenly stop needing medication because their thyroid starts working normally again—even...
When your immune system attacks your thyroid, it can permanently damage your hair follicles, causing your hair to thin out—even after your thyroid condition gets better.
People with autoimmune thyroid disease can often tell when their condition is flaring up based on how they feel, even before blood tests show it.
When your body releases a lot of adrenaline due to stress or other triggers, it might cause your thyroid to flare up—even if you don't feel stressed at all.
Graves disease is when the body keeps making harmful antibodies that attack the thyroid, even when the person feels better and doesn't have symptoms anymore.
Cutting back on carbs and cutting out sugary foods may help people with autoimmune thyroid disease feel better by stabilizing their metabolism and lowering body-wide inflammation.
When you're under long-term stress or feel anxious all the time, it can mess with your thyroid gland's normal function and make autoimmune thyroid problems like Hashimoto's worse.
Some people with Graves disease, an autoimmune condition that makes the thyroid produce too much hormone, can get better on their own without taking medication—their hormone levels return to normal...
In mice, vitamin D doesn’t turn on a key germ-fighting gene the way it does in humans—so even when the vitamin D signal is present or missing, the gene stays quiet. This means mice and humans respond...
Humans and other primates have a special genetic switch that lets vitamin D boost their immune system, but mice, rats, and dogs don’t have this switch—so vitamin D works differently in them.
Vitamin D activates a gene in certain human immune cells that helps fight off germs, and this happens because vitamin D directly attaches to a specific spot on the gene to turn it on.
Eating too much added sugar might mess with the good bacteria in your gut that help process bile acids, which could lead to changes that make your body less able to handle sugar, raising your risk...
Whether sugar makes certain good gut bacteria grow or shrink depends on your genes—specifically, a gene called Fut2 that affects the mucus in your gut. So, sugar might help bacteria in some people...
Eating too much added sugar can irritate your gut, making it more oxygen-rich, which helps bad bacteria thrive and hurts the good ones—this imbalance might contribute to metabolic problems like...
Eating too much added sugar might kill off the good bacteria in your gut that make helpful chemicals, which could weaken your gut lining and cause body-wide inflammation.
Drinking sugary sodas might change your gut bacteria more than eating the same amount of sugar in candy or cookies, because the liquid sugar goes through your stomach faster and reaches your...
Eating a lot of added sugar, especially in sodas and sweet drinks, might change the good bacteria in your gut, letting some bacteria that love sugar grow too much while reducing others that help keep...
Giving thyroid hormone makes the same increase in certain heart receptors in both young and old rats, but that change doesn’t explain why older rats’ hearts don’t respond the same way to adrenaline...
As rats get older, their hearts don't respond as well to a hormone that makes the heart beat faster, but giving them a thyroid hormone helps a little bit — showing that aging and thyroid function...
In older rats, giving them a thyroid hormone helps their blood vessels respond better to a chemical that normally makes them relax — but only partly. This suggests that as rats age, their thyroid...
Even though baboons with too much thyroid hormone have more heart receptors that respond to adrenaline, their hearts don’t beat stronger or relax faster when given drugs that stimulate those...
When baboons are given thyroid hormone, their bodies develop many more of a certain type of receptor that helps respond to stress and energy signals—especially the beta-2 kind—making them much more...