Browse evidence-based analysis of health-related claims and assertions
Eating walnuts instead of other fats won't make you gain weight, even though they're high in calories.
Eating walnuts can help lower bad and overall cholesterol levels in people.
Just one Brazil nut a day can boost your body's main antioxidant system and help fight damage from pollution and poor diet, especially if you're overweight.
Eating peanut butter every day can help control blood sugar and make you feel fuller longer, without making you gain weight.
Eating pistachios every day can help control blood sugar and reduce inflammation in people at risk for diabetes, even helping blood vessels work better.
Eating a handful of walnuts every day can help your blood vessels work better and lower your heart disease risk, especially if you have diabetes or are overweight.
Eating a small handful of almonds every day can help lower bad cholesterol and blood sugar in people with diabetes or heart disease, without making them gain weight.
Eating macadamia nuts every day for 8 weeks doesn’t seem to change blood sugar or insulin levels in people who are overweight or obese with belly fat.
Eating macadamia nuts for 15% of your daily calories boosts a healthy fat called palmitoleic acid in your diet and in your blood, showing your body is actually using the good fats from the nuts.
Eating macadamia nuts might help lower cholesterol more in people who are overweight but not obese, especially if they have less body fat, compared to those with more body fat or obesity.
Eating macadamia nuts might slightly lower bad cholesterol in overweight adults, even if they don’t cut back on saturated fat — kind of like other nuts do.
Eating macadamia nuts every day — even if it adds about 97 extra calories — doesn’t make you gain weight or body fat if you're overweight and have belly fat. So, these nuts can be part of your diet without messing up your body shape.
Eating walnuts doesn’t make adults gain weight over several weeks—even though they’re high in calories, studies show no real change in weight or BMI.
Eating walnuts might help your blood vessels work better and reduce inflammation in your body, based on several studies in adults.
Eating walnuts doesn't really change triglyceride levels in adults — even after several weeks, there's no big effect on this type of fat in the blood.
Eating walnuts every day for up to 6 months doesn’t really change your 'good' cholesterol levels — it stays about the same as if you didn’t eat them.
Eating walnuts every day for a few weeks can lower your bad cholesterol and improve your overall cholesterol levels.
If someone with metabolic syndrome already has low 'bad' cholesterol, it might be hard to see if eating nuts helps lower it even more—especially in short studies.
If you're overweight and have metabolic health issues, eating walnuts or cashews for 8 weeks might help your body, but if you don't lose weight, those benefits could be hidden.
Eating a lot of cashews every day for two months might raise blood sugar levels in people with metabolic syndrome, even though longer-term sugar markers don’t change — so cashews could be affecting blood sugar in the short run.
If you're an obese adult with metabolic syndrome, eating a handful of walnuts or cashews every day for two months won't noticeably improve your cholesterol, blood pressure, or inflammation—if you don't gain or lose weight.
In these lab mice, making certain immune proteins seems to go hand-in-hand with signs of thyroid damage and the immune system reacting to its own thyroid parts.
In mice, using a specific immune trigger over time is linked to thyroid cell death and a type of harmful immune cell showing up in the thyroid.
When certain lab mice are given a specific piece of a thyroid protein over 18 weeks, it seems to trigger an immune reaction that damages their thyroid, leading to signs of underactive thyroid like high TSH levels.