Is it true?
Claims you hear everywhere get checked against scientific research here. Every page explains how strong the evidence is, why, and which papers support that. A page goes live only after it passes strict evidence checks, and each one says whether an editor reviewed it.
13 claims checked · How we check
Supplements
Do omega-3 fish oil supplements protect your heart?
Current evidence is inconclusive on whether omega-3 fish oil supplements reduce the risk of heart attack and stroke, and meta-analyses show mixed results.
5 scientific papersSupported by researchDo zinc lozenges shorten a cold?
Yes, zinc lozenges significantly shorten how long a common cold lasts.
5 scientific papersNot enough dataDoes vitamin C prevent or cure the common cold?
The available evidence is inconclusive because studies show mixed results on whether vitamin C prevents colds, though some indicate it can shorten their duration and reduce symptom severity.
5 scientific papersNot enough dataDoes vitamin D prevent colds and flu?
Meta-analyses report mixed results, so current evidence on whether vitamin D supplementation prevents colds and respiratory infections is inconclusive.
5 scientific papersLearning
Do learning styles really exist?
No, tailoring instruction to preferred learning styles does not improve student learning outcomes, as empirical evidence consistently refutes this widely held educational myth.
3 scientific papersSupported by researchIs testing yourself better than rereading?
Yes. Compared with repeated rereading or studying, practice testing significantly improves long-term retention.
3 scientific papersNutrition
Does drinking coffee dehydrate you?
No. Moderate coffee consumption does not cause dehydration, because the fluid in the coffee largely offsets its mild diuretic effect.
5 scientific papersNot confirmedDoes intermittent fasting work better than ordinary dieting?
No, intermittent fasting does not lead to greater weight loss than continuous calorie restriction.
5 scientific papers