Nutrition
Nutrition evidence covers whole dietary patterns, individual foods, and supplements, and how each relates to measurable health outcomes such as mortality, cardiovascular disease, and metabolic health. This hub links to evidence records that state what the research actually supports, not what a headline implies.
4 evidence records in this topic
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Do omega-3 fatty acid supplements reduce symptoms of depression?
Cochrane Database of Systematic Reviews · 2021
The evidence is mixed. Some meta-analyses of randomized trials find a modest reduction in depression symptoms with omega-3 supplementation, particularly formulations high in EPA, while the most rigorous Cochrane systematic review found the evidence overall is low to moderate certainty and any benefit, if real, appears to be small.
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Does following a Mediterranean diet reduce the risk of dying from any cause?
BMJ · 2008
Yes, with strong and consistent support. People who more closely follow a Mediterranean-style diet, rich in vegetables, fruit, whole grains, legumes, olive oil, and fish, with limited red and processed meat, have a lower risk of dying from any cause over long-term follow-up compared with people who follow it less closely.
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Does time-restricted eating improve metabolic health?
Cell Metabolism · 2018
Short-term evidence suggests time-restricted eating, especially eating earlier in the day within a 6- to 10-hour window, may improve insulin sensitivity, blood pressure, and some cardiometabolic markers, sometimes even without weight loss. Evidence for meaningful long-term weight loss specifically is more mixed, and larger, longer trials are still needed.
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Does vitamin D supplementation reduce the risk of acute respiratory infections?
The BMJ · 2017
Evidence suggests vitamin D supplementation modestly reduces the risk of acute respiratory tract infections overall, with the clearest benefit in people who are vitamin D deficient at baseline and in those taking daily or weekly doses rather than large infrequent bolus doses.