Research
Micronutrients & recovery
Vitamin D supplementation (specifically Vitamin D3) does not significantly reduce all-cause mortality in adults compared to placebo, although it significantly reduces cancer mortality by 16%.
Taking Vitamin D supplements will not help you live longer, according to this large review of 75,000+ people. However, it may help reduce the risk of dying from cancer. Focus on maintaining healthy levels for bone health or other indicated reasons, but do not expect it to extend your lifespan.
StrongRefutesHIGH confidence
Vitamin D supplementation was not associated with all cause mortality... Vitamin D supplementation statistically significantly reduced the risk of cancer death (0.84, 0.74 to 0.95, 0%).
Why this rating
Based on a systematic review and meta-analysis of 52 randomized controlled trials with 75,454 participants, rated as high quality evidence via GRADE.
Source
Association between vitamin D supplementation and mortality: systematic review and meta-analysis
Yu Zhang et al. · BMJ · 2019
Meta-analysis · 52 studiesCited 359×
Read the paper This is one finding among thousands. Every one is graded and traced to its source, so you can see what the evidence actually supports. Browse the research →