The Claim
In healthy adults aged 50–74, baseline serum 25-hydroxyvitamin D [25-(OH)D] concentrations are not significantly correlated with humoral immune responses, as measured by antibody titers, to the seasonal trivalent influenza vaccine containing A/California/H1N1-like virus at any time point following vaccination.
What the research says
Supports is higher
Support is ahead, but a single strong opposing study can change this.
These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.
People aged 50 to 74 who have high or low levels of vitamin D in their blood before getting the flu shot tend to have about the same level of antibody response after the shot—vitamin D doesn’t seem to make a difference.
See the scientific wording
In healthy adults aged 50–74, baseline vitamin D levels (25-(OH)D) show no significant correlation with humoral immune responses (e.g., antibody titers) to the seasonal trivalent influenza vaccine containing A/California/H1N1-like virus at any timepoint after vaccination.
What the research says
1 studyThe study checked if people’s vitamin D levels before getting the flu shot affected how well their body made antibodies afterward — and found no link. So, vitamin D levels don’t seem to change how well the flu vaccine works in older adults.
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.