The Claim
A single 500 mg oral dose of standard vitamin C increases plasma vitamin C concentrations by approximately 1556% and leukocyte vitamin C concentrations by approximately 1515% compared to placebo in healthy adults.
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.
Taking one 500 mg vitamin C pill increases vitamin C levels in the blood and white blood cells by about 15 times compared to taking a placebo.
See the scientific wording
A single 500 mg oral dose of standard vitamin C increases plasma and leukocyte concentrations by approximately 1556% and 1515% respectively compared to placebo in healthy adults, confirming its bioavailability despite known degradation risks.
When vitamin C is swallowed, it survives the stomach and reaches the intestines, where special transporters pull it into the bloodstream. From there, it travels to immune cells and enters them using the same type of transporters, raising levels in both blood and immune cells.
What the research says
1 studyEven regular vitamin C pills can boost vitamin C levels in your blood and immune cells after just one dose — this study proved it by comparing them to a placebo. The liposomal version worked even better, but the regular kind still worked well.
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.