The Claim
Placebo ingestion produces negligible concentrations of vitamin C in plasma and leukocytes, which confirms that increases in vitamin C levels observed after administration of vitamin C formulations are attributable to the administered compound and not to background levels or assay artifacts.
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 a placebo pill results in no measurable vitamin C in the blood or white blood cells, which shows that any increase in vitamin C after taking vitamin C supplements comes from the supplement itself and not from background levels or testing errors.
See the scientific wording
Placebo ingestion results in negligible plasma and leukocyte vitamin C concentrations, confirming that the observed increases with vitamin C formulations are due to the administered compound and not background levels or assay artifacts.
When vitamin C is swallowed, it survives the stomach and is taken up by cells in the intestine using special transporters that require sodium. These transporters move vitamin C into the blood, where it circulates and enters immune cells using the same type of transporter. Without vitamin C in the pill, no increase happens because the body doesn’t produce or release vitamin C from storage in response to swallowing a pill.
What the research says
1 studyWhen people took a fake pill with no vitamin C, their blood and immune cell vitamin C levels stayed low — but when they took real vitamin C pills, levels went up. This proves the increase was from the vitamin C, not from measurement errors.
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.