Understanding vitamin C’s actual mechanism of action—regeneration rather than stimulation—carries important practical implications for clinical decision-making and patient counseling. For healthy adults without physiological stress, 200 milligrams of daily vitamin C intake achieves optimal neutrophil saturation, making supplementation beyond this threshold unnecessary for general immune maintenance.
However, clinical contexts dramatically alter requirements. Patients undergoing surgery, managing acute infections, or experiencing significant physical stress require 300-1,000 milligrams daily to support elevated immune cell demands. This explains why supplementation shows inconsistent benefits in healthy populations but demonstrates clearer clinical value in acutely ill or stressed individuals.
The regenerative model also explains why excessive supplementation fails to produce additional immune enhancement—once saturation is achieved, additional vitamin C cannot increase immune stimulation. Rather than promoting blanket supplementation, evidence-based practice should target vitamin C intake to individual stress profiles and clinical circumstances.
Read the full article on GMJ Newsroom.
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