opti · Immunonutrition
Vitamin C — Reduction in Illness Duration
Regular daily intake only · Therapeutic use at onset of symptoms shows no effect
Bar chart: Vitamin C reduces illness duration by 8% in adults, 14% in children, 18% in children taking 1-2g per day
0
4
8
12
16
18
20
Reduction in Illness Duration (%)
–8%
–14%
★
–18%
Adults
Children
Children
1–2 g/day
Children respond 2× stronger than adults
Hemilä & Chalker, Cochrane 2013 · 11,306 patients · Regular intake only