Latest evidence update: 2026-12-01
One-off plan, anchored to the night you're going out. We'll generate a calendar file you can drop into Google Calendar, Apple Calendar, or Outlook.
First lozenge at symptom onset, then 1 lozenge every 2 hours while awake (target 6-9/day, 75-90mg/day total).
09:00 AM
Jul 6
at start
For severity reduction in those already taking ≥1g/day. Cochrane: no significant effect on cold duration in general population.
09:00 AM
Jul 6
0m after
continuous
09:00 AM
Jul 6
0m after
At symptom onset. 9-RCT meta-analysis (PMID 40311928) shows reduced URTI duration (SMD=-0.19), reduced incidence (RR=0.81), and 82% reduction in antibiotic use.
09:00 AM
Jul 6
0m after
Continue lozenge regimen through day 1; Cochrane evidence is specifically about the first 24 hours.
05:00 PM
Jul 6
8h after
For severity reduction. Per Cochrane 2013, vitamin C has no significant duration effect in the general population.
05:00 PM
Jul 6
8h after
Second dose to maintain coverage through day 1.
05:00 PM
Jul 6
8h after
Opens an .ics file — your calendar app handles the rest. Nothing stored on our side.
ProtocolEngine provides general health information based on published research. This is not medical advice. Consult a healthcare professional before starting any supplement or health protocol.