Cold and flu season preparation

Protocol
Powerful immune support, avoid alcohol-based tinctures
Goldenseal
Immune support, speaks for itself, needs no introduction
Immune system support, avoid alcohol-based versions
2 dropperfuls, liquid gold for immune system, contains active quercetin and bioactive polyphenols
Vitamin C
Micro C (buffered vitamin C), not straight ascorbic acid which burns the stomach
Zinc
Liquid zinc sulfate, 2 dropperfuls for immune support during cold and flu season

Sources(1)