Up your protein intake.
Take:
multivitamin
zinc
magnesium
PROBIOTICS
Fruit based anti-oixidants
Vitamin C
beta-alanine (my own hypothesis...as yet to be revealed)
I always mega dose zinc.
Zinc Gluconate: (preferably lozenge or nasal spray form/route as studies seem to support this delivery method better due to more adequate distrubution in infected nasal mucosa tissues to illicit benefits.) While zinc's mechanism of action in cold prevention is unclear, it has shown to have immune boosting/anti-viral properties. Taken as a lozenge or preferably nasal spray, zinc releases ions that prevent the common cold virus from maturing and attaching to airways. Choose zinc gluconate or zinc acetate without flavoring agents such as citric and tartaric acids—they appear to stunt its preventive powers. Take it only once or twice a day for a week at a time.
Careful with mega dosing Vit C...it can cause diarhea. ...
... Orally ingested zinc hasn't proven effective in 'cold virus' attenuation, but the nasal and lozenge treatments have. This is because it demonstrates its beneficial effects when directly placed in the nasal mucosa where a typical rhinovirus germinates.