I have taken 60mg of zinc every day since Friday. Friday I also took 10g of vitamin C. Every day since Saturday, including today which is 3 days, I've taken 20g of vitamin C a day.
I've also taken a garlic extract supplement just for the heck of it though I've never had any success with garlic for boosting the immune system or ridding of pathogens whether kept in my mouth whole, cut up or as an extract.
Friday my symptoms were barely there but I could feel a cold ever so slightly creeping up (and we all know how it starts). Saturday my throat began hurting, I was coughing and my nose was runny. The mucus I would cough up was grayish-yellowish and thick. I also had a foul mushroom-like taste in my mouth and nose
The day after that, Sunday, it had gotten slightly worse.
Today, Monday, it's gotten ever so slightly better but it will definitely be at least 2 days to fully recover.
I only had diarrhea once when I took the 20g of vitamin C. The zinc made me drowsy and almost gave me a benzo or high-dose theanine feeling, probably because I had too high levels of zinc.
I added 2mg of copper for 2 days to counteract copper deficiency, as well as adding a few mg of iron just in case I was lacking that as well, but it made no difference.
All in all it's surprisingly ineffective. It's likely that without these supplements it would've been much worse and lasted longer but still I have been bed ridden. Had I gone outside then I'm sure the supplements would do nothing to stop it from getting much more severe.