It was a head/throat/chest cold that kept moving around in different places.
I supplemented 5,000 IU of vitamin D in the morning. I supplemented 1 gram of vitamin C 3 times a day. I drank plenty of water. I slept plenty.
You would think that it would have been gone in a few days.
Should I have supplemented more?
What would you have done?
Because Vitamin C + D do not make you into superman.
Really, on your death bed, are you gonna start complaining to the universe: 'But, I took all the vitamins I could afford, I haven't had gluten in years, I'm not supposed to die.'
'What do you mean you wanna break up? Bitch don't you know I eat grass-fed liver twice a week? You don't deserve me.'
'Professor, I think I deserve an A on this test. I took all of the over-the-counter nootropics I could find!'
Because it wasn't a cold. It was the flu. And for this flu, it is par for the course. Everyone I know who has had it had symptoms lasting over a week, and they morphed over time. Starting with a sore throat, then going into the sinuses, and finally ending with a cough.
We get sick. Get used to it.
I would have taken the same things for cold/flu symptoms. I take turmeric daily for general immune boosting and add oregano oil if I suspect any kind of infection. I have zero proof that they help but you might want to experiment with them. I haven't caught any colds for about a year.
I also had a cold that lasted 1.5 weeks after Thanksgiving, and this is incredibly rare for me. I was also taking vitamin D3, and DayQuil to make it through a few work events, though I understand that it just suppresses the symptoms, but it barely did that. It was a weird cold, but it did come after being exposed to 5 different sick households, after a tour de New England and Long Island, plus having wheat products, so who knows what shot my immune system. The weirdest thing about it was that it was not really bad, just insistent and annoying. Maybe you had some naughty foods during the holidays?
The old folk saying still applies, "A cold is 3 days coming, 3 days with you and 3 days leaving." Except in my case the leaving part has always been more like 3 weeks of mild but annoying symptoms.
At the first sign of a virus, I take 40,000 IUs of Vitamin D3 for 2-3 days.
Haven't been sick at all in over 2 years.
It's important to get your D level tested and supplement to 50-80 ng/ml year-round. Magnesium supplementation is essential. A & K may be necessary, if you don't eat dairy or organ meats.