Oxidative stress can be remediated by the introduction of antiosidants and C is by far the best and most well tolerated. You will need both C crystals (get a big bottle) and liposomal C, which, which still pricey, is a fraction of what it was a decae ago when it was new.
The C crystals are to make a gargle. A half teaspoon of C in a glass of warm water with ther juice of half a fresh lemon (honey is needed, it's awful). Gargle with that, it kills pain, strips away mucous and repairs epithilain cells. That kind of acid can occasionally be hard on the stomach. Milk or bicarb fixes that.
I can't say enough good things about Liposoimal C. Via the oral route, regular c is only absorbed by at moth 10%, so to get a gram of C in the body would require 10 grams of C which would give you the runs. One Liposomal C gram gets as much into you as 10 grams of crystals but without any upset.
We take 1 or two grams a day when healtjy and up to 10 a day when ill. At that level it'll treat Ebola according to once source who did cure Marburg with it. (Cathcart/Klenner)