(Question) Is Vitamin C 'megadose therapy' effective?

Known to be good for relieving fatigue Vitamin C 'megadose therapy' Will it be effective?

Now that the seasons have changed, I can definitely feel my body is different. It isn't severe, so I haven't visited a hospital, but

It seems like I catch a cold easily now that my immune system is low. fatigue As it builds up, the times when I feel unwell increase.
I feel like it is naturally interfering with my daily life as well, consistently vitamin I am taking [it], but
I heard that taking high-dose Vitamin C megadoses helps a lot with fatigue recovery, so I am half excited and half worried.
Vitamin C 'megadose' Try it out effect Has anyone seen this?
Is this the right method for my health? I am seeking advice.