I agree that you need to take vit c daily. Best to take vit c that is high in absorption rate. Why we need to replenish vit c everyday? Because human bodies does not produce vit c. My doctor advice me to take up to 15000mg of vit c a day. So its actually depends on individual.
To know how much dosage your body can take its after consuming enough dosage that wont make you diarrhea. Human bodies are not the same as animal body. Certain animal can produce vit c by its own, hence they do not need vit c orally as replacement. Keep taking vit c. It helps prevent scurvy.