Sue,
A glass of Orange juice is a good way to start the day except for all the Fructose. That said you would need to eat 36 naval oranges a day to get 3 grams of vitamin C (Ascorbic Acid). 1000 mg vitamin C capsules are much less expensive and the powdered bulk vitamin C even less expensive. Watch the video of Linus Pauling explain why we need 6 to 7 grams/day vitamin C to prevent disease and illness. He took 18 grams/day vitamin C.
Linus Pauling was 92 when this presentation was recorded. He was awarded 2 individual Nobel Prizes, the first in Chemistry for his papers on Quantum Mechanics and the shape of molecules and the second for Peace for stopping above ground nuclear warhead testing.
He had many critics of his recommendation to take 7 grams of vitamin C per day and even more if suffering from a disease. When he died at age 93, he still had two more Nobel Prizes than any of his critics... and, he had outlived most of them.
Take care and please keep us posted.
V/R, Batch