Even many of those who generally do not take nutritional supplements on a regular basis will still reach for the odd Vitamin C tablet when feeling a cold coming on, compliments of Linus Pauling's best-selling book Vitamin C and the Common Cold, which rocketed the immune-enhancing effects of Vitamin C to fame, and thanks to the many studies, books, and articles that since followed. While the latest recommended daily or dietary allowance stands now at 75-90 mg per day for adults, a higher dietary reference intake is again in review. However, many of those who regularly supplement Vitamin C, take in the vicinity of 250 mg to 1,000 mg day, and there are those who take up to, and beyond 10,000 mg daily... Full Text