"What is the recommended daily allowance (RDA) of vitamin C? "

The FDA’s current vitamin C Recommended Daily Allowance (RDA) of a paltry 75 mg per day for women and 90 mg per day for men is, unfortunately, woefully outdated.

While science has clearly demonstrated that optimal levels of vitamin C can boost your immune system and help combat many other age-related problems, you are not likely to see many benefits at these anemic dosages.

Also, it is very important to note that studies strongly suggest that the body’s ability to absorb vitamin C declines with age.* This is why a daily serving significantly higher than the current RDA is more important as you get older. The Linus Pauling Institute recommends a daily intake of at least 400 mg of vitamin C per day, and more under specific circumstances.*