Does a daily chewable vitamin C really work for adults.?

Really work for what. What is it that you're trying to achieve w/daily chewable vitamin c? And at what dose? Sure, it can help prevent scurvey but that hasn't been a major issue for quite some time now. Prevent cancer, stroke, etc? Randomized controlled studies demonstrate no benefit. However, vitamin c levels are a good marker of fruit & vegetable consumption & thus linked to inverse risk of diabetes. No proof of caus.