Many individuals hesitate to take Vitamin C supplements due to fears about potential long-term health consequences, specifically kidney problems and stomach irritation. The concern stems from the acidic nature of Vitamin C, which can exacerbate existing gastric issues. While high doses *can* contribute to discomfort, experts emphasize that moderate intake is generally safe for most people. The body regulates Vitamin C levels, excreting excess amounts. Individuals with pre-existing kidney conditions should consult a doctor before supplementing. Understanding the potential for stomach upset allows for informed choices, such as taking Vitamin C with food or opting for buffered forms.