The recommended daily intake of vitamin C depends on age, sex, and lifestyle factors. For most adults, the general guidelines are:
- Adult men: 90 mg per day
- Adult women: 75 mg per day
- Pregnant women: 85 mg per day
- Breastfeeding women: 120 mg per day
- Smokers require about 35 mg more daily than nonsmokers due to increased oxidative stress
The tolerable upper intake level for adults is 2,000 mg per day, above which there could be side effects such as stomach irritation. For general health and immune support, some sources suggest up to 500 to 1,000 mg daily is safe and used in anti-aging or immune-boosting contexts, but it is best to consult a doctor for high doses.
