Can you have too much vitamin C?
No, but it is important to make sure vitamin C intake does not exceed the recommended dietary allowance. According to the Dietary Reference Intake (DRI) for vitamin C, an adult needs 95mg of Vitamin C per day. Excess vitamin C can actually cause toxicity and should be avoided in this case.
That said, there are potential health benefits that come with higher doses of vitamin C since it has strong antioxidant properties.
Vitamin C (Ascorbic Acid) is an essential nutrient that the human body cannot synthesize. As such, it must be consumed from food or supplements in order to be present in the body. It is one of the most important antioxidants in the human body, and plays a key role in many physiological processes that occur on a daily basis within cells. In particular, vitamin C is known for its ability to aid the production of collagen needed to produce healthy skin and connective tissue. As a result, consuming adequate amounts of vitamin C is important for all age groups, because older adults are known to be at higher risk for developing diseases related to the breakdown of collagen (e.g., osteoarthritis and heart disease).
One way to make sure you're getting enough Vitamin C is by popping a vitamin C supplement daily. While it's important to get enough Vitamin C in your diet, supplements can also be beneficial in cases where daily doses are not possible due to limitations on diet.
When discussing the absorption of nutrients – whether it's from food or a supplement – vitamin C (as the name suggests) is considered an ascorbate. The bioavailability of ascorbate is largely based on the pH of the gastrointestinal tract. Ascorbate is a weak acid and is typically found in bodily fluids in very low concentrations. As we eat Vitamin C, part of it transforms into the related vitamin called L-ascorbic acid (ASC). This process occurs in our stomachs as well as our intestines for non-stomach contents, or when absorbing food we consume as a snack.