Absorption and Bioavailability Factors It is a common misconception that swallowing high doses guarantees high cellular uptake. However, when intake jumps to 1,200 milligrams, absorption rates can plummet to less than 50%.
Understanding the Diarrhea Risk from Excess Vitamin C Intake
This biological ceiling is why megadoses often result in waste rather than enhanced benefits. This is the maximum daily intake unlikely to cause adverse health effects for most people.
While this nutrient is water-soluble, meaning excess amounts are typically flushed from the body, there are established boundaries for safety and efficacy. Determining how much vitamin C you can take in one day depends on a combination of your individual health status, biological factors, and the specific form of the nutrient you are consuming.
Why Too Much Vitamin C Leads to Diarrhea and Safety Limits
Common sources include citrus fruits like oranges and grapefruit, bell peppers, strawberries, kiwi, and broccoli. For most adult men, the RDA is 90 milligrams, while for adult women it is 75 milligrams.
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