1. Gastrointestinal Disturbances.

One of the most common side effects of high doses of vitamin C is gastrointestinal disturbances, including diarrhea, nausea, vomiting, and abdominal cramps. These symptoms are usually temporary and resolve once vitamin C intake is reduced.

2. Kidney Stones.

Excessive intake of vitamin C may increase the risk of kidney stone formation, particularly in individuals with a history of kidney stones or pre-existing kidney conditions. This is because vitamin C can be converted into oxalate, a compound that can contribute to the formation of kidney stones.

3. Iron Absorption Interference.

Vitamin C enhances the absorption of non-heme iron (iron from plant-based sources) in the body. While this is generally beneficial, individuals with iron overload disorders or hemochromatosis should be cautious as excessive iron absorption can worsen their condition.

Conclusion.

Vitamin C is an essential nutrient with numerous health benefits, but like any other substance, it can cause adverse effects when consumed in excessive amounts. Gastrointestinal disturbances, kidney stones, and interference with iron absorption are some potential side effects associated with high doses of vitamin C. It's essential to consume vitamin C within recommended limits and consult healthcare professionals before starting any supplementation regimen, especially for individuals with underlying health conditions.