Vitamin C, also known as ascorbic acid, is an essential vitamin for humans, which the body cannot produce on its own.
Vitamin C slows down the aging of cells and affects, among other things, the condition of the skin and mucous membranes. Vitamin C is essential for the formation of collagen. Collagen is a building material for connective tissues and ligaments, playing an important role in the function of the skin, blood vessels, tendons, and ligaments.
100 grams of grapefruit pulp contains:
Calculated energy 136 kJ, of which
81% from carbohydrates
8% from fat
8% from protein
3% from organic acids
Absorbable carbohydrates: 6.5 g, of which
2.6 g fructose
2.2 g glucose
1.7 g sucrose
Fat: 0.3 g
Protein: 0.6 g
Alcohol: 0.0 g
According to Harvard, the relationship between vitamin C and heart health is still unclear. Some large observational studies suggest that higher vitamin C intake – particularly from fruits and vegetables – may be associated with a reduced risk of cardiovascular disease and stroke. This is likely due to vitamin C's antioxidant properties, which protect blood vessels and reduce plaque formation.
However, clinical studies on vitamin C supplements have been inconsistent, so recommendations for higher vitamin C intake are unlikely to be beneficial in preventing heart disease.
Higher intake of vitamin C from food has been linked in studies to a reduced risk of cataracts. However, according to a Harvard article, high doses of vitamin C supplements have even been associated with an increased risk of cataracts.
Epidemiological studies have shown that a diet rich in fruits and vegetables is associated with a lower risk of several cancers. This may be partly due to the vitamin C content of the food. Vitamin C prevents the formation of cancer-causing nitrosamines from nitrites in the stomach. However, studies focusing solely on vitamin C supplements have not consistently shown the same effect.
Excessive vitamin C can cause diarrhea, nausea, vomiting, heartburn, muscle cramps, headaches, and insomnia. Large doses of vitamin C may be harmful to individuals who are prone to forming calcium oxalate kidney stones. Oxalate is one of the breakdown products of vitamin C. Excessive consumption of supplements during pregnancy can also affect the baby's vitamin C levels after birth.
The possibility of drug interactions, as grapefruit can interfere with the metabolism of certain medications, which may lead to dangerous drug levels in the body.
Grapefruit is not compatible with certain medications. These include, among others, some blood pressure medications, cholesterol-lowering drugs, and immunosuppressive medications.
High acidity, which can cause or worsen heartburn, reflux symptoms, or stomach issues in sensitive individuals.
High sugar content compared to other fruits, which can cause a rise in blood sugar, particularly concerning for diabetics.
The risk of allergic reactions in some individuals, which can cause symptoms such as itching, swelling, or difficulty breathing.
Glycemic index 25
Calories 42 kcal
Flavanones - Hesperidin, naringin - Citrus fruits
