The intake recommendations (D-A-CH reference values) of the German Nutrition Society (DGE) presented below are aimed at healthy people of normal weight. They do not refer to the supply of sick and convalescent people. Individual requirements may therefore be higher than the DGE intake recommendations (e.g., due to dietary habits, consumption of stimulants, long-term medication, … Vitamin C: Intake
Antioxidant protection Vitamin C is an important antioxidant in the aqueous environment of our body. As a “free radical scavenger”, it particularly scavenges toxic oxygen radicals, such as superoxide, hydrogen peroxide, singlet oxygen, and hydroxyl and peroxyl radicals. This prevents their penetration into the lipid system and thus lipid peroxidation. The antioxidant properties of vitamin … Vitamin C: Functions
Interactions of vitamin C with other micronutrients (vital substances): Iron To favor the absorption of iron by reduction to Fe2+, 25 to 75 mg of vitamin C or more must be present in a meal. Possibly, vitamin C further increases the stability of intracellular ferritin. As a result, phagocytosis of ferritin into lysosomes, and thus … Vitamin C: Interactions
Vitamin C plasma concentrations around 20 µmol/L result in nonspecific early symptoms, such as decreased physical performance, increased fatigue, and irritability. Persistent undersupply is manifested by increased capillary fragility, decreased resistance to infection, gingivitis, extensive mucosal and skin hemorrhages. Plasma concentrations below 10 µmol/L (0.17 mg/dl) are considered manifest vitamin C deficiency. Clinically manifest vitamin … Vitamin C: Deficiency Symptoms
At-risk groups for vitamin C deficiency include individuals with. An inadequate intake due to malnutrition or prolonged absorption disorders associated with gastrointestinal diseases Increased need (pregnancy and lactation, stress). Regular cigarette use (additional need is 40 mg daily). In convalescent periods after surgery and illness. Attention. Note on the state of supply (National Nutrition Survey … Vitamin C: Risk Groups
The European food safety authority (EFSA) was unable to derive a safe maximum daily intake due to a lack of data with very high doses of vitamin C. In addition to conventional dietary intake, EFSA considers a daily amount of 1,000 mg of vitamin C in the form of supplements to be safe. The amount … Vitamin C: Safety Assessment
In the National Nutrition Survey II (NVS II, 2008), the dietary behavior of the population was investigated for Germany and it was shown how this affects the average daily nutrient intake with macro- and micronutrients (vital substances). The intake recommendations (D-A-CH reference values) of the German Nutrition Society (DGE) are used as the basis for … Vitamin C: Supply Situation
