Vitamin C is a water-soluble vitamin that is popularly used as a remedy for colds and flu. Being water-soluble means that it can dissolve in water. It cannot be stored in the body and therefore needs to be ingested daily via diet or supplement.
Also known as ascorbic acid, vitamin C is needed for various body functions. It helps to create collagen which is a protein material used to make connective tissue that supports different body systems, organs, bones, cartilage and more.
It is also a powerful antioxidant that helps to regenerate other antioxidants while working to neutralise harmful free radicals. Its ability to protect cells helps to keep skin, bones, cartilage and blood vessels healthy and protect against the development of certain chronic conditions like heart disease and cancers.
Vitamin C is also believed to help in the healing of wounds and shorten the life of infections. It also aids in maintaining hormone and chemical balances in the brain and nervous system, and neurotransmitter synthesis. It also supports cognitive function.
Vitamin C also beneficially interacts with other vitamins and minerals in the body. One of its most helpful interactions is the ability to promote the absorption of nonheme iron from plant food sources. This is helpful to those that do not eat animal products that are rich in iron. Vitamin C can be found in abundance in many fruits and vegetables. Some of the best food sources include citrus fruits, peppers, berries, cruciferous vegetables, and white potatoes.
According to the NHS, the recommended daily allowance (RDA) of vitamin C for adults between the age of 19 to 64 years is
40mg. As it is not stored in the body, it is necessary to get this daily amount of vitamin C from diet or supplements. Care should however be taken with supplements to avoid excessive consumption. Absorbing high amounts over 1,000mg a day can lead to symptoms of gastrointestinal distress. These symptoms will however abate once your vitamin C levels drop.
It is difficult for a healthy person to suffer toxicity of vitamin C even when consumed in high amounts. This is because the higher the amount of vitamin C that is consumed, the less the body will absorb as tissues become saturated. The excess amount is simply allowed to pass through and be excreted through urine. This can however increase the level of uric acid which in turn can increase the risk of kidney stones and gout. Some studies do indicate that very high levels of vitamin C may have a damaging effect on tissues.
Too little intake of vitamin C can lead to a deficiency called
scurvy. This condition is very rare given the many easily available and rich food sources there are for vitamin C. It may however be possible to acquire scurvy if:
- you are eating very little, perhaps due to illness or treatments that affect appetite
- you have no access to fresh fruits or vegetables to include in your diet for a prolonged period
- you smoke, which can reduce the amount of vitamin C your body can absorb from food
- you take high amounts of alcohol and illicit drugs that interfere with normal nutrition
- you are pregnant or breastfeeding and therefore need larger amounts of vitamin C than usual